./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/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 e7e6c578d14a1dec94358c7d18f5f6f4b98e0f546876bd6ae577107ea9aa62ae --- 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 03:47:55,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:47:55,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:47:55,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:47:55,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:47:55,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:47:55,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:47:55,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:47:55,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:47:55,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:47:55,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:47:55,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:47:55,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:47:55,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:47:55,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:47:55,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:47:55,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:47:55,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:47:55,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:47:55,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:47:55,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:47:55,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:47:55,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:47:55,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:47:55,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:47:55,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:47:55,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:47:55,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:47:55,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:47:55,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:47:55,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:47:55,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:47:55,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:47:55,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:47:55,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:47:55,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:47:55,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:47:55,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:47:55,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:47:55,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:47:55,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:47:55,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:47:55,162 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:47:55,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:47:55,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:47:55,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:47:55,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:47:55,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:47:55,165 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:47:55,165 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:47:55,165 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:47:55,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:47:55,166 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:47:55,167 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:47:55,167 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:47:55,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:47:55,167 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:47:55,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:47:55,168 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:47:55,168 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:47:55,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:47:55,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:47:55,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:47:55,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:47:55,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:47:55,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:47:55,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:47:55,171 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:47:55,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:47:55,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:47:55,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:47:55,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:55,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:47:55,173 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:47:55,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:47:55,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:47:55,173 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:47:55,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:47:55,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:47:55,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:47:55,174 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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7e6c578d14a1dec94358c7d18f5f6f4b98e0f546876bd6ae577107ea9aa62ae [2022-11-03 03:47:55,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:47:55,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:47:55,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:47:55,571 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:47:55,572 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:47:55,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.c [2022-11-03 03:47:55,644 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/data/d667e2d8a/2af5c47280c8479f8b45e272d15f4349/FLAGf415788ca [2022-11-03 03:47:56,358 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:47:56,358 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.c [2022-11-03 03:47:56,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/data/d667e2d8a/2af5c47280c8479f8b45e272d15f4349/FLAGf415788ca [2022-11-03 03:47:56,514 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/data/d667e2d8a/2af5c47280c8479f8b45e272d15f4349 [2022-11-03 03:47:56,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:47:56,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:47:56,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:56,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:47:56,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:47:56,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:56" (1/1) ... [2022-11-03 03:47:56,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5161fa37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:56, skipping insertion in model container [2022-11-03 03:47:56,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:56" (1/1) ... [2022-11-03 03:47:56,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:47:56,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:47:56,897 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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.c[1014,1027] [2022-11-03 03:47:57,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:57,507 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:47:57,532 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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.c[1014,1027] [2022-11-03 03:47:57,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:57,820 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:47:57,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57 WrapperNode [2022-11-03 03:47:57,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:57,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:57,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:47:57,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:47:57,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:57,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:58,385 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3977 [2022-11-03 03:47:58,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:58,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:47:58,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:47:58,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:47:58,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:58,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:58,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:58,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:58,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:58,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:58,864 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:58,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:58,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:47:59,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:47:59,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:47:59,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:47:59,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (1/1) ... [2022-11-03 03:47:59,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:59,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:59,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:47:59,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:47:59,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:47:59,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:47:59,933 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:47:59,935 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:55:07,413 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:56:10,686 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:56:10,686 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:56:10,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:10 BoogieIcfgContainer [2022-11-03 03:56:10,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:56:10,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:56:10,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:56:10,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:56:10,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:56" (1/3) ... [2022-11-03 03:56:10,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebeed26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:10, skipping insertion in model container [2022-11-03 03:56:10,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:57" (2/3) ... [2022-11-03 03:56:10,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebeed26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:10, skipping insertion in model container [2022-11-03 03:56:10,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:10" (3/3) ... [2022-11-03 03:56:10,699 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.szymanski.1.prop1-func-interl.c [2022-11-03 03:56:10,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:56:10,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:56:10,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:56:10,772 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;@7c563beb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:56:10,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:56:10,787 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 03:56:10,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:56:10,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:10,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:56:10,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash 20053316, now seen corresponding path program 1 times [2022-11-03 03:56:10,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:10,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084688403] [2022-11-03 03:56:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:56:11,965 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:56:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:56:12,638 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:56:12,641 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:56:12,643 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:56:12,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:56:12,651 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:56:12,657 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:56:12,715 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:56:12,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:56:12 BoogieIcfgContainer [2022-11-03 03:56:12,751 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:56:12,754 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:56:12,754 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:56:12,754 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:56:12,756 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:10" (3/4) ... [2022-11-03 03:56:12,760 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:56:12,760 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:56:12,762 INFO L158 Benchmark]: Toolchain (without parser) took 496244.02ms. Allocated memory was 98.6MB in the beginning and 4.9GB in the end (delta: 4.8GB). Free memory was 55.6MB in the beginning and 4.1GB in the end (delta: -4.0GB). Peak memory consumption was 806.2MB. Max. memory is 16.1GB. [2022-11-03 03:56:12,763 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory was 77.4MB in the beginning and 77.4MB in the end (delta: 36.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:56:12,764 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1301.67ms. Allocated memory was 98.6MB in the beginning and 140.5MB in the end (delta: 41.9MB). Free memory was 55.4MB in the beginning and 74.8MB in the end (delta: -19.4MB). Peak memory consumption was 49.6MB. Max. memory is 16.1GB. [2022-11-03 03:56:12,766 INFO L158 Benchmark]: Boogie Procedure Inliner took 564.45ms. Allocated memory was 140.5MB in the beginning and 245.4MB in the end (delta: 104.9MB). Free memory was 74.8MB in the beginning and 125.2MB in the end (delta: -50.4MB). Peak memory consumption was 54.0MB. Max. memory is 16.1GB. [2022-11-03 03:56:12,771 INFO L158 Benchmark]: Boogie Preprocessor took 616.67ms. Allocated memory is still 245.4MB. Free memory was 125.2MB in the beginning and 111.1MB in the end (delta: 14.1MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. [2022-11-03 03:56:12,772 INFO L158 Benchmark]: RCFGBuilder took 491685.16ms. Allocated memory was 245.4MB in the beginning and 4.9GB in the end (delta: 4.7GB). Free memory was 111.1MB in the beginning and 4.2GB in the end (delta: -4.1GB). Peak memory consumption was 2.9GB. Max. memory is 16.1GB. [2022-11-03 03:56:12,774 INFO L158 Benchmark]: TraceAbstraction took 2059.83ms. Allocated memory is still 4.9GB. Free memory was 4.2GB in the beginning and 4.1GB in the end (delta: 169.9MB). Peak memory consumption was 172.0MB. Max. memory is 16.1GB. [2022-11-03 03:56:12,775 INFO L158 Benchmark]: Witness Printer took 6.71ms. Allocated memory is still 4.9GB. Free memory is still 4.1GB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:56:12,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory was 77.4MB in the beginning and 77.4MB in the end (delta: 36.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1301.67ms. Allocated memory was 98.6MB in the beginning and 140.5MB in the end (delta: 41.9MB). Free memory was 55.4MB in the beginning and 74.8MB in the end (delta: -19.4MB). Peak memory consumption was 49.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 564.45ms. Allocated memory was 140.5MB in the beginning and 245.4MB in the end (delta: 104.9MB). Free memory was 74.8MB in the beginning and 125.2MB in the end (delta: -50.4MB). Peak memory consumption was 54.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 616.67ms. Allocated memory is still 245.4MB. Free memory was 125.2MB in the beginning and 111.1MB in the end (delta: 14.1MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. * RCFGBuilder took 491685.16ms. Allocated memory was 245.4MB in the beginning and 4.9GB in the end (delta: 4.7GB). Free memory was 111.1MB in the beginning and 4.2GB in the end (delta: -4.1GB). Peak memory consumption was 2.9GB. Max. memory is 16.1GB. * TraceAbstraction took 2059.83ms. Allocated memory is still 4.9GB. Free memory was 4.2GB in the beginning and 4.1GB in the end (delta: 169.9MB). Peak memory consumption was 172.0MB. Max. memory is 16.1GB. * Witness Printer took 6.71ms. Allocated memory is still 4.9GB. Free memory is still 4.1GB. 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 425, overapproximation of bitwiseAnd at line 282. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_30 = 0; [L39] const SORT_4 var_111 = 1; [L40] const SORT_4 var_112 = 0; [L41] const SORT_2 var_122 = 0; [L42] const SORT_2 var_124 = 1; [L43] const SORT_3 var_181 = 0; [L44] const SORT_4 var_428 = 3; [L45] const SORT_2 var_439 = 3; [L46] const SORT_2 var_698 = 2; [L47] const SORT_4 var_707 = 2; [L49] SORT_1 input_121; [L50] SORT_1 input_123; [L51] SORT_1 input_128; [L52] SORT_1 input_129; [L53] SORT_1 input_133; [L54] SORT_1 input_134; [L55] SORT_1 input_138; [L56] SORT_1 input_139; [L57] SORT_1 input_144; [L58] SORT_1 input_145; [L59] SORT_1 input_150; [L60] SORT_1 input_151; [L61] SORT_1 input_156; [L62] SORT_1 input_157; [L63] SORT_1 input_158; [L64] SORT_1 input_164; [L65] SORT_1 input_165; [L66] SORT_1 input_166; [L67] SORT_1 input_172; [L68] SORT_1 input_173; [L69] SORT_1 input_174; [L70] SORT_1 input_180; [L71] SORT_1 input_185; [L72] SORT_1 input_186; [L73] SORT_1 input_187; [L74] SORT_1 input_188; [L75] SORT_1 input_189; [L76] SORT_1 input_190; [L77] SORT_1 input_191; [L78] SORT_1 input_192; [L79] SORT_1 input_206; [L80] SORT_1 input_210; [L81] SORT_1 input_211; [L82] SORT_1 input_212; [L83] SORT_1 input_213; [L84] SORT_1 input_214; [L85] SORT_1 input_215; [L86] SORT_1 input_216; [L87] SORT_1 input_217; [L88] SORT_1 input_231; [L89] SORT_1 input_235; [L90] SORT_1 input_236; [L91] SORT_1 input_237; [L92] SORT_1 input_238; [L93] SORT_1 input_239; [L94] SORT_1 input_240; [L95] SORT_1 input_241; [L96] SORT_1 input_242; [L97] SORT_1 input_260; [L98] SORT_1 input_270; [L99] SORT_1 input_274; [L100] SORT_1 input_278; [L101] SORT_1 input_287; [L102] SORT_1 input_293; [L103] SORT_1 input_298; [L104] SORT_1 input_307; [L105] SORT_1 input_317; [L106] SORT_1 input_327; [L107] SORT_1 input_331; [L108] SORT_1 input_335; [L109] SORT_1 input_344; [L110] SORT_1 input_350; [L111] SORT_1 input_355; [L112] SORT_1 input_364; [L113] SORT_1 input_374; [L114] SORT_1 input_384; [L115] SORT_1 input_388; [L116] SORT_1 input_392; [L117] SORT_1 input_401; [L118] SORT_1 input_407; [L119] SORT_1 input_412; [L120] SORT_1 input_421; [L122] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L123] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L124] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L125] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L126] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L127] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L128] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L129] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L130] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L131] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L132] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L133] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L134] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L135] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L136] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L137] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L138] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L139] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L140] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L141] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L142] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L143] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L144] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L145] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L146] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L147] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L148] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L149] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L150] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L151] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L152] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L153] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L154] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L155] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L156] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L157] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L158] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L159] SORT_1 state_81 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L160] SORT_1 state_83 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L161] SORT_1 state_85 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L162] SORT_1 state_87 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L163] SORT_1 state_89 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L164] SORT_1 state_91 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L165] SORT_1 state_93 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L166] SORT_1 state_95 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L167] SORT_1 state_97 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L168] SORT_1 state_99 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L169] SORT_1 state_101 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L170] SORT_1 state_103 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L171] SORT_1 state_105 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L172] SORT_1 state_107 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L173] SORT_1 state_109 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L175] SORT_2 init_7_arg_1 = var_5; [L176] state_6 = init_7_arg_1 [L177] SORT_2 init_9_arg_1 = var_5; [L178] state_8 = init_9_arg_1 [L179] SORT_2 init_11_arg_1 = var_5; [L180] state_10 = init_11_arg_1 [L181] SORT_2 init_13_arg_1 = var_5; [L182] state_12 = init_13_arg_1 [L183] SORT_2 init_15_arg_1 = var_5; [L184] state_14 = init_15_arg_1 [L185] SORT_2 init_17_arg_1 = var_5; [L186] state_16 = init_17_arg_1 [L187] SORT_2 init_19_arg_1 = var_5; [L188] state_18 = init_19_arg_1 [L189] SORT_2 init_21_arg_1 = var_5; [L190] state_20 = init_21_arg_1 [L191] SORT_2 init_23_arg_1 = var_5; [L192] state_22 = init_23_arg_1 [L193] SORT_2 init_25_arg_1 = var_5; [L194] state_24 = init_25_arg_1 [L195] SORT_2 init_27_arg_1 = var_5; [L196] state_26 = init_27_arg_1 [L197] SORT_2 init_29_arg_1 = var_5; [L198] state_28 = init_29_arg_1 [L199] SORT_1 init_32_arg_1 = var_30; [L200] state_31 = init_32_arg_1 [L201] SORT_1 init_34_arg_1 = var_30; [L202] state_33 = init_34_arg_1 [L203] SORT_1 init_36_arg_1 = var_30; [L204] state_35 = init_36_arg_1 [L205] SORT_1 init_38_arg_1 = var_30; [L206] state_37 = init_38_arg_1 [L207] SORT_1 init_40_arg_1 = var_30; [L208] state_39 = init_40_arg_1 [L209] SORT_1 init_42_arg_1 = var_30; [L210] state_41 = init_42_arg_1 [L211] SORT_1 init_44_arg_1 = var_30; [L212] state_43 = init_44_arg_1 [L213] SORT_1 init_46_arg_1 = var_30; [L214] state_45 = init_46_arg_1 [L215] SORT_1 init_48_arg_1 = var_30; [L216] state_47 = init_48_arg_1 [L217] SORT_1 init_50_arg_1 = var_30; [L218] state_49 = init_50_arg_1 [L219] SORT_1 init_52_arg_1 = var_30; [L220] state_51 = init_52_arg_1 [L221] SORT_1 init_54_arg_1 = var_30; [L222] state_53 = init_54_arg_1 [L223] SORT_1 init_56_arg_1 = var_30; [L224] state_55 = init_56_arg_1 [L225] SORT_1 init_58_arg_1 = var_30; [L226] state_57 = init_58_arg_1 [L227] SORT_1 init_60_arg_1 = var_30; [L228] state_59 = init_60_arg_1 [L229] SORT_1 init_62_arg_1 = var_30; [L230] state_61 = init_62_arg_1 [L231] SORT_1 init_64_arg_1 = var_30; [L232] state_63 = init_64_arg_1 [L233] SORT_1 init_66_arg_1 = var_30; [L234] state_65 = init_66_arg_1 [L235] SORT_1 init_68_arg_1 = var_30; [L236] state_67 = init_68_arg_1 [L237] SORT_1 init_70_arg_1 = var_30; [L238] state_69 = init_70_arg_1 [L239] SORT_1 init_72_arg_1 = var_30; [L240] state_71 = init_72_arg_1 [L241] SORT_1 init_74_arg_1 = var_30; [L242] state_73 = init_74_arg_1 [L243] SORT_1 init_76_arg_1 = var_30; [L244] state_75 = init_76_arg_1 [L245] SORT_1 init_78_arg_1 = var_30; [L246] state_77 = init_78_arg_1 [L247] SORT_1 init_80_arg_1 = var_30; [L248] state_79 = init_80_arg_1 [L249] SORT_1 init_82_arg_1 = var_30; [L250] state_81 = init_82_arg_1 [L251] SORT_1 init_84_arg_1 = var_30; [L252] state_83 = init_84_arg_1 [L253] SORT_1 init_86_arg_1 = var_30; [L254] state_85 = init_86_arg_1 [L255] SORT_1 init_88_arg_1 = var_30; [L256] state_87 = init_88_arg_1 [L257] SORT_1 init_90_arg_1 = var_30; [L258] state_89 = init_90_arg_1 [L259] SORT_1 init_92_arg_1 = var_30; [L260] state_91 = init_92_arg_1 [L261] SORT_1 init_94_arg_1 = var_30; [L262] state_93 = init_94_arg_1 [L263] SORT_1 init_96_arg_1 = var_30; [L264] state_95 = init_96_arg_1 [L265] SORT_1 init_98_arg_1 = var_30; [L266] state_97 = init_98_arg_1 [L267] SORT_1 init_100_arg_1 = var_30; [L268] state_99 = init_100_arg_1 [L269] SORT_1 init_102_arg_1 = var_30; [L270] state_101 = init_102_arg_1 [L271] SORT_1 init_104_arg_1 = var_30; [L272] state_103 = init_104_arg_1 [L273] SORT_1 init_106_arg_1 = var_30; [L274] state_105 = init_106_arg_1 [L275] SORT_1 init_108_arg_1 = var_30; [L276] state_107 = init_108_arg_1 [L277] SORT_1 init_110_arg_1 = var_30; [L278] state_109 = init_110_arg_1 VAL [init_100_arg_1=0, init_102_arg_1=0, init_104_arg_1=0, init_106_arg_1=0, init_108_arg_1=0, init_110_arg_1=0, init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_64_arg_1=0, init_66_arg_1=0, init_68_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_74_arg_1=0, init_76_arg_1=0, init_78_arg_1=0, init_7_arg_1=0, init_80_arg_1=0, init_82_arg_1=0, init_84_arg_1=0, init_86_arg_1=0, init_88_arg_1=0, init_90_arg_1=0, init_92_arg_1=0, init_94_arg_1=0, init_96_arg_1=0, init_98_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_101=0, state_103=0, state_105=0, state_107=0, state_109=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_6=0, state_61=0, state_63=0, state_65=0, state_67=0, state_69=0, state_71=0, state_73=0, state_75=0, state_77=0, state_79=0, state_8=0, state_81=0, state_83=0, state_85=0, state_87=0, state_89=0, state_91=0, state_93=0, state_95=0, state_97=0, state_99=0, var_111=1, var_112=0, var_122=0, var_124=1, var_181=0, var_30=0, var_428=3, var_439=3, var_5=0, var_698=2, var_707=2] [L281] input_121 = __VERIFIER_nondet_uchar() [L282] input_121 = input_121 & mask_SORT_1 [L283] input_123 = __VERIFIER_nondet_uchar() [L284] input_123 = input_123 & mask_SORT_1 [L285] input_128 = __VERIFIER_nondet_uchar() [L286] input_128 = input_128 & mask_SORT_1 [L287] input_129 = __VERIFIER_nondet_uchar() [L288] input_129 = input_129 & mask_SORT_1 [L289] input_133 = __VERIFIER_nondet_uchar() [L290] input_133 = input_133 & mask_SORT_1 [L291] input_134 = __VERIFIER_nondet_uchar() [L292] input_134 = input_134 & mask_SORT_1 [L293] input_138 = __VERIFIER_nondet_uchar() [L294] input_138 = input_138 & mask_SORT_1 [L295] input_139 = __VERIFIER_nondet_uchar() [L296] input_139 = input_139 & mask_SORT_1 [L297] input_144 = __VERIFIER_nondet_uchar() [L298] input_144 = input_144 & mask_SORT_1 [L299] input_145 = __VERIFIER_nondet_uchar() [L300] input_145 = input_145 & mask_SORT_1 [L301] input_150 = __VERIFIER_nondet_uchar() [L302] input_150 = input_150 & mask_SORT_1 [L303] input_151 = __VERIFIER_nondet_uchar() [L304] input_151 = input_151 & mask_SORT_1 [L305] input_156 = __VERIFIER_nondet_uchar() [L306] input_156 = input_156 & mask_SORT_1 [L307] input_157 = __VERIFIER_nondet_uchar() [L308] input_157 = input_157 & mask_SORT_1 [L309] input_158 = __VERIFIER_nondet_uchar() [L310] input_158 = input_158 & mask_SORT_1 [L311] input_164 = __VERIFIER_nondet_uchar() [L312] input_164 = input_164 & mask_SORT_1 [L313] input_165 = __VERIFIER_nondet_uchar() [L314] input_165 = input_165 & mask_SORT_1 [L315] input_166 = __VERIFIER_nondet_uchar() [L316] input_166 = input_166 & mask_SORT_1 [L317] input_172 = __VERIFIER_nondet_uchar() [L318] input_172 = input_172 & mask_SORT_1 [L319] input_173 = __VERIFIER_nondet_uchar() [L320] input_173 = input_173 & mask_SORT_1 [L321] input_174 = __VERIFIER_nondet_uchar() [L322] input_174 = input_174 & mask_SORT_1 [L323] input_180 = __VERIFIER_nondet_uchar() [L324] input_180 = input_180 & mask_SORT_1 [L325] input_185 = __VERIFIER_nondet_uchar() [L326] input_185 = input_185 & mask_SORT_1 [L327] input_186 = __VERIFIER_nondet_uchar() [L328] input_186 = input_186 & mask_SORT_1 [L329] input_187 = __VERIFIER_nondet_uchar() [L330] input_187 = input_187 & mask_SORT_1 [L331] input_188 = __VERIFIER_nondet_uchar() [L332] input_188 = input_188 & mask_SORT_1 [L333] input_189 = __VERIFIER_nondet_uchar() [L334] input_189 = input_189 & mask_SORT_1 [L335] input_190 = __VERIFIER_nondet_uchar() [L336] input_190 = input_190 & mask_SORT_1 [L337] input_191 = __VERIFIER_nondet_uchar() [L338] input_191 = input_191 & mask_SORT_1 [L339] input_192 = __VERIFIER_nondet_uchar() [L340] input_192 = input_192 & mask_SORT_1 [L341] input_206 = __VERIFIER_nondet_uchar() [L342] input_206 = input_206 & mask_SORT_1 [L343] input_210 = __VERIFIER_nondet_uchar() [L344] input_210 = input_210 & mask_SORT_1 [L345] input_211 = __VERIFIER_nondet_uchar() [L346] input_211 = input_211 & mask_SORT_1 [L347] input_212 = __VERIFIER_nondet_uchar() [L348] input_212 = input_212 & mask_SORT_1 [L349] input_213 = __VERIFIER_nondet_uchar() [L350] input_213 = input_213 & mask_SORT_1 [L351] input_214 = __VERIFIER_nondet_uchar() [L352] input_214 = input_214 & mask_SORT_1 [L353] input_215 = __VERIFIER_nondet_uchar() [L354] input_215 = input_215 & mask_SORT_1 [L355] input_216 = __VERIFIER_nondet_uchar() [L356] input_216 = input_216 & mask_SORT_1 [L357] input_217 = __VERIFIER_nondet_uchar() [L358] input_217 = input_217 & mask_SORT_1 [L359] input_231 = __VERIFIER_nondet_uchar() [L360] input_231 = input_231 & mask_SORT_1 [L361] input_235 = __VERIFIER_nondet_uchar() [L362] input_235 = input_235 & mask_SORT_1 [L363] input_236 = __VERIFIER_nondet_uchar() [L364] input_236 = input_236 & mask_SORT_1 [L365] input_237 = __VERIFIER_nondet_uchar() [L366] input_237 = input_237 & mask_SORT_1 [L367] input_238 = __VERIFIER_nondet_uchar() [L368] input_238 = input_238 & mask_SORT_1 [L369] input_239 = __VERIFIER_nondet_uchar() [L370] input_239 = input_239 & mask_SORT_1 [L371] input_240 = __VERIFIER_nondet_uchar() [L372] input_240 = input_240 & mask_SORT_1 [L373] input_241 = __VERIFIER_nondet_uchar() [L374] input_241 = input_241 & mask_SORT_1 [L375] input_242 = __VERIFIER_nondet_uchar() [L376] input_242 = input_242 & mask_SORT_1 [L377] input_260 = __VERIFIER_nondet_uchar() [L378] input_270 = __VERIFIER_nondet_uchar() [L379] input_274 = __VERIFIER_nondet_uchar() [L380] input_278 = __VERIFIER_nondet_uchar() [L381] input_287 = __VERIFIER_nondet_uchar() [L382] input_293 = __VERIFIER_nondet_uchar() [L383] input_298 = __VERIFIER_nondet_uchar() [L384] input_307 = __VERIFIER_nondet_uchar() [L385] input_317 = __VERIFIER_nondet_uchar() [L386] input_327 = __VERIFIER_nondet_uchar() [L387] input_331 = __VERIFIER_nondet_uchar() [L388] input_335 = __VERIFIER_nondet_uchar() [L389] input_344 = __VERIFIER_nondet_uchar() [L390] input_350 = __VERIFIER_nondet_uchar() [L391] input_355 = __VERIFIER_nondet_uchar() [L392] input_364 = __VERIFIER_nondet_uchar() [L393] input_374 = __VERIFIER_nondet_uchar() [L394] input_384 = __VERIFIER_nondet_uchar() [L395] input_388 = __VERIFIER_nondet_uchar() [L396] input_392 = __VERIFIER_nondet_uchar() [L397] input_401 = __VERIFIER_nondet_uchar() [L398] input_407 = __VERIFIER_nondet_uchar() [L399] input_412 = __VERIFIER_nondet_uchar() [L400] input_421 = __VERIFIER_nondet_uchar() [L403] SORT_1 var_113_arg_0 = state_55; [L404] SORT_4 var_113_arg_1 = var_111; [L405] SORT_4 var_113_arg_2 = var_112; [L406] EXPR var_113_arg_0 ? var_113_arg_1 : var_113_arg_2 [L406] SORT_4 var_113 = var_113_arg_0 ? var_113_arg_1 : var_113_arg_2; [L407] SORT_1 var_114_arg_0 = state_81; [L408] SORT_4 var_114_arg_1 = var_111; [L409] SORT_4 var_114_arg_2 = var_112; [L410] EXPR var_114_arg_0 ? var_114_arg_1 : var_114_arg_2 [L410] SORT_4 var_114 = var_114_arg_0 ? var_114_arg_1 : var_114_arg_2; [L411] SORT_4 var_115_arg_0 = var_113; [L412] SORT_4 var_115_arg_1 = var_114; [L413] SORT_4 var_115 = var_115_arg_0 + var_115_arg_1; [L414] SORT_1 var_116_arg_0 = state_107; [L415] SORT_4 var_116_arg_1 = var_111; [L416] SORT_4 var_116_arg_2 = var_112; [L417] EXPR var_116_arg_0 ? var_116_arg_1 : var_116_arg_2 [L417] SORT_4 var_116 = var_116_arg_0 ? var_116_arg_1 : var_116_arg_2; [L418] SORT_4 var_117_arg_0 = var_115; [L419] SORT_4 var_117_arg_1 = var_116; [L420] SORT_4 var_117 = var_117_arg_0 + var_117_arg_1; [L421] var_117 = var_117 & mask_SORT_4 [L422] SORT_4 var_118_arg_0 = var_117; [L423] SORT_4 var_118_arg_1 = var_111; [L424] SORT_1 var_118 = var_118_arg_0 <= var_118_arg_1; [L425] SORT_1 var_119_arg_0 = ~state_109; [L426] var_119_arg_0 = var_119_arg_0 & mask_SORT_1 [L427] SORT_1 var_119_arg_1 = ~var_118; [L428] var_119_arg_1 = var_119_arg_1 & mask_SORT_1 [L429] SORT_1 var_119 = var_119_arg_0 & var_119_arg_1; [L430] var_119 = var_119 & mask_SORT_1 [L431] SORT_1 bad_120_arg_0 = var_119; [L432] CALL __VERIFIER_assert(!(bad_120_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, 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, 0.9s 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 03:56:12,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/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 e7e6c578d14a1dec94358c7d18f5f6f4b98e0f546876bd6ae577107ea9aa62ae --- 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 03:56:15,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:56:15,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:56:15,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:56:15,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:56:15,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:56:15,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:56:15,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:56:15,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:56:15,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:56:15,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:56:15,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:56:15,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:56:15,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:56:15,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:56:15,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:56:15,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:56:15,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:56:15,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:56:15,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:56:15,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:56:15,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:56:15,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:56:15,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:56:15,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:56:15,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:56:15,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:56:15,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:56:15,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:56:15,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:56:15,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:56:15,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:56:15,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:56:15,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:56:15,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:56:15,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:56:15,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:56:15,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:56:15,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:56:15,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:56:15,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:56:15,877 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:56:15,910 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:56:15,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:56:15,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:56:15,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:56:15,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:56:15,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:56:15,913 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:56:15,913 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:56:15,913 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:56:15,913 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:56:15,914 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:56:15,914 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:56:15,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:56:15,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:56:15,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:56:15,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:56:15,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:56:15,916 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:56:15,916 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:56:15,916 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:56:15,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:56:15,917 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:56:15,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:56:15,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:56:15,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:56:15,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:56:15,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:15,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:56:15,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:56:15,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:56:15,919 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:56:15,919 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:15,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:56:15,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:56:15,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:56:15,920 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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7e6c578d14a1dec94358c7d18f5f6f4b98e0f546876bd6ae577107ea9aa62ae [2022-11-03 03:56:16,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:56:16,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:56:16,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:56:16,424 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:56:16,425 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:56:16,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.c [2022-11-03 03:56:16,523 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/data/bbb3f8d7d/1771745a30064c31bc68b5940a7edaec/FLAGbf3c996a7 [2022-11-03 03:56:17,368 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:56:17,368 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.c [2022-11-03 03:56:17,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/data/bbb3f8d7d/1771745a30064c31bc68b5940a7edaec/FLAGbf3c996a7 [2022-11-03 03:56:17,523 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/data/bbb3f8d7d/1771745a30064c31bc68b5940a7edaec [2022-11-03 03:56:17,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:56:17,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:56:17,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:17,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:56:17,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:56:17,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:17" (1/1) ... [2022-11-03 03:56:17,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65026d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:17, skipping insertion in model container [2022-11-03 03:56:17,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:17" (1/1) ... [2022-11-03 03:56:17,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:56:17,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:56:17,907 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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.c[1014,1027] [2022-11-03 03:56:18,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:18,557 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:56:18,570 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_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.szymanski.1.prop1-func-interl.c[1014,1027] [2022-11-03 03:56:18,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:18,877 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:56:18,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18 WrapperNode [2022-11-03 03:56:18,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:18,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:18,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:56:18,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:56:18,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:18,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:19,130 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3977 [2022-11-03 03:56:19,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:19,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:56:19,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:56:19,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:56:19,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:19,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:19,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:19,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:19,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:19,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:19,285 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:19,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:19,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:56:19,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:56:19,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:56:19,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:56:19,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (1/1) ... [2022-11-03 03:56:19,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:19,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:19,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:56:19,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:56:19,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:56:19,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:56:20,455 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:56:20,458 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:56:24,630 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:56:24,640 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:56:24,640 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:56:24,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:24 BoogieIcfgContainer [2022-11-03 03:56:24,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:56:24,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:56:24,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:56:24,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:56:24,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:56:17" (1/3) ... [2022-11-03 03:56:24,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed5259f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:24, skipping insertion in model container [2022-11-03 03:56:24,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:18" (2/3) ... [2022-11-03 03:56:24,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed5259f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:24, skipping insertion in model container [2022-11-03 03:56:24,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:24" (3/3) ... [2022-11-03 03:56:24,653 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.szymanski.1.prop1-func-interl.c [2022-11-03 03:56:24,674 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:56:24,674 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:56:24,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:56:24,743 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;@2212c318, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:56:24,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:56:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 179 states, 177 states have (on average 1.497175141242938) internal successors, (265), 178 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:56:24,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:24,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:24,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:24,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1473645707, now seen corresponding path program 1 times [2022-11-03 03:56:24,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:24,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104712803] [2022-11-03 03:56:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:24,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:24,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:24,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:24,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:56:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:25,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:56:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:25,783 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 03:56:25,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:25,784 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:25,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104712803] [2022-11-03 03:56:25,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104712803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:25,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:25,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:25,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204823146] [2022-11-03 03:56:25,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:25,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:25,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:25,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:25,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:25,846 INFO L87 Difference]: Start difference. First operand has 179 states, 177 states have (on average 1.497175141242938) internal successors, (265), 178 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:26,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:26,415 INFO L93 Difference]: Finished difference Result 697 states and 1043 transitions. [2022-11-03 03:56:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:26,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:56:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:26,441 INFO L225 Difference]: With dead ends: 697 [2022-11-03 03:56:26,446 INFO L226 Difference]: Without dead ends: 520 [2022-11-03 03:56:26,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 03:56:26,466 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 763 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:26,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 1015 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:56:26,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-03 03:56:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 177. [2022-11-03 03:56:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.4829545454545454) internal successors, (261), 176 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 261 transitions. [2022-11-03 03:56:26,552 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 261 transitions. Word has length 11 [2022-11-03 03:56:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:26,552 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 261 transitions. [2022-11-03 03:56:26,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 261 transitions. [2022-11-03 03:56:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:56:26,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:26,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:26,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 03:56:26,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:26,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:26,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2011974963, now seen corresponding path program 1 times [2022-11-03 03:56:26,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:26,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626859091] [2022-11-03 03:56:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:26,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:26,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:26,773 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:26,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:56:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:27,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:56:27,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:27,597 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 03:56:27,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:27,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:27,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626859091] [2022-11-03 03:56:27,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626859091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:27,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:27,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:27,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512444859] [2022-11-03 03:56:27,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:27,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:27,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:27,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:27,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:27,602 INFO L87 Difference]: Start difference. First operand 177 states and 261 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:28,001 INFO L93 Difference]: Finished difference Result 693 states and 1027 transitions. [2022-11-03 03:56:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:28,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:56:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:28,006 INFO L225 Difference]: With dead ends: 693 [2022-11-03 03:56:28,007 INFO L226 Difference]: Without dead ends: 520 [2022-11-03 03:56:28,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 03:56:28,009 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 757 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:28,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 1014 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:56:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-03 03:56:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 179. [2022-11-03 03:56:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4775280898876404) internal successors, (263), 178 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 263 transitions. [2022-11-03 03:56:28,024 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 263 transitions. Word has length 11 [2022-11-03 03:56:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:28,024 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 263 transitions. [2022-11-03 03:56:28,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 263 transitions. [2022-11-03 03:56:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:56:28,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:28,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:28,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:28,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:28,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:28,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2069233265, now seen corresponding path program 1 times [2022-11-03 03:56:28,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:28,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327015814] [2022-11-03 03:56:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:28,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:28,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:28,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:28,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:56:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:29,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:56:29,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:29,109 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 03:56:29,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:29,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:29,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327015814] [2022-11-03 03:56:29,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327015814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:29,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:29,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:29,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916595101] [2022-11-03 03:56:29,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:29,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:29,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:29,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:29,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:29,114 INFO L87 Difference]: Start difference. First operand 179 states and 263 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:29,451 INFO L93 Difference]: Finished difference Result 693 states and 1026 transitions. [2022-11-03 03:56:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:29,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:56:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:29,459 INFO L225 Difference]: With dead ends: 693 [2022-11-03 03:56:29,459 INFO L226 Difference]: Without dead ends: 520 [2022-11-03 03:56:29,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 03:56:29,462 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 751 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:29,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 1016 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:56:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-03 03:56:29,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 181. [2022-11-03 03:56:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4722222222222223) internal successors, (265), 180 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 265 transitions. [2022-11-03 03:56:29,475 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 265 transitions. Word has length 11 [2022-11-03 03:56:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:29,476 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 265 transitions. [2022-11-03 03:56:29,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 265 transitions. [2022-11-03 03:56:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:56:29,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:29,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:29,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:29,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:29,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:29,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2069292847, now seen corresponding path program 1 times [2022-11-03 03:56:29,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:29,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881316300] [2022-11-03 03:56:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:29,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:29,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:29,695 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:29,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:56:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:30,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:56:30,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:31,008 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 03:56:31,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:31,009 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881316300] [2022-11-03 03:56:31,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881316300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:31,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:31,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 03:56:31,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542980778] [2022-11-03 03:56:31,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:31,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:56:31,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:56:31,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:56:31,019 INFO L87 Difference]: Start difference. First operand 181 states and 265 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:33,472 INFO L93 Difference]: Finished difference Result 717 states and 1057 transitions. [2022-11-03 03:56:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:56:33,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 03:56:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:33,476 INFO L225 Difference]: With dead ends: 717 [2022-11-03 03:56:33,477 INFO L226 Difference]: Without dead ends: 715 [2022-11-03 03:56:33,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:56:33,479 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 2278 mSDsluCounter, 2180 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2278 SdHoareTripleChecker+Valid, 2431 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:33,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2278 Valid, 2431 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 03:56:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-11-03 03:56:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 187. [2022-11-03 03:56:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.467741935483871) internal successors, (273), 186 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 273 transitions. [2022-11-03 03:56:33,491 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 273 transitions. Word has length 11 [2022-11-03 03:56:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:33,492 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 273 transitions. [2022-11-03 03:56:33,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:33,493 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 273 transitions. [2022-11-03 03:56:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:56:33,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:33,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:33,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:33,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:33,715 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:33,715 INFO L85 PathProgramCache]: Analyzing trace with hash -465634823, now seen corresponding path program 1 times [2022-11-03 03:56:33,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:33,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947804620] [2022-11-03 03:56:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:33,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:33,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:33,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:33,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:56:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:35,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:35,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:35,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:35,826 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:35,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947804620] [2022-11-03 03:56:35,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947804620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:35,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:35,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:35,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171216774] [2022-11-03 03:56:35,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:35,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:35,829 INFO L87 Difference]: Start difference. First operand 187 states and 273 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:36,306 INFO L93 Difference]: Finished difference Result 710 states and 1048 transitions. [2022-11-03 03:56:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:56:36,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:56:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:36,309 INFO L225 Difference]: With dead ends: 710 [2022-11-03 03:56:36,309 INFO L226 Difference]: Without dead ends: 531 [2022-11-03 03:56:36,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:56:36,310 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 910 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:36,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 1609 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-03 03:56:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-03 03:56:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 215. [2022-11-03 03:56:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4626168224299065) internal successors, (313), 214 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 313 transitions. [2022-11-03 03:56:36,320 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 313 transitions. Word has length 182 [2022-11-03 03:56:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:36,320 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 313 transitions. [2022-11-03 03:56:36,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 313 transitions. [2022-11-03 03:56:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:56:36,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:36,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:36,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:36,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:36,539 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1465490811, now seen corresponding path program 1 times [2022-11-03 03:56:36,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:36,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810445863] [2022-11-03 03:56:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:36,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:36,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:36,547 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:36,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:56:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:38,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:38,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:38,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:38,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810445863] [2022-11-03 03:56:38,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810445863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:38,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:38,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:38,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186822055] [2022-11-03 03:56:38,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:38,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:38,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:38,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:38,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:38,632 INFO L87 Difference]: Start difference. First operand 215 states and 313 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:38,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:38,929 INFO L93 Difference]: Finished difference Result 428 states and 628 transitions. [2022-11-03 03:56:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:38,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:56:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:38,933 INFO L225 Difference]: With dead ends: 428 [2022-11-03 03:56:38,933 INFO L226 Difference]: Without dead ends: 249 [2022-11-03 03:56:38,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:38,934 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 53 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:38,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1278 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 15 Unchecked, 0.3s Time] [2022-11-03 03:56:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-03 03:56:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-11-03 03:56:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.4596774193548387) internal successors, (362), 248 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 362 transitions. [2022-11-03 03:56:38,946 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 362 transitions. Word has length 182 [2022-11-03 03:56:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:38,947 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 362 transitions. [2022-11-03 03:56:38,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 362 transitions. [2022-11-03 03:56:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:56:38,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:38,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:39,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:39,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:39,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1881424519, now seen corresponding path program 1 times [2022-11-03 03:56:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:39,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336900711] [2022-11-03 03:56:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:39,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:39,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:39,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:39,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:56:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:41,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:41,126 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:41,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336900711] [2022-11-03 03:56:41,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336900711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:41,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:41,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:41,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057221480] [2022-11-03 03:56:41,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:41,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:41,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:41,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:41,129 INFO L87 Difference]: Start difference. First operand 249 states and 362 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:41,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:41,629 INFO L93 Difference]: Finished difference Result 760 states and 1119 transitions. [2022-11-03 03:56:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:56:41,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:56:41,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:41,633 INFO L225 Difference]: With dead ends: 760 [2022-11-03 03:56:41,633 INFO L226 Difference]: Without dead ends: 581 [2022-11-03 03:56:41,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:56:41,635 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 818 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:41,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 1643 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 20 Unchecked, 0.4s Time] [2022-11-03 03:56:41,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-11-03 03:56:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 291. [2022-11-03 03:56:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.4586206896551723) internal successors, (423), 290 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 423 transitions. [2022-11-03 03:56:41,652 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 423 transitions. Word has length 182 [2022-11-03 03:56:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:41,653 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 423 transitions. [2022-11-03 03:56:41,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:41,654 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 423 transitions. [2022-11-03 03:56:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:56:41,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:41,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:41,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:41,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:41,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1393377413, now seen corresponding path program 1 times [2022-11-03 03:56:41,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:41,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945365149] [2022-11-03 03:56:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:41,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:41,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:41,884 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:41,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:56:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:43,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:43,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:44,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:44,211 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:44,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945365149] [2022-11-03 03:56:44,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945365149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:44,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:44,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:44,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884599876] [2022-11-03 03:56:44,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:44,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:44,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:44,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:44,215 INFO L87 Difference]: Start difference. First operand 291 states and 423 transitions. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:44,558 INFO L93 Difference]: Finished difference Result 604 states and 884 transitions. [2022-11-03 03:56:44,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:44,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:56:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:44,563 INFO L225 Difference]: With dead ends: 604 [2022-11-03 03:56:44,563 INFO L226 Difference]: Without dead ends: 425 [2022-11-03 03:56:44,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:44,564 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 156 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:44,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1276 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-11-03 03:56:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-11-03 03:56:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-11-03 03:56:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.4575471698113207) internal successors, (618), 424 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 618 transitions. [2022-11-03 03:56:44,583 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 618 transitions. Word has length 182 [2022-11-03 03:56:44,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:44,585 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 618 transitions. [2022-11-03 03:56:44,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 618 transitions. [2022-11-03 03:56:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:56:44,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:44,588 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:44,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:44,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:44,809 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1633617159, now seen corresponding path program 1 times [2022-11-03 03:56:44,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:44,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678509367] [2022-11-03 03:56:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:44,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:44,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:44,813 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:44,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:56:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:46,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:56:46,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:47,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:47,164 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:47,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678509367] [2022-11-03 03:56:47,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678509367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:47,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:47,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:47,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748456446] [2022-11-03 03:56:47,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:47,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:47,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:47,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:47,167 INFO L87 Difference]: Start difference. First operand 425 states and 618 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:47,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:47,734 INFO L93 Difference]: Finished difference Result 915 states and 1345 transitions. [2022-11-03 03:56:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:56:47,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:47,739 INFO L225 Difference]: With dead ends: 915 [2022-11-03 03:56:47,739 INFO L226 Difference]: Without dead ends: 736 [2022-11-03 03:56:47,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:56:47,740 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 422 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:47,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 953 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:56:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-03 03:56:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 523. [2022-11-03 03:56:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.4636015325670497) internal successors, (764), 522 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 764 transitions. [2022-11-03 03:56:47,755 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 764 transitions. Word has length 182 [2022-11-03 03:56:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:47,756 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 764 transitions. [2022-11-03 03:56:47,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 764 transitions. [2022-11-03 03:56:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:56:47,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:47,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:47,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:47,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:47,983 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -740130821, now seen corresponding path program 1 times [2022-11-03 03:56:47,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:47,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141470394] [2022-11-03 03:56:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:47,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:47,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:47,987 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:47,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:56:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:49,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:56:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:50,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:50,475 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:50,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141470394] [2022-11-03 03:56:50,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141470394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:50,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:50,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:56:50,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711972530] [2022-11-03 03:56:50,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:50,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:50,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:50,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:50,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:50,479 INFO L87 Difference]: Start difference. First operand 523 states and 764 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:51,135 INFO L93 Difference]: Finished difference Result 1058 states and 1555 transitions. [2022-11-03 03:56:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:51,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:56:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:51,144 INFO L225 Difference]: With dead ends: 1058 [2022-11-03 03:56:51,144 INFO L226 Difference]: Without dead ends: 879 [2022-11-03 03:56:51,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:56:51,146 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 868 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:51,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 1441 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:56:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-03 03:56:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 527. [2022-11-03 03:56:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.461977186311787) internal successors, (769), 526 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 769 transitions. [2022-11-03 03:56:51,162 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 769 transitions. Word has length 182 [2022-11-03 03:56:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:51,163 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 769 transitions. [2022-11-03 03:56:51,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:51,164 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 769 transitions. [2022-11-03 03:56:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:56:51,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:51,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:51,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:51,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:51,395 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash -316484099, now seen corresponding path program 1 times [2022-11-03 03:56:51,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:51,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012455361] [2022-11-03 03:56:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:51,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:51,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:51,402 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:51,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:56:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:52,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:56:52,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:53,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:53,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:53,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012455361] [2022-11-03 03:56:53,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012455361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:53,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:53,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:56:53,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374450406] [2022-11-03 03:56:53,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:53,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:53,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:53,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:53,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:53,862 INFO L87 Difference]: Start difference. First operand 527 states and 769 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:54,474 INFO L93 Difference]: Finished difference Result 1058 states and 1554 transitions. [2022-11-03 03:56:54,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:54,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:56:54,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:54,479 INFO L225 Difference]: With dead ends: 1058 [2022-11-03 03:56:54,479 INFO L226 Difference]: Without dead ends: 879 [2022-11-03 03:56:54,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:56:54,481 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 856 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:54,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 1435 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:56:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-03 03:56:54,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 531. [2022-11-03 03:56:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.460377358490566) internal successors, (774), 530 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 774 transitions. [2022-11-03 03:56:54,496 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 774 transitions. Word has length 182 [2022-11-03 03:56:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:54,496 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 774 transitions. [2022-11-03 03:56:54,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:54,497 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 774 transitions. [2022-11-03 03:56:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:56:54,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:54,499 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:54,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:54,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:54,714 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:54,714 INFO L85 PathProgramCache]: Analyzing trace with hash 343047423, now seen corresponding path program 1 times [2022-11-03 03:56:54,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:54,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007548852] [2022-11-03 03:56:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:54,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:54,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:54,718 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:54,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:56:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:56,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:56:56,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:57,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:57,152 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007548852] [2022-11-03 03:56:57,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007548852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:57,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:57,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:56:57,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224236600] [2022-11-03 03:56:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:57,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:57,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:57,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:57,154 INFO L87 Difference]: Start difference. First operand 531 states and 774 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:57,823 INFO L93 Difference]: Finished difference Result 1070 states and 1571 transitions. [2022-11-03 03:56:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:57,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:56:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:57,828 INFO L225 Difference]: With dead ends: 1070 [2022-11-03 03:56:57,829 INFO L226 Difference]: Without dead ends: 891 [2022-11-03 03:56:57,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:56:57,830 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 855 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:57,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1434 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:56:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-03 03:56:57,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 539. [2022-11-03 03:56:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.4591078066914498) internal successors, (785), 538 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 785 transitions. [2022-11-03 03:56:57,845 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 785 transitions. Word has length 182 [2022-11-03 03:56:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:57,846 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 785 transitions. [2022-11-03 03:56:57,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 785 transitions. [2022-11-03 03:56:57,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:56:57,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:57,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:57,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:58,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:58,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1729250817, now seen corresponding path program 1 times [2022-11-03 03:56:58,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:58,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165697009] [2022-11-03 03:56:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:58,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:58,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:58,074 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:58,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:56:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:59,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:56:59,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:00,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:00,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:00,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165697009] [2022-11-03 03:57:00,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165697009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:00,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:00,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:57:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57851640] [2022-11-03 03:57:00,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:00,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:57:00,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:57:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:57:00,585 INFO L87 Difference]: Start difference. First operand 539 states and 785 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:01,241 INFO L93 Difference]: Finished difference Result 1070 states and 1570 transitions. [2022-11-03 03:57:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:57:01,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:57:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:01,247 INFO L225 Difference]: With dead ends: 1070 [2022-11-03 03:57:01,248 INFO L226 Difference]: Without dead ends: 891 [2022-11-03 03:57:01,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:57:01,249 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 843 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:01,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 1428 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:57:01,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-03 03:57:01,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 543. [2022-11-03 03:57:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 1.4575645756457565) internal successors, (790), 542 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 790 transitions. [2022-11-03 03:57:01,265 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 790 transitions. Word has length 182 [2022-11-03 03:57:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:01,266 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 790 transitions. [2022-11-03 03:57:01,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 790 transitions. [2022-11-03 03:57:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:57:01,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:01,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:01,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-03 03:57:01,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:01,495 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:01,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:01,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1869799427, now seen corresponding path program 1 times [2022-11-03 03:57:01,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:01,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914375336] [2022-11-03 03:57:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:01,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:01,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:01,499 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:01,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:57:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:02,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:57:02,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:03,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:03,902 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914375336] [2022-11-03 03:57:03,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914375336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:03,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:03,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:57:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471777183] [2022-11-03 03:57:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:57:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:57:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:57:03,905 INFO L87 Difference]: Start difference. First operand 543 states and 790 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:04,429 INFO L93 Difference]: Finished difference Result 915 states and 1340 transitions. [2022-11-03 03:57:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:57:04,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:57:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:04,435 INFO L225 Difference]: With dead ends: 915 [2022-11-03 03:57:04,435 INFO L226 Difference]: Without dead ends: 736 [2022-11-03 03:57:04,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 03:57:04,436 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 357 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:04,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 948 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:57:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-03 03:57:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 547. [2022-11-03 03:57:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.456043956043956) internal successors, (795), 546 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 795 transitions. [2022-11-03 03:57:04,451 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 795 transitions. Word has length 182 [2022-11-03 03:57:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:04,452 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 795 transitions. [2022-11-03 03:57:04,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 795 transitions. [2022-11-03 03:57:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:57:04,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:04,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:04,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:04,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:04,671 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:04,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2002466043, now seen corresponding path program 1 times [2022-11-03 03:57:04,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:04,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345418741] [2022-11-03 03:57:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:04,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:04,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:04,676 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:04,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:57:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:06,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:57:06,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:07,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:07,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:07,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345418741] [2022-11-03 03:57:07,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345418741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:07,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:07,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:57:07,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133958055] [2022-11-03 03:57:07,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:07,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:57:07,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:07,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:57:07,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:57:07,139 INFO L87 Difference]: Start difference. First operand 547 states and 795 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:07,776 INFO L93 Difference]: Finished difference Result 1082 states and 1586 transitions. [2022-11-03 03:57:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:57:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:57:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:07,781 INFO L225 Difference]: With dead ends: 1082 [2022-11-03 03:57:07,781 INFO L226 Difference]: Without dead ends: 903 [2022-11-03 03:57:07,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:57:07,783 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 839 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:07,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 1430 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:57:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-03 03:57:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 551. [2022-11-03 03:57:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.4545454545454546) internal successors, (800), 550 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 800 transitions. [2022-11-03 03:57:07,799 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 800 transitions. Word has length 182 [2022-11-03 03:57:07,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:07,800 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 800 transitions. [2022-11-03 03:57:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 800 transitions. [2022-11-03 03:57:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:57:07,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:07,803 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:07,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:08,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:08,023 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash 704153351, now seen corresponding path program 1 times [2022-11-03 03:57:08,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:08,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125541187] [2022-11-03 03:57:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:08,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:08,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:08,028 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:08,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:57:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:09,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:57:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:10,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:10,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:10,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125541187] [2022-11-03 03:57:10,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125541187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:10,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:10,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:57:10,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340625329] [2022-11-03 03:57:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:10,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:57:10,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:10,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:57:10,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:57:10,627 INFO L87 Difference]: Start difference. First operand 551 states and 800 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:11,365 INFO L93 Difference]: Finished difference Result 910 states and 1331 transitions. [2022-11-03 03:57:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:57:11,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:57:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:11,370 INFO L225 Difference]: With dead ends: 910 [2022-11-03 03:57:11,370 INFO L226 Difference]: Without dead ends: 731 [2022-11-03 03:57:11,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:57:11,372 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 586 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:11,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 1091 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:57:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-11-03 03:57:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 553. [2022-11-03 03:57:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.4528985507246377) internal successors, (802), 552 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 802 transitions. [2022-11-03 03:57:11,386 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 802 transitions. Word has length 182 [2022-11-03 03:57:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:11,386 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 802 transitions. [2022-11-03 03:57:11,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 802 transitions. [2022-11-03 03:57:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:57:11,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:11,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:11,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:11,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:11,607 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:11,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1984017029, now seen corresponding path program 1 times [2022-11-03 03:57:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:11,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557701031] [2022-11-03 03:57:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:11,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:11,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:11,611 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:11,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:57:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:13,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:57:13,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:14,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:14,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:14,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557701031] [2022-11-03 03:57:14,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557701031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:14,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:14,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:57:14,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665374391] [2022-11-03 03:57:14,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:14,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:57:14,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:14,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:57:14,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:57:14,195 INFO L87 Difference]: Start difference. First operand 553 states and 802 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:14,819 INFO L93 Difference]: Finished difference Result 1082 states and 1584 transitions. [2022-11-03 03:57:14,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:57:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:57:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:14,823 INFO L225 Difference]: With dead ends: 1082 [2022-11-03 03:57:14,824 INFO L226 Difference]: Without dead ends: 903 [2022-11-03 03:57:14,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 03:57:14,825 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 825 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:14,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 1423 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:57:14,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-03 03:57:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 555. [2022-11-03 03:57:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4512635379061372) internal successors, (804), 554 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 804 transitions. [2022-11-03 03:57:14,844 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 804 transitions. Word has length 182 [2022-11-03 03:57:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:14,845 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 804 transitions. [2022-11-03 03:57:14,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 804 transitions. [2022-11-03 03:57:14,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:57:14,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:14,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:14,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:15,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:15,063 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:15,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1397211015, now seen corresponding path program 1 times [2022-11-03 03:57:15,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:15,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956962045] [2022-11-03 03:57:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:15,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:15,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:15,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:15,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:57:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:57:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:18,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:19,738 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:19,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956962045] [2022-11-03 03:57:19,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956962045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:19,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1260617550] [2022-11-03 03:57:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:19,739 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:19,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:57:19,745 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:57:19,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 03:57:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:57:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:24,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:25,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1260617550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:25,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655546003] [2022-11-03 03:57:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:25,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:25,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:25,166 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:25,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 03:57:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:26,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:57:26,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:28,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:29,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655546003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:29,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:29,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 03:57:29,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475819832] [2022-11-03 03:57:29,705 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:29,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 03:57:29,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 03:57:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-03 03:57:29,708 INFO L87 Difference]: Start difference. First operand 555 states and 804 transitions. Second operand has 28 states, 28 states have (on average 25.25) internal successors, (707), 28 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:30,653 INFO L93 Difference]: Finished difference Result 972 states and 1409 transitions. [2022-11-03 03:57:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:57:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 25.25) internal successors, (707), 28 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:57:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:30,656 INFO L225 Difference]: With dead ends: 972 [2022-11-03 03:57:30,657 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 03:57:30,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1060 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:57:30,659 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 1077 mSDsluCounter, 3327 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 3578 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:30,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 3578 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-11-03 03:57:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 03:57:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 790. [2022-11-03 03:57:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 1.443599493029151) internal successors, (1139), 789 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1139 transitions. [2022-11-03 03:57:30,680 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1139 transitions. Word has length 182 [2022-11-03 03:57:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:30,681 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 1139 transitions. [2022-11-03 03:57:30,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 25.25) internal successors, (707), 28 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1139 transitions. [2022-11-03 03:57:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:57:30,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:30,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:30,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:30,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:31,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:31,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:31,305 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:31,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:31,305 INFO L85 PathProgramCache]: Analyzing trace with hash 587864389, now seen corresponding path program 1 times [2022-11-03 03:57:31,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:31,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255295552] [2022-11-03 03:57:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:31,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:31,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:31,310 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:31,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:57:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:32,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:57:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:35,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255295552] [2022-11-03 03:57:35,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255295552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [71135992] [2022-11-03 03:57:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:35,485 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:57:35,486 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:57:35,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 03:57:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:38,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:57:38,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:39,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:40,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [71135992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:40,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722424483] [2022-11-03 03:57:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:40,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:40,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:40,541 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:40,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 03:57:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:41,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:57:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:42,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:43,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722424483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:43,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:43,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:57:43,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344187890] [2022-11-03 03:57:43,829 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:43,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:57:43,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:43,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:57:43,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:57:43,834 INFO L87 Difference]: Start difference. First operand 790 states and 1139 transitions. Second operand has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 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 03:57:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:44,487 INFO L93 Difference]: Finished difference Result 1152 states and 1666 transitions. [2022-11-03 03:57:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:57:44,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 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) Word has length 182 [2022-11-03 03:57:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:44,520 INFO L225 Difference]: With dead ends: 1152 [2022-11-03 03:57:44,520 INFO L226 Difference]: Without dead ends: 973 [2022-11-03 03:57:44,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1093 GetRequests, 1069 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:57:44,521 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 608 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:44,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 2232 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 32 Unchecked, 0.4s Time] [2022-11-03 03:57:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-11-03 03:57:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 973. [2022-11-03 03:57:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.4393004115226338) internal successors, (1399), 972 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1399 transitions. [2022-11-03 03:57:44,561 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1399 transitions. Word has length 182 [2022-11-03 03:57:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:44,562 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1399 transitions. [2022-11-03 03:57:44,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.4375) internal successors, (359), 16 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 03:57:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1399 transitions. [2022-11-03 03:57:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:57:44,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:44,566 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:44,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:44,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:45,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:45,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:45,189 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 645122691, now seen corresponding path program 1 times [2022-11-03 03:57:45,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:45,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133932726] [2022-11-03 03:57:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:45,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:45,195 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:45,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:57:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:57:46,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:48,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:49,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:49,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133932726] [2022-11-03 03:57:49,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133932726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:49,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2053587120] [2022-11-03 03:57:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:49,221 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:49,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:57:49,223 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:57:49,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-03 03:57:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:52,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:57:52,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:53,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:53,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2053587120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359123829] [2022-11-03 03:57:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:53,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:53,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:53,984 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:53,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 03:57:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:57:55,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:56,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:57,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359123829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:57,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:57,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 03:57:57,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301141341] [2022-11-03 03:57:57,188 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:57,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:57:57,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:57:57,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:57:57,190 INFO L87 Difference]: Start difference. First operand 973 states and 1399 transitions. Second operand has 16 states, 16 states have (on average 22.5625) internal successors, (361), 16 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:57,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:57,664 INFO L93 Difference]: Finished difference Result 1617 states and 2327 transitions. [2022-11-03 03:57:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:57:57,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.5625) internal successors, (361), 16 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:57:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:57,668 INFO L225 Difference]: With dead ends: 1617 [2022-11-03 03:57:57,668 INFO L226 Difference]: Without dead ends: 1438 [2022-11-03 03:57:57,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1089 GetRequests, 1068 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:57:57,670 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 357 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:57,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 2412 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-11-03 03:57:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-11-03 03:57:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1438. [2022-11-03 03:57:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 1.4335421016005567) internal successors, (2060), 1437 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2060 transitions. [2022-11-03 03:57:57,707 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2060 transitions. Word has length 182 [2022-11-03 03:57:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:57,707 INFO L495 AbstractCegarLoop]: Abstraction has 1438 states and 2060 transitions. [2022-11-03 03:57:57,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.5625) internal successors, (361), 16 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2060 transitions. [2022-11-03 03:57:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:57:57,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:57,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:57,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:57,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:58,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:58,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:58,327 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash -637049595, now seen corresponding path program 1 times [2022-11-03 03:57:58,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:58,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156503644] [2022-11-03 03:57:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:58,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:58,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:58,331 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:58,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:57:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:59,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:57:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:02,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:07,389 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:58:07,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156503644] [2022-11-03 03:58:07,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156503644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:07,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1371552025] [2022-11-03 03:58:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:07,390 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:07,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:58:07,391 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:58:07,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 03:58:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:10,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:58:10,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:13,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:24,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1371552025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:24,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083427022] [2022-11-03 03:58:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:24,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:24,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:24,287 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:24,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 03:58:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:58:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:29,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:36,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083427022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:36,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:58:36,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 03:58:36,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92864623] [2022-11-03 03:58:36,895 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:36,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 03:58:36,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:58:36,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 03:58:36,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2009, Unknown=1, NotChecked=0, Total=2256 [2022-11-03 03:58:36,898 INFO L87 Difference]: Start difference. First operand 1438 states and 2060 transitions. Second operand has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:40,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:40,828 INFO L93 Difference]: Finished difference Result 2807 states and 4024 transitions. [2022-11-03 03:58:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:58:40,829 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:58:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:40,837 INFO L225 Difference]: With dead ends: 2807 [2022-11-03 03:58:40,837 INFO L226 Difference]: Without dead ends: 2805 [2022-11-03 03:58:40,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1047 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=573, Invalid=3982, Unknown=1, NotChecked=0, Total=4556 [2022-11-03 03:58:40,840 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 1030 mSDsluCounter, 6580 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 6813 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:40,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 6813 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-11-03 03:58:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-11-03 03:58:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2786. [2022-11-03 03:58:40,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2785 states have (on average 1.435906642728905) internal successors, (3999), 2785 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 3999 transitions. [2022-11-03 03:58:40,911 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 3999 transitions. Word has length 182 [2022-11-03 03:58:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:40,911 INFO L495 AbstractCegarLoop]: Abstraction has 2786 states and 3999 transitions. [2022-11-03 03:58:40,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:40,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 3999 transitions. [2022-11-03 03:58:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:58:40,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:40,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:40,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:41,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:41,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-03 03:58:41,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:41,543 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1629331591, now seen corresponding path program 1 times [2022-11-03 03:58:41,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:58:41,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592966345] [2022-11-03 03:58:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:41,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:58:41,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:58:41,547 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:58:41,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:58:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:42,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:58:42,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:45,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:51,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:58:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592966345] [2022-11-03 03:58:51,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592966345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1380764619] [2022-11-03 03:58:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:51,464 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:51,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:58:51,465 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:58:51,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 03:58:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:54,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:58:54,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:58,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:12,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1380764619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571165554] [2022-11-03 03:59:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:12,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:12,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:12,997 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:12,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 03:59:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:14,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:59:14,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:59:17,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:59:24,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571165554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:24,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:59:24,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 03:59:24,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838444808] [2022-11-03 03:59:24,869 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:24,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 03:59:24,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:24,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 03:59:24,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2006, Unknown=4, NotChecked=0, Total=2256 [2022-11-03 03:59:24,873 INFO L87 Difference]: Start difference. First operand 2786 states and 3999 transitions. Second operand has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:28,748 INFO L93 Difference]: Finished difference Result 3677 states and 5197 transitions. [2022-11-03 03:59:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:59:28,749 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 03:59:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:28,764 INFO L225 Difference]: With dead ends: 3677 [2022-11-03 03:59:28,764 INFO L226 Difference]: Without dead ends: 3675 [2022-11-03 03:59:28,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 1047 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=573, Invalid=3979, Unknown=4, NotChecked=0, Total=4556 [2022-11-03 03:59:28,768 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 1223 mSDsluCounter, 6010 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 6243 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:28,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 6243 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-11-03 03:59:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2022-11-03 03:59:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3638. [2022-11-03 03:59:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 1.4162771514984878) internal successors, (5151), 3637 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 5151 transitions. [2022-11-03 03:59:28,874 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 5151 transitions. Word has length 182 [2022-11-03 03:59:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:28,876 INFO L495 AbstractCegarLoop]: Abstraction has 3638 states and 5151 transitions. [2022-11-03 03:59:28,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 5151 transitions. [2022-11-03 03:59:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 03:59:28,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:28,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:59:28,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:29,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:29,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:59:29,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:59:29,502 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:29,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1613812873, now seen corresponding path program 1 times [2022-11-03 03:59:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:59:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891757421] [2022-11-03 03:59:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:29,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:59:29,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:59:29,506 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:59:29,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:59:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:30,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:59:30,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:59:34,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:59:39,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:59:39,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891757421] [2022-11-03 03:59:39,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891757421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:39,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657686825] [2022-11-03 03:59:39,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:39,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:59:39,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:59:39,928 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:59:39,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 03:59:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:59:42,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:46,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:05,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1657686825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:05,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735175598] [2022-11-03 04:00:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:05,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:05,805 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:05,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 04:00:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:07,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:00:07,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:00:11,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:00:20,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735175598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:20,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:00:20,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 04:00:20,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394704620] [2022-11-03 04:00:20,169 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:00:20,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 04:00:20,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 04:00:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2008, Unknown=2, NotChecked=0, Total=2256 [2022-11-03 04:00:20,173 INFO L87 Difference]: Start difference. First operand 3638 states and 5151 transitions. Second operand has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:26,412 INFO L93 Difference]: Finished difference Result 6129 states and 8605 transitions. [2022-11-03 04:00:26,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 04:00:26,413 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 04:00:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:26,430 INFO L225 Difference]: With dead ends: 6129 [2022-11-03 04:00:26,430 INFO L226 Difference]: Without dead ends: 6127 [2022-11-03 04:00:26,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 1046 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=588, Invalid=4240, Unknown=2, NotChecked=0, Total=4830 [2022-11-03 04:00:26,434 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 1600 mSDsluCounter, 7146 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 7379 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:26,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1600 Valid, 7379 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2022-11-03 04:00:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6127 states. [2022-11-03 04:00:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6127 to 5915. [2022-11-03 04:00:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5915 states, 5914 states have (on average 1.4044639837673318) internal successors, (8306), 5914 states have internal predecessors, (8306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5915 states to 5915 states and 8306 transitions. [2022-11-03 04:00:26,670 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 8306 transitions. Word has length 182 [2022-11-03 04:00:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:26,671 INFO L495 AbstractCegarLoop]: Abstraction has 5915 states and 8306 transitions. [2022-11-03 04:00:26,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:26,672 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 8306 transitions. [2022-11-03 04:00:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 04:00:26,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:26,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:26,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:26,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:27,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:27,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:00:27,303 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:27,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2057713547, now seen corresponding path program 1 times [2022-11-03 04:00:27,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:27,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193289223] [2022-11-03 04:00:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:27,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:27,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:27,308 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:27,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 04:00:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 04:00:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:00:33,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:00:41,196 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:41,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193289223] [2022-11-03 04:00:41,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193289223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:41,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1191578108] [2022-11-03 04:00:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:41,197 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:00:41,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:00:41,198 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:00:41,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 04:00:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:44,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 04:00:44,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:50,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:09,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1191578108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:09,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99200372] [2022-11-03 04:01:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:09,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:09,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:09,424 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:09,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 04:01:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:10,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:01:10,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:15,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:25,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99200372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:25,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:25,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 48 [2022-11-03 04:01:25,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69751279] [2022-11-03 04:01:25,325 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:25,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 04:01:25,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 04:01:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2006, Unknown=4, NotChecked=0, Total=2256 [2022-11-03 04:01:25,338 INFO L87 Difference]: Start difference. First operand 5915 states and 8306 transitions. Second operand has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:30,927 INFO L93 Difference]: Finished difference Result 10715 states and 14941 transitions. [2022-11-03 04:01:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 04:01:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-03 04:01:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:30,947 INFO L225 Difference]: With dead ends: 10715 [2022-11-03 04:01:30,947 INFO L226 Difference]: Without dead ends: 10713 [2022-11-03 04:01:30,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1114 GetRequests, 1048 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=573, Invalid=3979, Unknown=4, NotChecked=0, Total=4556 [2022-11-03 04:01:30,952 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 1425 mSDsluCounter, 6181 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 6414 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:30,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1425 Valid, 6414 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-11-03 04:01:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10713 states. [2022-11-03 04:01:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10713 to 10243. [2022-11-03 04:01:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10243 states, 10242 states have (on average 1.3936731107205624) internal successors, (14274), 10242 states have internal predecessors, (14274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10243 states to 10243 states and 14274 transitions. [2022-11-03 04:01:31,388 INFO L78 Accepts]: Start accepts. Automaton has 10243 states and 14274 transitions. Word has length 182 [2022-11-03 04:01:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:31,389 INFO L495 AbstractCegarLoop]: Abstraction has 10243 states and 14274 transitions. [2022-11-03 04:01:31,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 22.458333333333332) internal successors, (1078), 48 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 10243 states and 14274 transitions. [2022-11-03 04:01:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 04:01:31,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:31,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:31,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:31,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-03 04:01:31,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:32,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:32,019 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1375420147, now seen corresponding path program 1 times [2022-11-03 04:01:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:32,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799156501] [2022-11-03 04:01:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:32,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:32,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:32,024 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:32,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 04:01:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:33,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 04:01:33,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:38,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:46,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:46,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799156501] [2022-11-03 04:01:46,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799156501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:46,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2117536607] [2022-11-03 04:01:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:46,382 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:46,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:46,383 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:46,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba77f07c-5ed0-4860-aac7-afa05ac1ebbe/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 04:01:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:49,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 3398 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 04:01:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:55,556 INFO L328 TraceCheckSpWp]: Computing backward predicates...