./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/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_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/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_296da2a3-62b0-4eb0-9576-dd2f9693982c/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 00dd9581d22f64efd69082a191ec7029f41a290244aef7e9060b3ab5ce6080c4 --- 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 03:42:08,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:42:08,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:42:08,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:42:08,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:42:08,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:42:08,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:42:08,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:42:08,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:42:08,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:42:08,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:42:08,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:42:08,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:42:08,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:42:08,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:42:08,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:42:08,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:42:08,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:42:08,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:42:08,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:42:08,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:42:08,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:42:08,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:42:08,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:42:08,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:42:08,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:42:08,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:42:08,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:42:08,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:42:08,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:42:08,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:42:08,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:42:08,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:42:08,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:42:08,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:42:08,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:42:08,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:42:08,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:42:08,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:42:08,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:42:08,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:42:08,592 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:42:08,640 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:42:08,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:42:08,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:42:08,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:42:08,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:42:08,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:42:08,647 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:42:08,647 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:42:08,647 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:42:08,647 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:42:08,649 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:42:08,649 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:42:08,649 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:42:08,650 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:42:08,650 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:42:08,650 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:42:08,651 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:42:08,651 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:42:08,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:42:08,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:42:08,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:42:08,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:42:08,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:42:08,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:42:08,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:42:08,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:42:08,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:42:08,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:42:08,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:42:08,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:42:08,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:42:08,655 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:42:08,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:42:08,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:42:08,656 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:42:08,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:42:08,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:42:08,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:42:08,657 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_296da2a3-62b0-4eb0-9576-dd2f9693982c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00dd9581d22f64efd69082a191ec7029f41a290244aef7e9060b3ab5ce6080c4 [2022-11-03 03:42:09,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:42:09,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:42:09,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:42:09,114 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:42:09,115 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:42:09,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c [2022-11-03 03:42:09,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/data/b3dfcc308/cca0e5d828e2495aa308e906b221ce7d/FLAG6e5c85619 [2022-11-03 03:42:09,984 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:42:09,985 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c [2022-11-03 03:42:10,002 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/data/b3dfcc308/cca0e5d828e2495aa308e906b221ce7d/FLAG6e5c85619 [2022-11-03 03:42:10,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/data/b3dfcc308/cca0e5d828e2495aa308e906b221ce7d [2022-11-03 03:42:10,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:42:10,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:42:10,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:42:10,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:42:10,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:42:10,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:42:10" (1/1) ... [2022-11-03 03:42:10,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab3bb4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:10, skipping insertion in model container [2022-11-03 03:42:10,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:42:10" (1/1) ... [2022-11-03 03:42:10,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:42:10,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:42:10,671 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_296da2a3-62b0-4eb0-9576-dd2f9693982c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c[1014,1027] [2022-11-03 03:42:11,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:42:11,045 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:42:11,069 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_296da2a3-62b0-4eb0-9576-dd2f9693982c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c[1014,1027] [2022-11-03 03:42:11,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:42:11,387 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:42:11,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11 WrapperNode [2022-11-03 03:42:11,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:42:11,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:42:11,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:42:11,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:42:11,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,652 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1661 [2022-11-03 03:42:11,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:42:11,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:42:11,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:42:11,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:42:11,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,887 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:42:11,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:42:11,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:42:11,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:42:11,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (1/1) ... [2022-11-03 03:42:11,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:42:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:11,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:42:11,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:42:12,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:42:12,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:42:12,695 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:42:12,698 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:43:41,344 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:43:56,296 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:43:56,296 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:43:56,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:56 BoogieIcfgContainer [2022-11-03 03:43:56,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:43:56,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:43:56,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:43:56,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:43:56,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:42:10" (1/3) ... [2022-11-03 03:43:56,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b6e06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:56, skipping insertion in model container [2022-11-03 03:43:56,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:42:11" (2/3) ... [2022-11-03 03:43:56,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b6e06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:56, skipping insertion in model container [2022-11-03 03:43:56,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:56" (3/3) ... [2022-11-03 03:43:56,319 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.krebs.3.prop1-func-interl.c [2022-11-03 03:43:56,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:43:56,342 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:43:56,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:43:56,433 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;@4278a666, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:43:56,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:43:56,443 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 03:43:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:43:56,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:56,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:43:56,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:56,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash 11211444, now seen corresponding path program 1 times [2022-11-03 03:43:56,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:56,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933938091] [2022-11-03 03:43:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:56,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:43:57,080 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:43:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:43:57,454 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:43:57,456 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:43:57,458 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:43:57,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:43:57,466 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:43:57,472 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:43:57,514 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:43:57,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:43:57 BoogieIcfgContainer [2022-11-03 03:43:57,540 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:43:57,542 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:43:57,543 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:43:57,543 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:43:57,545 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:56" (3/4) ... [2022-11-03 03:43:57,549 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:43:57,549 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:43:57,551 INFO L158 Benchmark]: Toolchain (without parser) took 107316.70ms. Allocated memory was 104.9MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 61.1MB in the beginning and 937.9MB in the end (delta: -876.8MB). Peak memory consumption was 705.3MB. Max. memory is 16.1GB. [2022-11-03 03:43:57,552 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 104.9MB. Free memory is still 79.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:43:57,554 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1152.93ms. Allocated memory was 104.9MB in the beginning and 169.9MB in the end (delta: 65.0MB). Free memory was 60.9MB in the beginning and 132.2MB in the end (delta: -71.3MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB. [2022-11-03 03:43:57,556 INFO L158 Benchmark]: Boogie Procedure Inliner took 263.47ms. Allocated memory is still 169.9MB. Free memory was 132.2MB in the beginning and 99.4MB in the end (delta: 32.8MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2022-11-03 03:43:57,563 INFO L158 Benchmark]: Boogie Preprocessor took 275.73ms. Allocated memory is still 169.9MB. Free memory was 99.4MB in the beginning and 113.2MB in the end (delta: -13.8MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. [2022-11-03 03:43:57,564 INFO L158 Benchmark]: RCFGBuilder took 104368.71ms. Allocated memory was 169.9MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 113.2MB in the beginning and 1.0GB in the end (delta: -892.9MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2022-11-03 03:43:57,566 INFO L158 Benchmark]: TraceAbstraction took 1237.83ms. Allocated memory is still 1.7GB. Free memory was 1.0GB in the beginning and 938.9MB in the end (delta: 66.1MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. [2022-11-03 03:43:57,567 INFO L158 Benchmark]: Witness Printer took 6.72ms. Allocated memory is still 1.7GB. Free memory was 938.9MB in the beginning and 937.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:43:57,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 104.9MB. Free memory is still 79.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1152.93ms. Allocated memory was 104.9MB in the beginning and 169.9MB in the end (delta: 65.0MB). Free memory was 60.9MB in the beginning and 132.2MB in the end (delta: -71.3MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 263.47ms. Allocated memory is still 169.9MB. Free memory was 132.2MB in the beginning and 99.4MB in the end (delta: 32.8MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 275.73ms. Allocated memory is still 169.9MB. Free memory was 99.4MB in the beginning and 113.2MB in the end (delta: -13.8MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. * RCFGBuilder took 104368.71ms. Allocated memory was 169.9MB in the beginning and 1.7GB in the end (delta: 1.5GB). Free memory was 113.2MB in the beginning and 1.0GB in the end (delta: -892.9MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * TraceAbstraction took 1237.83ms. Allocated memory is still 1.7GB. Free memory was 1.0GB in the beginning and 938.9MB in the end (delta: 66.1MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. * Witness Printer took 6.72ms. Allocated memory is still 1.7GB. Free memory was 938.9MB in the beginning and 937.9MB in the end (delta: 1.0MB). 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 210, overapproximation of bitwiseOr at line 205, overapproximation of bitwiseAnd at line 172. 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_3 var_75 = 0; [L40] const SORT_4 var_77 = 50; [L41] const SORT_2 var_81 = 10; [L42] const SORT_4 var_85 = 1; [L43] const SORT_2 var_91 = 4; [L44] const SORT_4 var_93 = 2; [L45] const SORT_2 var_117 = 12; [L46] const SORT_2 var_140 = 2; [L47] const SORT_2 var_181 = 15; [L49] SORT_1 input_82; [L50] SORT_1 input_92; [L51] SORT_1 input_98; [L52] SORT_1 input_122; [L53] SORT_1 input_125; [L54] SORT_1 input_126; [L55] SORT_1 input_127; [L56] SORT_1 input_128; [L57] SORT_1 input_147; [L58] SORT_1 input_148; [L59] SORT_1 input_170; [L60] SORT_1 input_174; [L61] SORT_1 input_216; [L62] SORT_1 input_219; [L63] SORT_1 input_240; [L64] SORT_1 input_261; [L66] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L67] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L68] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L69] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L70] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L71] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L72] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L73] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L74] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L75] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L76] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L77] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L78] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L88] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L89] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L90] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L91] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L92] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L93] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L94] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L95] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L96] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L97] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L98] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L99] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L101] SORT_2 init_7_arg_1 = var_5; [L102] state_6 = init_7_arg_1 [L103] SORT_2 init_9_arg_1 = var_5; [L104] state_8 = init_9_arg_1 [L105] SORT_2 init_11_arg_1 = var_5; [L106] state_10 = init_11_arg_1 [L107] SORT_2 init_13_arg_1 = var_5; [L108] state_12 = init_13_arg_1 [L109] SORT_2 init_15_arg_1 = var_5; [L110] state_14 = init_15_arg_1 [L111] SORT_2 init_17_arg_1 = var_5; [L112] state_16 = init_17_arg_1 [L113] SORT_2 init_19_arg_1 = var_5; [L114] state_18 = init_19_arg_1 [L115] SORT_2 init_21_arg_1 = var_5; [L116] state_20 = init_21_arg_1 [L117] SORT_2 init_23_arg_1 = var_5; [L118] state_22 = init_23_arg_1 [L119] SORT_2 init_25_arg_1 = var_5; [L120] state_24 = init_25_arg_1 [L121] SORT_2 init_27_arg_1 = var_5; [L122] state_26 = init_27_arg_1 [L123] SORT_2 init_29_arg_1 = var_5; [L124] state_28 = init_29_arg_1 [L125] SORT_1 init_32_arg_1 = var_30; [L126] state_31 = init_32_arg_1 [L127] SORT_1 init_34_arg_1 = var_30; [L128] state_33 = init_34_arg_1 [L129] SORT_1 init_36_arg_1 = var_30; [L130] state_35 = init_36_arg_1 [L131] SORT_1 init_38_arg_1 = var_30; [L132] state_37 = init_38_arg_1 [L133] SORT_1 init_40_arg_1 = var_30; [L134] state_39 = init_40_arg_1 [L135] SORT_1 init_42_arg_1 = var_30; [L136] state_41 = init_42_arg_1 [L137] SORT_1 init_44_arg_1 = var_30; [L138] state_43 = init_44_arg_1 [L139] SORT_1 init_46_arg_1 = var_30; [L140] state_45 = init_46_arg_1 [L141] SORT_1 init_48_arg_1 = var_30; [L142] state_47 = init_48_arg_1 [L143] SORT_1 init_50_arg_1 = var_30; [L144] state_49 = init_50_arg_1 [L145] SORT_1 init_52_arg_1 = var_30; [L146] state_51 = init_52_arg_1 [L147] SORT_1 init_54_arg_1 = var_30; [L148] state_53 = init_54_arg_1 [L149] SORT_1 init_56_arg_1 = var_30; [L150] state_55 = init_56_arg_1 [L151] SORT_1 init_58_arg_1 = var_30; [L152] state_57 = init_58_arg_1 [L153] SORT_1 init_60_arg_1 = var_30; [L154] state_59 = init_60_arg_1 [L155] SORT_1 init_62_arg_1 = var_30; [L156] state_61 = init_62_arg_1 [L157] SORT_1 init_64_arg_1 = var_30; [L158] state_63 = init_64_arg_1 [L159] SORT_1 init_66_arg_1 = var_30; [L160] state_65 = init_66_arg_1 [L161] SORT_1 init_68_arg_1 = var_30; [L162] state_67 = init_68_arg_1 [L163] SORT_1 init_70_arg_1 = var_30; [L164] state_69 = init_70_arg_1 [L165] SORT_1 init_72_arg_1 = var_30; [L166] state_71 = init_72_arg_1 [L167] SORT_1 init_74_arg_1 = var_30; [L168] state_73 = init_74_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_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_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_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_8=0, var_117=12, var_140=2, var_181=15, var_30=0, var_5=0, var_75=0, var_77=50, var_81=10, var_85=1, var_91=4, var_93=2] [L171] input_82 = __VERIFIER_nondet_uchar() [L172] input_82 = input_82 & mask_SORT_1 [L173] input_92 = __VERIFIER_nondet_uchar() [L174] input_92 = input_92 & mask_SORT_1 [L175] input_98 = __VERIFIER_nondet_uchar() [L176] input_98 = input_98 & mask_SORT_1 [L177] input_122 = __VERIFIER_nondet_uchar() [L178] input_122 = input_122 & mask_SORT_1 [L179] input_125 = __VERIFIER_nondet_uchar() [L180] input_125 = input_125 & mask_SORT_1 [L181] input_126 = __VERIFIER_nondet_uchar() [L182] input_126 = input_126 & mask_SORT_1 [L183] input_127 = __VERIFIER_nondet_uchar() [L184] input_127 = input_127 & mask_SORT_1 [L185] input_128 = __VERIFIER_nondet_uchar() [L186] input_128 = input_128 & mask_SORT_1 [L187] input_147 = __VERIFIER_nondet_uchar() [L188] input_147 = input_147 & mask_SORT_1 [L189] input_148 = __VERIFIER_nondet_uchar() [L190] input_148 = input_148 & mask_SORT_1 [L191] input_170 = __VERIFIER_nondet_uchar() [L192] input_170 = input_170 & mask_SORT_1 [L193] input_174 = __VERIFIER_nondet_uchar() [L194] input_174 = input_174 & mask_SORT_1 [L195] input_216 = __VERIFIER_nondet_uchar() [L196] input_216 = input_216 & mask_SORT_1 [L197] input_219 = __VERIFIER_nondet_uchar() [L198] input_219 = input_219 & mask_SORT_1 [L199] input_240 = __VERIFIER_nondet_uchar() [L200] input_261 = __VERIFIER_nondet_uchar() [L203] SORT_3 var_76_arg_0 = var_75; [L204] SORT_2 var_76_arg_1 = state_28; [L205] SORT_4 var_76 = ((SORT_4)var_76_arg_0 << 8) | var_76_arg_1; [L206] var_76 = var_76 & mask_SORT_4 [L207] SORT_4 var_78_arg_0 = var_76; [L208] SORT_4 var_78_arg_1 = var_77; [L209] SORT_1 var_78 = var_78_arg_0 <= var_78_arg_1; [L210] SORT_1 var_79_arg_0 = ~state_73; [L211] var_79_arg_0 = var_79_arg_0 & mask_SORT_1 [L212] SORT_1 var_79_arg_1 = ~var_78; [L213] var_79_arg_1 = var_79_arg_1 & mask_SORT_1 [L214] SORT_1 var_79 = var_79_arg_0 & var_79_arg_1; [L215] var_79 = var_79 & mask_SORT_1 [L216] SORT_1 bad_80_arg_0 = var_79; [L217] CALL __VERIFIER_assert(!(bad_80_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s 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 03:43:57,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/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_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/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_296da2a3-62b0-4eb0-9576-dd2f9693982c/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 00dd9581d22f64efd69082a191ec7029f41a290244aef7e9060b3ab5ce6080c4 --- 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 03:44:00,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:44:00,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:44:00,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:44:00,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:44:00,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:44:00,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:44:00,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:44:00,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:44:00,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:44:00,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:44:00,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:44:00,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:44:00,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:44:00,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:44:00,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:44:00,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:44:00,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:44:00,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:44:00,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:44:00,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:44:00,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:44:00,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:44:00,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:44:00,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:44:00,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:44:00,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:44:00,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:44:00,632 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:44:00,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:44:00,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:44:00,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:44:00,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:44:00,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:44:00,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:44:00,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:44:00,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:44:00,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:44:00,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:44:00,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:44:00,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:44:00,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:44:00,696 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:44:00,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:44:00,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:44:00,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:44:00,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:44:00,699 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:44:00,700 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:44:00,700 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:44:00,700 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:44:00,700 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:44:00,702 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:44:00,702 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:44:00,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:44:00,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:44:00,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:44:00,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:44:00,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:44:00,705 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:44:00,705 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:44:00,705 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:44:00,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:44:00,706 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:44:00,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:44:00,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:44:00,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:44:00,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:44:00,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:44:00,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:44:00,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:44:00,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:44:00,708 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:44:00,708 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:00,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:44:00,709 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:44:00,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:44:00,710 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_296da2a3-62b0-4eb0-9576-dd2f9693982c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00dd9581d22f64efd69082a191ec7029f41a290244aef7e9060b3ab5ce6080c4 [2022-11-03 03:44:01,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:44:01,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:44:01,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:44:01,275 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:44:01,276 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:44:01,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c [2022-11-03 03:44:01,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/data/586a9b67a/7eb74128607f4b96be104ebcb2efb731/FLAG76db8036d [2022-11-03 03:44:02,219 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:44:02,220 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c [2022-11-03 03:44:02,242 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/data/586a9b67a/7eb74128607f4b96be104ebcb2efb731/FLAG76db8036d [2022-11-03 03:44:02,258 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/data/586a9b67a/7eb74128607f4b96be104ebcb2efb731 [2022-11-03 03:44:02,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:44:02,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:44:02,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:44:02,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:44:02,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:44:02,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:44:02" (1/1) ... [2022-11-03 03:44:02,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a67e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:02, skipping insertion in model container [2022-11-03 03:44:02,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:44:02" (1/1) ... [2022-11-03 03:44:02,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:44:02,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:44:02,581 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_296da2a3-62b0-4eb0-9576-dd2f9693982c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c[1014,1027] [2022-11-03 03:44:03,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:44:03,016 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:44:03,029 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_296da2a3-62b0-4eb0-9576-dd2f9693982c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.krebs.3.prop1-func-interl.c[1014,1027] [2022-11-03 03:44:03,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:44:03,272 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:44:03,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03 WrapperNode [2022-11-03 03:44:03,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:44:03,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:44:03,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:44:03,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:44:03,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,489 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1661 [2022-11-03 03:44:03,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:44:03,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:44:03,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:44:03,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:44:03,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:44:03,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:44:03,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:44:03,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:44:03,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (1/1) ... [2022-11-03 03:44:03,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:44:03,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:03,709 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:44:03,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:44:03,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:44:03,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:44:04,275 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:44:04,277 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:44:06,515 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:44:06,525 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:44:06,525 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:44:06,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:44:06 BoogieIcfgContainer [2022-11-03 03:44:06,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:44:06,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:44:06,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:44:06,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:44:06,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:44:02" (1/3) ... [2022-11-03 03:44:06,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200a95be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:44:06, skipping insertion in model container [2022-11-03 03:44:06,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:03" (2/3) ... [2022-11-03 03:44:06,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200a95be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:44:06, skipping insertion in model container [2022-11-03 03:44:06,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:44:06" (3/3) ... [2022-11-03 03:44:06,538 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.krebs.3.prop1-func-interl.c [2022-11-03 03:44:06,562 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:44:06,562 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:44:06,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:44:06,629 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;@4d86bf31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:44:06,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:44:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 99 states have (on average 1.494949494949495) internal successors, (148), 100 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:44:06,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:06,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:44:06,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:06,650 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 03:44:06,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:06,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460050846] [2022-11-03 03:44:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:06,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:06,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:06,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:06,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:44:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:07,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:44:07,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:07,406 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 03:44:07,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:07,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:07,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460050846] [2022-11-03 03:44:07,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460050846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:07,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:07,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:07,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610877507] [2022-11-03 03:44:07,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:07,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:07,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:07,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:07,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:07,462 INFO L87 Difference]: Start difference. First operand has 101 states, 99 states have (on average 1.494949494949495) internal successors, (148), 100 states have internal predecessors, (148), 0 states have call successors, (0), 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 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:07,971 INFO L93 Difference]: Finished difference Result 290 states and 435 transitions. [2022-11-03 03:44:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:44:07,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-03 03:44:07,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:07,987 INFO L225 Difference]: With dead ends: 290 [2022-11-03 03:44:07,987 INFO L226 Difference]: Without dead ends: 191 [2022-11-03 03:44:07,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 03:44:07,995 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 273 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:07,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 394 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:44:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-03 03:44:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 99. [2022-11-03 03:44:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 144 transitions. [2022-11-03 03:44:08,048 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 144 transitions. Word has length 5 [2022-11-03 03:44:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:08,049 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 144 transitions. [2022-11-03 03:44:08,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 144 transitions. [2022-11-03 03:44:08,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:44:08,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:08,053 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:44:08,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 03:44:08,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:08,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:08,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1387976869, now seen corresponding path program 1 times [2022-11-03 03:44:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:08,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044142450] [2022-11-03 03:44:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:08,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:08,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:08,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:08,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:44:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:09,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:44:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:09,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:09,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:09,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044142450] [2022-11-03 03:44:09,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044142450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:09,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:09,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:09,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652699020] [2022-11-03 03:44:09,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:09,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:09,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:09,605 INFO L87 Difference]: Start difference. First operand 99 states and 144 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:09,759 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2022-11-03 03:44:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:44:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:44:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:09,762 INFO L225 Difference]: With dead ends: 198 [2022-11-03 03:44:09,762 INFO L226 Difference]: Without dead ends: 103 [2022-11-03 03:44:09,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 03:44:09,764 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 2 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:09,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 662 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-03 03:44:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-03 03:44:09,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-03 03:44:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.4607843137254901) internal successors, (149), 102 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 149 transitions. [2022-11-03 03:44:09,776 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 149 transitions. Word has length 98 [2022-11-03 03:44:09,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:09,777 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 149 transitions. [2022-11-03 03:44:09,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 149 transitions. [2022-11-03 03:44:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:44:09,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:09,781 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:44:09,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:09,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:09,997 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:09,999 INFO L85 PathProgramCache]: Analyzing trace with hash 552605145, now seen corresponding path program 1 times [2022-11-03 03:44:10,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:10,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869184205] [2022-11-03 03:44:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:10,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:10,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:10,007 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:10,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:44:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:10,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:44:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:11,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:11,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:11,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869184205] [2022-11-03 03:44:11,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869184205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:11,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:11,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:11,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824486291] [2022-11-03 03:44:11,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:11,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:11,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:11,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:11,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:11,280 INFO L87 Difference]: Start difference. First operand 103 states and 149 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:11,473 INFO L93 Difference]: Finished difference Result 322 states and 472 transitions. [2022-11-03 03:44:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:44:11,474 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:44:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:11,476 INFO L225 Difference]: With dead ends: 322 [2022-11-03 03:44:11,476 INFO L226 Difference]: Without dead ends: 227 [2022-11-03 03:44:11,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 03:44:11,478 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 196 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:11,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 826 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2022-11-03 03:44:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-03 03:44:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 133. [2022-11-03 03:44:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.4621212121212122) internal successors, (193), 132 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2022-11-03 03:44:11,492 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 98 [2022-11-03 03:44:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:11,493 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2022-11-03 03:44:11,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:11,493 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2022-11-03 03:44:11,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:44:11,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:11,496 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:44:11,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:11,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:11,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash 135208539, now seen corresponding path program 1 times [2022-11-03 03:44:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741805081] [2022-11-03 03:44:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:11,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:11,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:11,732 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:11,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:44:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:12,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:44:12,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:12,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:12,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:12,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741805081] [2022-11-03 03:44:12,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741805081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:12,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:12,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:12,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120241934] [2022-11-03 03:44:12,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:12,944 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:13,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:13,231 INFO L93 Difference]: Finished difference Result 382 states and 560 transitions. [2022-11-03 03:44:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:44:13,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:44:13,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:13,235 INFO L225 Difference]: With dead ends: 382 [2022-11-03 03:44:13,235 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 03:44:13,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:44:13,237 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 413 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:13,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 915 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-11-03 03:44:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 03:44:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 153. [2022-11-03 03:44:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.4605263157894737) internal successors, (222), 152 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 222 transitions. [2022-11-03 03:44:13,250 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 222 transitions. Word has length 98 [2022-11-03 03:44:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:13,250 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 222 transitions. [2022-11-03 03:44:13,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:13,251 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 222 transitions. [2022-11-03 03:44:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:44:13,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:13,253 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:44:13,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:13,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -762184739, now seen corresponding path program 1 times [2022-11-03 03:44:13,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:13,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383183932] [2022-11-03 03:44:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:13,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:13,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:13,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:13,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:44:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:14,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:44:14,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:14,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:14,764 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:14,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383183932] [2022-11-03 03:44:14,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383183932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:14,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:14,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:14,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429675008] [2022-11-03 03:44:14,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:14,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:14,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:14,768 INFO L87 Difference]: Start difference. First operand 153 states and 222 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:15,009 INFO L93 Difference]: Finished difference Result 382 states and 559 transitions. [2022-11-03 03:44:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:44:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:44:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:15,012 INFO L225 Difference]: With dead ends: 382 [2022-11-03 03:44:15,012 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 03:44:15,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:44:15,014 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 391 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:15,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1026 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-03 03:44:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 03:44:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 161. [2022-11-03 03:44:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.45625) internal successors, (233), 160 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 233 transitions. [2022-11-03 03:44:15,025 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 233 transitions. Word has length 98 [2022-11-03 03:44:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:15,026 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 233 transitions. [2022-11-03 03:44:15,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 233 transitions. [2022-11-03 03:44:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:44:15,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:15,028 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:44:15,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:15,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:15,249 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:15,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:15,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1606190241, now seen corresponding path program 1 times [2022-11-03 03:44:15,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:15,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207905963] [2022-11-03 03:44:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:15,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:15,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:15,253 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:15,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:44:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:16,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:44:16,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:16,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:16,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:16,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207905963] [2022-11-03 03:44:16,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207905963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:16,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:16,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:16,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283760199] [2022-11-03 03:44:16,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:16,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:16,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:16,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:16,537 INFO L87 Difference]: Start difference. First operand 161 states and 233 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:16,765 INFO L93 Difference]: Finished difference Result 448 states and 655 transitions. [2022-11-03 03:44:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:44:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:44:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:16,768 INFO L225 Difference]: With dead ends: 448 [2022-11-03 03:44:16,768 INFO L226 Difference]: Without dead ends: 353 [2022-11-03 03:44:16,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:44:16,770 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 385 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:16,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 942 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-11-03 03:44:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-03 03:44:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 231. [2022-11-03 03:44:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.4565217391304348) internal successors, (335), 230 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 335 transitions. [2022-11-03 03:44:16,781 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 335 transitions. Word has length 98 [2022-11-03 03:44:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:16,782 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 335 transitions. [2022-11-03 03:44:16,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 335 transitions. [2022-11-03 03:44:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:44:16,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:16,785 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:44:16,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:16,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:16,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash -904590367, now seen corresponding path program 1 times [2022-11-03 03:44:17,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:17,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708170293] [2022-11-03 03:44:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:17,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:17,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:17,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:44:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:17,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:44:17,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:18,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:18,389 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:18,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708170293] [2022-11-03 03:44:18,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708170293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:18,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:18,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:44:18,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915458713] [2022-11-03 03:44:18,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:18,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:44:18,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:18,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:44:18,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:44:18,392 INFO L87 Difference]: Start difference. First operand 231 states and 335 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:18,535 INFO L93 Difference]: Finished difference Result 416 states and 605 transitions. [2022-11-03 03:44:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:44:18,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:44:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:18,539 INFO L225 Difference]: With dead ends: 416 [2022-11-03 03:44:18,539 INFO L226 Difference]: Without dead ends: 321 [2022-11-03 03:44:18,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 03:44:18,541 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 118 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:18,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 806 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-11-03 03:44:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-03 03:44:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2022-11-03 03:44:18,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.45) internal successors, (464), 320 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 464 transitions. [2022-11-03 03:44:18,552 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 464 transitions. Word has length 98 [2022-11-03 03:44:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:18,553 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 464 transitions. [2022-11-03 03:44:18,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 464 transitions. [2022-11-03 03:44:18,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:44:18,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:18,556 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:44:18,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:18,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:18,783 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:18,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:18,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1467148895, now seen corresponding path program 1 times [2022-11-03 03:44:18,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:18,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207509079] [2022-11-03 03:44:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:18,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:18,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:18,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:18,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:44:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:19,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:44:19,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:21,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:33,333 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:33,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207509079] [2022-11-03 03:44:33,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207509079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:33,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [64003989] [2022-11-03 03:44:33,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:33,335 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:33,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:33,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:33,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 03:44:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:35,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:44:35,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:36,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:45:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:48,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [64003989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:45:48,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241106368] [2022-11-03 03:45:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:48,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:48,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:48,338 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:48,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:45:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:49,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:45:49,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:52,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:45:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:57,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241106368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:45:57,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:45:57,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 03:45:57,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173787865] [2022-11-03 03:45:57,147 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:45:57,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:45:57,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:45:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:45:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1050, Unknown=30, NotChecked=0, Total=1260 [2022-11-03 03:45:57,150 INFO L87 Difference]: Start difference. First operand 321 states and 464 transitions. Second operand has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:45:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:59,161 INFO L93 Difference]: Finished difference Result 661 states and 958 transitions. [2022-11-03 03:45:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:45:59,162 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 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 98 [2022-11-03 03:45:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:59,168 INFO L225 Difference]: With dead ends: 661 [2022-11-03 03:45:59,168 INFO L226 Difference]: Without dead ends: 659 [2022-11-03 03:45:59,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 550 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 85.1s TimeCoverageRelationStatistics Valid=346, Invalid=1694, Unknown=30, NotChecked=0, Total=2070 [2022-11-03 03:45:59,171 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 933 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 3102 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:59,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [933 Valid, 3102 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-11-03 03:45:59,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-03 03:45:59,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 608. [2022-11-03 03:45:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 1.4514003294892917) internal successors, (881), 607 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:45:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 881 transitions. [2022-11-03 03:45:59,190 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 881 transitions. Word has length 98 [2022-11-03 03:45:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:59,190 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 881 transitions. [2022-11-03 03:45:59,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:45:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 881 transitions. [2022-11-03 03:45:59,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:45:59,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:59,195 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:45:59,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:59,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-03 03:45:59,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:59,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:45:59,815 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:59,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:59,816 INFO L85 PathProgramCache]: Analyzing trace with hash -378218271, now seen corresponding path program 1 times [2022-11-03 03:45:59,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:45:59,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475216553] [2022-11-03 03:45:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:59,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:45:59,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:45:59,819 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:45:59,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:46:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:00,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:46:00,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:01,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:01,033 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:01,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475216553] [2022-11-03 03:46:01,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475216553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:01,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:01,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:01,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220110837] [2022-11-03 03:46:01,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:01,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:01,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:01,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:01,035 INFO L87 Difference]: Start difference. First operand 608 states and 881 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:46:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:01,514 INFO L93 Difference]: Finished difference Result 941 states and 1365 transitions. [2022-11-03 03:46:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:46:01,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:46:01,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:01,520 INFO L225 Difference]: With dead ends: 941 [2022-11-03 03:46:01,521 INFO L226 Difference]: Without dead ends: 846 [2022-11-03 03:46:01,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:46:01,522 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 256 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:01,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1454 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 19 Unchecked, 0.4s Time] [2022-11-03 03:46:01,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-03 03:46:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 708. [2022-11-03 03:46:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 1.4469589816124468) internal successors, (1023), 707 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:46:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1023 transitions. [2022-11-03 03:46:01,543 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1023 transitions. Word has length 98 [2022-11-03 03:46:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:01,544 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 1023 transitions. [2022-11-03 03:46:01,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:46:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1023 transitions. [2022-11-03 03:46:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:46:01,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:01,547 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:46:01,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:01,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:01,767 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash 322846307, now seen corresponding path program 1 times [2022-11-03 03:46:01,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:01,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65534182] [2022-11-03 03:46:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:01,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:01,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:01,771 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:01,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:46:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:02,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:46:02,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:04,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:12,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65534182] [2022-11-03 03:46:12,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65534182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [34227869] [2022-11-03 03:46:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:12,344 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:46:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:46:12,346 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:46:12,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 03:46:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:13,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:46:13,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:15,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:11,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [34227869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:11,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782128192] [2022-11-03 03:47:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:11,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:11,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:11,358 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:11,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:47:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:12,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:47:12,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:15,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:19,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782128192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:19,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:47:19,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 03:47:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404255430] [2022-11-03 03:47:19,402 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:47:19,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:47:19,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:19,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:47:19,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1055, Unknown=25, NotChecked=0, Total=1260 [2022-11-03 03:47:19,404 INFO L87 Difference]: Start difference. First operand 708 states and 1023 transitions. Second operand has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:21,068 INFO L93 Difference]: Finished difference Result 1254 states and 1816 transitions. [2022-11-03 03:47:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:47:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 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 98 [2022-11-03 03:47:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:21,074 INFO L225 Difference]: With dead ends: 1254 [2022-11-03 03:47:21,074 INFO L226 Difference]: Without dead ends: 1252 [2022-11-03 03:47:21,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 550 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 65.8s TimeCoverageRelationStatistics Valid=346, Invalid=1699, Unknown=25, NotChecked=0, Total=2070 [2022-11-03 03:47:21,076 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1425 mSDsluCounter, 2677 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 2794 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:21,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1425 Valid, 2794 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 57 Unchecked, 0.0s Time] [2022-11-03 03:47:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-11-03 03:47:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1202. [2022-11-03 03:47:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1201 states have (on average 1.450457951706911) internal successors, (1742), 1201 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1742 transitions. [2022-11-03 03:47:21,118 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1742 transitions. Word has length 98 [2022-11-03 03:47:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:21,119 INFO L495 AbstractCegarLoop]: Abstraction has 1202 states and 1742 transitions. [2022-11-03 03:47:21,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1742 transitions. [2022-11-03 03:47:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:47:21,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:21,123 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:47:21,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:21,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:21,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:21,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:21,739 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:21,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1604992281, now seen corresponding path program 1 times [2022-11-03 03:47:21,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:21,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614434291] [2022-11-03 03:47:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:21,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:21,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:21,743 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:21,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:47:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:22,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:47:22,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:24,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:32,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614434291] [2022-11-03 03:47:32,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614434291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1613499367] [2022-11-03 03:47:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:32,084 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:32,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:47:32,087 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:47:32,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 03:47:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:33,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:47:33,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:34,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:36,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1613499367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983756026] [2022-11-03 03:47:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:36,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:36,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:36,498 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:36,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 03:47:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:37,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:47:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:39,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:43,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983756026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:43,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:47:43,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 26 [2022-11-03 03:47:43,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282566985] [2022-11-03 03:47:43,203 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:47:43,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 03:47:43,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:43,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 03:47:43,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=568, Unknown=2, NotChecked=0, Total=650 [2022-11-03 03:47:43,207 INFO L87 Difference]: Start difference. First operand 1202 states and 1742 transitions. Second operand has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:44,206 INFO L93 Difference]: Finished difference Result 2108 states and 3039 transitions. [2022-11-03 03:47:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:47:44,207 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 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 98 [2022-11-03 03:47:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:44,215 INFO L225 Difference]: With dead ends: 2108 [2022-11-03 03:47:44,216 INFO L226 Difference]: Without dead ends: 2106 [2022-11-03 03:47:44,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 558 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=168, Invalid=952, Unknown=2, NotChecked=0, Total=1122 [2022-11-03 03:47:44,218 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 585 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:44,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 2081 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2022-11-03 03:47:44,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2022-11-03 03:47:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1755. [2022-11-03 03:47:44,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 1.4498289623717218) internal successors, (2543), 1754 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2543 transitions. [2022-11-03 03:47:44,287 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2543 transitions. Word has length 98 [2022-11-03 03:47:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:44,288 INFO L495 AbstractCegarLoop]: Abstraction has 1755 states and 2543 transitions. [2022-11-03 03:47:44,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2543 transitions. [2022-11-03 03:47:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:47:44,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:44,294 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:47:44,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:44,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:44,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:44,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:44,903 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2097618455, now seen corresponding path program 1 times [2022-11-03 03:47:44,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:44,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7767888] [2022-11-03 03:47:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:44,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:44,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:44,907 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:44,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:47:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:45,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:47:45,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:45,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:45,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:45,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7767888] [2022-11-03 03:47:45,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7767888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:45,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:45,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:47:45,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130823406] [2022-11-03 03:47:45,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:45,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:47:45,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:45,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:47:45,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:45,837 INFO L87 Difference]: Start difference. First operand 1755 states and 2543 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:46,151 INFO L93 Difference]: Finished difference Result 3936 states and 5675 transitions. [2022-11-03 03:47:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:47:46,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:47:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:46,170 INFO L225 Difference]: With dead ends: 3936 [2022-11-03 03:47:46,170 INFO L226 Difference]: Without dead ends: 3014 [2022-11-03 03:47:46,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:47:46,173 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 256 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:46,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1445 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-11-03 03:47:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2022-11-03 03:47:46,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 1771. [2022-11-03 03:47:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1770 states have (on average 1.4367231638418079) internal successors, (2543), 1770 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 2543 transitions. [2022-11-03 03:47:46,236 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 2543 transitions. Word has length 98 [2022-11-03 03:47:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:46,237 INFO L495 AbstractCegarLoop]: Abstraction has 1771 states and 2543 transitions. [2022-11-03 03:47:46,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:47:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 2543 transitions. [2022-11-03 03:47:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:47:46,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:46,243 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:47:46,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:46,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:46,463 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:46,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:46,463 INFO L85 PathProgramCache]: Analyzing trace with hash 168762731, now seen corresponding path program 1 times [2022-11-03 03:47:46,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:46,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895614303] [2022-11-03 03:47:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:46,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:46,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:46,467 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:46,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:47:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:47,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 03:47:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:49,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:01,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:01,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895614303] [2022-11-03 03:48:01,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895614303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:01,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1220196954] [2022-11-03 03:48:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:01,010 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:48:01,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:48:01,012 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:48:01,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 03:48:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:02,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 03:48:02,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:04,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:11,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1220196954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:11,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895033489] [2022-11-03 03:49:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:11,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:11,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:11,756 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:11,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 03:49:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:12,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:49:12,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:15,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:20,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895033489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:20,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:49:20,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 03:49:20,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164387706] [2022-11-03 03:49:20,511 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:20,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:49:20,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:20,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:49:20,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1051, Unknown=30, NotChecked=0, Total=1260 [2022-11-03 03:49:20,513 INFO L87 Difference]: Start difference. First operand 1771 states and 2543 transitions. Second operand has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:22,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:22,474 INFO L93 Difference]: Finished difference Result 3658 states and 5256 transitions. [2022-11-03 03:49:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:49:22,475 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 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 98 [2022-11-03 03:49:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:22,485 INFO L225 Difference]: With dead ends: 3658 [2022-11-03 03:49:22,486 INFO L226 Difference]: Without dead ends: 3656 [2022-11-03 03:49:22,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 549 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 81.0s TimeCoverageRelationStatistics Valid=345, Invalid=1695, Unknown=30, NotChecked=0, Total=2070 [2022-11-03 03:49:22,488 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 892 mSDsluCounter, 3379 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 3500 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:22,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 3500 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 77 Unchecked, 0.0s Time] [2022-11-03 03:49:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2022-11-03 03:49:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3345. [2022-11-03 03:49:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3345 states, 3344 states have (on average 1.4386961722488039) internal successors, (4811), 3344 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3345 states to 3345 states and 4811 transitions. [2022-11-03 03:49:22,561 INFO L78 Accepts]: Start accepts. Automaton has 3345 states and 4811 transitions. Word has length 98 [2022-11-03 03:49:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:22,562 INFO L495 AbstractCegarLoop]: Abstraction has 3345 states and 4811 transitions. [2022-11-03 03:49:22,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3345 states and 4811 transitions. [2022-11-03 03:49:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:49:22,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:22,568 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:49:22,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-11-03 03:49:22,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:22,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:23,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:23,178 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:23,178 INFO L85 PathProgramCache]: Analyzing trace with hash 592409453, now seen corresponding path program 1 times [2022-11-03 03:49:23,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:23,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921584768] [2022-11-03 03:49:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:23,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:23,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:23,180 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:23,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:49:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:23,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:49:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:24,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:24,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:24,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921584768] [2022-11-03 03:49:24,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921584768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:24,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:24,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:49:24,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344059182] [2022-11-03 03:49:24,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:24,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:49:24,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:49:24,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:49:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:49:24,242 INFO L87 Difference]: Start difference. First operand 3345 states and 4811 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:24,558 INFO L93 Difference]: Finished difference Result 4919 states and 7082 transitions. [2022-11-03 03:49:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:49:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:49:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:24,568 INFO L225 Difference]: With dead ends: 4919 [2022-11-03 03:49:24,568 INFO L226 Difference]: Without dead ends: 4520 [2022-11-03 03:49:24,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:49:24,571 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 258 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:24,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1325 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-11-03 03:49:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2022-11-03 03:49:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3885. [2022-11-03 03:49:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 1.433058702368692) internal successors, (5566), 3884 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 5566 transitions. [2022-11-03 03:49:24,669 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 5566 transitions. Word has length 98 [2022-11-03 03:49:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:24,669 INFO L495 AbstractCegarLoop]: Abstraction has 3885 states and 5566 transitions. [2022-11-03 03:49:24,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 5566 transitions. [2022-11-03 03:49:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:49:24,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:24,677 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:49:24,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:24,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:49:24,893 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash -687454225, now seen corresponding path program 1 times [2022-11-03 03:49:24,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:49:24,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118979031] [2022-11-03 03:49:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:24,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:49:24,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:49:24,897 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:49:24,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:49:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:25,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 03:49:25,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:28,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:41,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:49:41,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118979031] [2022-11-03 03:49:41,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118979031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:41,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [953875707] [2022-11-03 03:49:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:41,793 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:49:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:49:41,795 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:49:41,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 03:49:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 03:49:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:49:45,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:52,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [953875707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:52,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165671853] [2022-11-03 03:50:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:52,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:52,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:52,689 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:52,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 03:50:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:53,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:50:53,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:57,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:02,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165671853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:02,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:02,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 03:51:02,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89406722] [2022-11-03 03:51:02,191 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:02,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:51:02,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:51:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1047, Unknown=34, NotChecked=0, Total=1260 [2022-11-03 03:51:02,196 INFO L87 Difference]: Start difference. First operand 3885 states and 5566 transitions. Second operand has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:04,287 INFO L93 Difference]: Finished difference Result 6558 states and 9403 transitions. [2022-11-03 03:51:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:51:04,288 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 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 98 [2022-11-03 03:51:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:04,308 INFO L225 Difference]: With dead ends: 6558 [2022-11-03 03:51:04,308 INFO L226 Difference]: Without dead ends: 6556 [2022-11-03 03:51:04,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 549 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 84.2s TimeCoverageRelationStatistics Valid=345, Invalid=1691, Unknown=34, NotChecked=0, Total=2070 [2022-11-03 03:51:04,311 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1017 mSDsluCounter, 3163 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 3282 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:04,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 3282 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 56 Unchecked, 0.0s Time] [2022-11-03 03:51:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-11-03 03:51:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6033. [2022-11-03 03:51:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6033 states, 6032 states have (on average 1.4350132625994696) internal successors, (8656), 6032 states have internal predecessors, (8656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6033 states to 6033 states and 8656 transitions. [2022-11-03 03:51:04,481 INFO L78 Accepts]: Start accepts. Automaton has 6033 states and 8656 transitions. Word has length 98 [2022-11-03 03:51:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:04,482 INFO L495 AbstractCegarLoop]: Abstraction has 6033 states and 8656 transitions. [2022-11-03 03:51:04,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6033 states and 8656 transitions. [2022-11-03 03:51:04,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:51:04,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:04,494 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:51:04,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:04,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:04,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:05,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:05,123 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:05,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:05,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1046650225, now seen corresponding path program 1 times [2022-11-03 03:51:05,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:05,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572671371] [2022-11-03 03:51:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:05,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:05,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:05,126 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:05,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:51:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:51:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:05,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:05,986 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:05,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572671371] [2022-11-03 03:51:05,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572671371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:05,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:05,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:51:05,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118047453] [2022-11-03 03:51:05,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:05,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:51:05,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:51:05,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:51:05,989 INFO L87 Difference]: Start difference. First operand 6033 states and 8656 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:06,479 INFO L93 Difference]: Finished difference Result 15959 states and 22841 transitions. [2022-11-03 03:51:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:51:06,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:51:06,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:06,508 INFO L225 Difference]: With dead ends: 15959 [2022-11-03 03:51:06,508 INFO L226 Difference]: Without dead ends: 12432 [2022-11-03 03:51:06,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:51:06,515 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 259 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:06,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1682 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-11-03 03:51:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12432 states. [2022-11-03 03:51:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12432 to 6189. [2022-11-03 03:51:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6189 states, 6188 states have (on average 1.4301874595992243) internal successors, (8850), 6188 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6189 states to 6189 states and 8850 transitions. [2022-11-03 03:51:06,750 INFO L78 Accepts]: Start accepts. Automaton has 6189 states and 8850 transitions. Word has length 98 [2022-11-03 03:51:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:06,750 INFO L495 AbstractCegarLoop]: Abstraction has 6189 states and 8850 transitions. [2022-11-03 03:51:06,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6189 states and 8850 transitions. [2022-11-03 03:51:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:51:06,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:06,762 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:51:06,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:06,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:06,979 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1286742413, now seen corresponding path program 1 times [2022-11-03 03:51:06,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:06,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598829965] [2022-11-03 03:51:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:06,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:06,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:06,982 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:06,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:51:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:07,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:51:07,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:07,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:07,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:07,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598829965] [2022-11-03 03:51:07,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598829965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:07,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:07,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:51:07,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898250539] [2022-11-03 03:51:07,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:07,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:51:07,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:07,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:51:07,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:51:07,982 INFO L87 Difference]: Start difference. First operand 6189 states and 8850 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:08,371 INFO L93 Difference]: Finished difference Result 10795 states and 15389 transitions. [2022-11-03 03:51:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:51:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:51:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:08,390 INFO L225 Difference]: With dead ends: 10795 [2022-11-03 03:51:08,390 INFO L226 Difference]: Without dead ends: 9592 [2022-11-03 03:51:08,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:51:08,395 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 216 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:08,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1512 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 29 Unchecked, 0.3s Time] [2022-11-03 03:51:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9592 states. [2022-11-03 03:51:08,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9592 to 7601. [2022-11-03 03:51:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7601 states, 7600 states have (on average 1.4213157894736843) internal successors, (10802), 7600 states have internal predecessors, (10802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7601 states to 7601 states and 10802 transitions. [2022-11-03 03:51:08,582 INFO L78 Accepts]: Start accepts. Automaton has 7601 states and 10802 transitions. Word has length 98 [2022-11-03 03:51:08,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:08,583 INFO L495 AbstractCegarLoop]: Abstraction has 7601 states and 10802 transitions. [2022-11-03 03:51:08,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7601 states and 10802 transitions. [2022-11-03 03:51:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:51:08,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:08,598 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:51:08,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:08,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:08,822 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1359128971, now seen corresponding path program 1 times [2022-11-03 03:51:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:08,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533560213] [2022-11-03 03:51:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:08,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:08,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:08,825 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:08,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:51:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:09,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:51:09,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:09,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:51:09,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533560213] [2022-11-03 03:51:09,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533560213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:51:09,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:51:09,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:51:09,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481694751] [2022-11-03 03:51:09,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:51:09,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:51:09,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:09,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:51:09,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:51:09,899 INFO L87 Difference]: Start difference. First operand 7601 states and 10802 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:10,180 INFO L93 Difference]: Finished difference Result 9635 states and 13728 transitions. [2022-11-03 03:51:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:51:10,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:51:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:10,196 INFO L225 Difference]: With dead ends: 9635 [2022-11-03 03:51:10,197 INFO L226 Difference]: Without dead ends: 8744 [2022-11-03 03:51:10,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 03:51:10,201 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 191 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:10,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1208 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-11-03 03:51:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2022-11-03 03:51:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7901. [2022-11-03 03:51:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7901 states, 7900 states have (on average 1.4162025316455695) internal successors, (11188), 7900 states have internal predecessors, (11188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7901 states to 7901 states and 11188 transitions. [2022-11-03 03:51:10,436 INFO L78 Accepts]: Start accepts. Automaton has 7901 states and 11188 transitions. Word has length 98 [2022-11-03 03:51:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:10,437 INFO L495 AbstractCegarLoop]: Abstraction has 7901 states and 11188 transitions. [2022-11-03 03:51:10,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 7901 states and 11188 transitions. [2022-11-03 03:51:10,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:51:10,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:10,452 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:51:10,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:10,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:10,673 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1130399991, now seen corresponding path program 1 times [2022-11-03 03:51:10,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:10,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405268913] [2022-11-03 03:51:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:10,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:10,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:10,677 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:10,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:51:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:11,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:51:11,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:12,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:23,235 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:23,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405268913] [2022-11-03 03:51:23,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405268913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:23,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [311839291] [2022-11-03 03:51:23,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:23,236 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:23,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:23,237 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:23,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 03:51:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:51:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:25,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:27,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [311839291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:27,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36175441] [2022-11-03 03:51:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:27,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:27,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:27,623 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:27,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 03:51:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:28,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:51:28,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:31,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:35,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36175441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:35,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:51:35,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 26 [2022-11-03 03:51:35,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382491727] [2022-11-03 03:51:35,698 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:35,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 03:51:35,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:51:35,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 03:51:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=566, Unknown=4, NotChecked=0, Total=650 [2022-11-03 03:51:35,700 INFO L87 Difference]: Start difference. First operand 7901 states and 11188 transitions. Second operand has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:36,731 INFO L93 Difference]: Finished difference Result 8328 states and 11785 transitions. [2022-11-03 03:51:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:51:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 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 98 [2022-11-03 03:51:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:36,746 INFO L225 Difference]: With dead ends: 8328 [2022-11-03 03:51:36,746 INFO L226 Difference]: Without dead ends: 8326 [2022-11-03 03:51:36,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 558 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=168, Invalid=950, Unknown=4, NotChecked=0, Total=1122 [2022-11-03 03:51:36,750 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 410 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:36,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 1829 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 46 Unchecked, 0.0s Time] [2022-11-03 03:51:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8326 states. [2022-11-03 03:51:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 7931. [2022-11-03 03:51:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 1.4165195460277427) internal successors, (11233), 7930 states have internal predecessors, (11233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 11233 transitions. [2022-11-03 03:51:36,911 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 11233 transitions. Word has length 98 [2022-11-03 03:51:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:36,912 INFO L495 AbstractCegarLoop]: Abstraction has 7931 states and 11233 transitions. [2022-11-03 03:51:36,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 11233 transitions. [2022-11-03 03:51:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:51:36,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:36,928 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:51:36,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:37,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:37,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:37,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:51:37,540 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:37,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1810458361, now seen corresponding path program 1 times [2022-11-03 03:51:37,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:51:37,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130131545] [2022-11-03 03:51:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:37,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:51:37,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:51:37,543 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:51:37,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 03:51:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:38,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:51:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:40,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:51,473 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:51:51,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130131545] [2022-11-03 03:51:51,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130131545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:51,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [173121305] [2022-11-03 03:51:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:51,474 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:51:51,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:51:51,475 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:51:51,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 03:51:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:51:52,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:51:52,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:51:54,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:52:58,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [173121305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:58,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410972409] [2022-11-03 03:52:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:58,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:58,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:58,976 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:58,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 03:52:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:59,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:52:59,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:02,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:08,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410972409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:08,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:53:08,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 03:53:08,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258575396] [2022-11-03 03:53:08,081 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:53:08,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:53:08,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:53:08,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1050, Unknown=30, NotChecked=0, Total=1260 [2022-11-03 03:53:08,083 INFO L87 Difference]: Start difference. First operand 7931 states and 11233 transitions. Second operand has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:09,755 INFO L93 Difference]: Finished difference Result 10672 states and 15138 transitions. [2022-11-03 03:53:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:53:09,764 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 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 98 [2022-11-03 03:53:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:09,778 INFO L225 Difference]: With dead ends: 10672 [2022-11-03 03:53:09,778 INFO L226 Difference]: Without dead ends: 10670 [2022-11-03 03:53:09,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 549 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 77.9s TimeCoverageRelationStatistics Valid=346, Invalid=1694, Unknown=30, NotChecked=0, Total=2070 [2022-11-03 03:53:09,785 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1242 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:09,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 2550 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-11-03 03:53:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10670 states. [2022-11-03 03:53:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10670 to 10095. [2022-11-03 03:53:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10095 states, 10094 states have (on average 1.4192589657222112) internal successors, (14326), 10094 states have internal predecessors, (14326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10095 states to 10095 states and 14326 transitions. [2022-11-03 03:53:10,001 INFO L78 Accepts]: Start accepts. Automaton has 10095 states and 14326 transitions. Word has length 98 [2022-11-03 03:53:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:10,002 INFO L495 AbstractCegarLoop]: Abstraction has 10095 states and 14326 transitions. [2022-11-03 03:53:10,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:10,003 INFO L276 IsEmpty]: Start isEmpty. Operand 10095 states and 14326 transitions. [2022-11-03 03:53:10,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:53:10,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:10,019 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:53:10,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:10,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:10,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:10,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:10,654 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1524021001, now seen corresponding path program 1 times [2022-11-03 03:53:10,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:10,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375388388] [2022-11-03 03:53:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:10,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:10,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:10,657 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:10,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 03:53:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:11,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:53:11,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:11,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:11,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:11,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375388388] [2022-11-03 03:53:11,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375388388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:11,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:11,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:53:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364558441] [2022-11-03 03:53:11,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:11,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:53:11,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:11,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:53:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:53:11,623 INFO L87 Difference]: Start difference. First operand 10095 states and 14326 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:12,065 INFO L93 Difference]: Finished difference Result 21837 states and 30878 transitions. [2022-11-03 03:53:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:53:12,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:53:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:12,089 INFO L225 Difference]: With dead ends: 21837 [2022-11-03 03:53:12,090 INFO L226 Difference]: Without dead ends: 17392 [2022-11-03 03:53:12,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:53:12,098 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 258 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:12,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1652 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 11 Unchecked, 0.3s Time] [2022-11-03 03:53:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17392 states. [2022-11-03 03:53:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17392 to 10095. [2022-11-03 03:53:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10095 states, 10094 states have (on average 1.4129185654844463) internal successors, (14262), 10094 states have internal predecessors, (14262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10095 states to 10095 states and 14262 transitions. [2022-11-03 03:53:12,339 INFO L78 Accepts]: Start accepts. Automaton has 10095 states and 14262 transitions. Word has length 98 [2022-11-03 03:53:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:12,339 INFO L495 AbstractCegarLoop]: Abstraction has 10095 states and 14262 transitions. [2022-11-03 03:53:12,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 10095 states and 14262 transitions. [2022-11-03 03:53:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:53:12,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:12,355 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:53:12,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:12,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:12,571 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:12,572 INFO L85 PathProgramCache]: Analyzing trace with hash -137235591, now seen corresponding path program 1 times [2022-11-03 03:53:12,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:12,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613654406] [2022-11-03 03:53:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:12,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:12,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:12,575 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:12,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:53:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:13,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:53:13,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:13,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:13,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:13,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613654406] [2022-11-03 03:53:13,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613654406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:13,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:13,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:53:13,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517162636] [2022-11-03 03:53:13,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:13,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:53:13,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:13,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:53:13,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:53:13,706 INFO L87 Difference]: Start difference. First operand 10095 states and 14262 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:14,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:14,079 INFO L93 Difference]: Finished difference Result 14741 states and 20866 transitions. [2022-11-03 03:53:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:53:14,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:53:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:14,103 INFO L225 Difference]: With dead ends: 14741 [2022-11-03 03:53:14,103 INFO L226 Difference]: Without dead ends: 13630 [2022-11-03 03:53:14,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:53:14,110 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 276 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:14,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1158 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-11-03 03:53:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13630 states. [2022-11-03 03:53:14,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13630 to 11119. [2022-11-03 03:53:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11119 states, 11118 states have (on average 1.4052887209929843) internal successors, (15624), 11118 states have internal predecessors, (15624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11119 states to 11119 states and 15624 transitions. [2022-11-03 03:53:14,390 INFO L78 Accepts]: Start accepts. Automaton has 11119 states and 15624 transitions. Word has length 98 [2022-11-03 03:53:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:14,390 INFO L495 AbstractCegarLoop]: Abstraction has 11119 states and 15624 transitions. [2022-11-03 03:53:14,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 11119 states and 15624 transitions. [2022-11-03 03:53:14,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:53:14,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:14,408 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:53:14,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:14,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:14,634 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:14,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1248967803, now seen corresponding path program 1 times [2022-11-03 03:53:14,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:14,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586774303] [2022-11-03 03:53:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:14,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:14,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:14,640 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:14,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:53:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:15,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:53:15,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:15,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:53:15,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:15,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586774303] [2022-11-03 03:53:15,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586774303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:53:15,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:53:15,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:53:15,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492953672] [2022-11-03 03:53:15,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:53:15,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:53:15,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:53:15,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:53:15,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:53:15,812 INFO L87 Difference]: Start difference. First operand 11119 states and 15624 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:53:16,260 INFO L93 Difference]: Finished difference Result 13859 states and 19583 transitions. [2022-11-03 03:53:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:53:16,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:53:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:53:16,275 INFO L225 Difference]: With dead ends: 13859 [2022-11-03 03:53:16,275 INFO L226 Difference]: Without dead ends: 12990 [2022-11-03 03:53:16,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:53:16,281 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 203 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:53:16,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1287 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-11-03 03:53:16,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12990 states. [2022-11-03 03:53:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12990 to 11297. [2022-11-03 03:53:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11297 states, 11296 states have (on average 1.4042138810198301) internal successors, (15862), 11296 states have internal predecessors, (15862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11297 states to 11297 states and 15862 transitions. [2022-11-03 03:53:16,515 INFO L78 Accepts]: Start accepts. Automaton has 11297 states and 15862 transitions. Word has length 98 [2022-11-03 03:53:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:53:16,516 INFO L495 AbstractCegarLoop]: Abstraction has 11297 states and 15862 transitions. [2022-11-03 03:53:16,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:53:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 11297 states and 15862 transitions. [2022-11-03 03:53:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:53:16,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:53:16,528 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:53:16,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 03:53:16,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:53:16,751 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:53:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:53:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1671669629, now seen corresponding path program 1 times [2022-11-03 03:53:16,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:53:16,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158642718] [2022-11-03 03:53:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:16,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:53:16,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:53:16,756 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:53:16,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 03:53:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:17,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:53:17,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:19,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:53:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:26,985 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:53:26,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158642718] [2022-11-03 03:53:26,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158642718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:53:26,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [288265339] [2022-11-03 03:53:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:53:26,986 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:53:26,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:53:26,987 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:53:27,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 03:53:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:53:28,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:53:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:53:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:53:30,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:32,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [288265339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:32,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814753630] [2022-11-03 03:54:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:32,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:32,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:32,651 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:32,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 03:54:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:33,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:54:33,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:37,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:42,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814753630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:42,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:54:42,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 03:54:42,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306070931] [2022-11-03 03:54:42,380 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:54:42,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:54:42,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:54:42,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:54:42,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1055, Unknown=26, NotChecked=0, Total=1260 [2022-11-03 03:54:42,382 INFO L87 Difference]: Start difference. First operand 11297 states and 15862 transitions. Second operand has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:54:44,428 INFO L93 Difference]: Finished difference Result 12758 states and 17919 transitions. [2022-11-03 03:54:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:54:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 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 98 [2022-11-03 03:54:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:54:44,437 INFO L225 Difference]: With dead ends: 12758 [2022-11-03 03:54:44,437 INFO L226 Difference]: Without dead ends: 12756 [2022-11-03 03:54:44,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 550 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 72.3s TimeCoverageRelationStatistics Valid=341, Invalid=1703, Unknown=26, NotChecked=0, Total=2070 [2022-11-03 03:54:44,439 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1169 mSDsluCounter, 2749 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:54:44,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 2868 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 45 Unchecked, 0.0s Time] [2022-11-03 03:54:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2022-11-03 03:54:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 12219. [2022-11-03 03:54:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12219 states, 12218 states have (on average 1.4056310361761335) internal successors, (17174), 12218 states have internal predecessors, (17174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12219 states to 12219 states and 17174 transitions. [2022-11-03 03:54:44,663 INFO L78 Accepts]: Start accepts. Automaton has 12219 states and 17174 transitions. Word has length 98 [2022-11-03 03:54:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:54:44,664 INFO L495 AbstractCegarLoop]: Abstraction has 12219 states and 17174 transitions. [2022-11-03 03:54:44,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:54:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 12219 states and 17174 transitions. [2022-11-03 03:54:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:54:44,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:54:44,676 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:54:44,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:44,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 03:54:45,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 03:54:45,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:45,298 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:54:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:54:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash -256168959, now seen corresponding path program 1 times [2022-11-03 03:54:45,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:54:45,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285818083] [2022-11-03 03:54:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:45,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:54:45,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:54:45,301 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:54:45,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 03:54:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:46,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:54:46,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:48,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:54,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:54:54,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285818083] [2022-11-03 03:54:54,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285818083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:54,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [364685114] [2022-11-03 03:54:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:54,898 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:54:54,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:54:54,902 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:54:54,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 03:54:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:56,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:54:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:58,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:02,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [364685114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:02,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121670113] [2022-11-03 03:56:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:02,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:02,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:02,010 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:02,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 03:56:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:02,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:56:02,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:06,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:11,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121670113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:11,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:11,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 36 [2022-11-03 03:56:11,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154913787] [2022-11-03 03:56:11,335 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:11,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:56:11,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:11,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:56:11,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1053, Unknown=28, NotChecked=0, Total=1260 [2022-11-03 03:56:11,336 INFO L87 Difference]: Start difference. First operand 12219 states and 17174 transitions. Second operand has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:13,385 INFO L93 Difference]: Finished difference Result 25028 states and 35181 transitions. [2022-11-03 03:56:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:56:13,386 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 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 98 [2022-11-03 03:56:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:13,401 INFO L225 Difference]: With dead ends: 25028 [2022-11-03 03:56:13,402 INFO L226 Difference]: Without dead ends: 25026 [2022-11-03 03:56:13,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 549 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 73.1s TimeCoverageRelationStatistics Valid=345, Invalid=1697, Unknown=28, NotChecked=0, Total=2070 [2022-11-03 03:56:13,406 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 2036 mSDsluCounter, 2554 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2036 SdHoareTripleChecker+Valid, 2668 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:13,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2036 Valid, 2668 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 81 Unchecked, 0.0s Time] [2022-11-03 03:56:13,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25026 states. [2022-11-03 03:56:13,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25026 to 22991. [2022-11-03 03:56:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22991 states, 22990 states have (on average 1.406785558938669) internal successors, (32342), 22990 states have internal predecessors, (32342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22991 states to 22991 states and 32342 transitions. [2022-11-03 03:56:13,810 INFO L78 Accepts]: Start accepts. Automaton has 22991 states and 32342 transitions. Word has length 98 [2022-11-03 03:56:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:13,811 INFO L495 AbstractCegarLoop]: Abstraction has 22991 states and 32342 transitions. [2022-11-03 03:56:13,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 13.277777777777779) internal successors, (478), 36 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22991 states and 32342 transitions. [2022-11-03 03:56:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:56:13,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:13,830 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:13,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:14,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:14,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:14,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:14,456 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:14,457 INFO L85 PathProgramCache]: Analyzing trace with hash -842445181, now seen corresponding path program 1 times [2022-11-03 03:56:14,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:14,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720635441] [2022-11-03 03:56:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:14,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:14,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:14,460 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:14,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 03:56:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:15,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:15,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:15,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:15,352 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:15,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720635441] [2022-11-03 03:56:15,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720635441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:15,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:15,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:15,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640229897] [2022-11-03 03:56:15,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:15,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:15,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:15,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:15,354 INFO L87 Difference]: Start difference. First operand 22991 states and 32342 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:16,034 INFO L93 Difference]: Finished difference Result 57825 states and 81232 transitions. [2022-11-03 03:56:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:16,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:56:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:16,067 INFO L225 Difference]: With dead ends: 57825 [2022-11-03 03:56:16,068 INFO L226 Difference]: Without dead ends: 45636 [2022-11-03 03:56:16,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:56:16,083 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 190 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:16,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1244 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-03 03:56:16,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45636 states. [2022-11-03 03:56:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45636 to 23003. [2022-11-03 03:56:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23003 states, 23002 states have (on average 1.4067472393704896) internal successors, (32358), 23002 states have internal predecessors, (32358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23003 states to 23003 states and 32358 transitions. [2022-11-03 03:56:16,646 INFO L78 Accepts]: Start accepts. Automaton has 23003 states and 32358 transitions. Word has length 98 [2022-11-03 03:56:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:16,646 INFO L495 AbstractCegarLoop]: Abstraction has 23003 states and 32358 transitions. [2022-11-03 03:56:16,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 23003 states and 32358 transitions. [2022-11-03 03:56:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:56:16,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:16,668 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:16,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:16,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:16,883 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1900283259, now seen corresponding path program 1 times [2022-11-03 03:56:16,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:16,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604327135] [2022-11-03 03:56:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:16,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:16,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:16,886 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:16,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 03:56:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:17,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:17,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:17,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:17,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:17,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604327135] [2022-11-03 03:56:17,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604327135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:17,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:17,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:17,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233716242] [2022-11-03 03:56:17,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:17,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:17,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:17,816 INFO L87 Difference]: Start difference. First operand 23003 states and 32358 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:18,710 INFO L93 Difference]: Finished difference Result 65261 states and 91284 transitions. [2022-11-03 03:56:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:18,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:56:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:18,748 INFO L225 Difference]: With dead ends: 65261 [2022-11-03 03:56:18,748 INFO L226 Difference]: Without dead ends: 53328 [2022-11-03 03:56:18,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:56:18,760 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 243 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:18,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1452 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2022-11-03 03:56:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53328 states. [2022-11-03 03:56:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53328 to 23259. [2022-11-03 03:56:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23259 states, 23258 states have (on average 1.4050219279387737) internal successors, (32678), 23258 states have internal predecessors, (32678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23259 states to 23259 states and 32678 transitions. [2022-11-03 03:56:19,262 INFO L78 Accepts]: Start accepts. Automaton has 23259 states and 32678 transitions. Word has length 98 [2022-11-03 03:56:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:19,262 INFO L495 AbstractCegarLoop]: Abstraction has 23259 states and 32678 transitions. [2022-11-03 03:56:19,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 23259 states and 32678 transitions. [2022-11-03 03:56:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:56:19,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:19,277 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:19,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:19,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:19,478 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:19,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1178530311, now seen corresponding path program 1 times [2022-11-03 03:56:19,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:19,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729732097] [2022-11-03 03:56:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:19,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:19,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:19,480 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:19,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 03:56:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:20,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:20,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:20,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:20,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:20,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729732097] [2022-11-03 03:56:20,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729732097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:20,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:20,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:20,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036848034] [2022-11-03 03:56:20,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:20,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:20,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:20,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:20,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:20,421 INFO L87 Difference]: Start difference. First operand 23259 states and 32678 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:21,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:21,125 INFO L93 Difference]: Finished difference Result 53125 states and 74314 transitions. [2022-11-03 03:56:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:21,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:56:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:21,155 INFO L225 Difference]: With dead ends: 53125 [2022-11-03 03:56:21,155 INFO L226 Difference]: Without dead ends: 43336 [2022-11-03 03:56:21,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:56:21,165 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 196 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:21,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1030 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-03 03:56:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43336 states. [2022-11-03 03:56:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43336 to 25403. [2022-11-03 03:56:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25403 states, 25402 states have (on average 1.3960318085190142) internal successors, (35462), 25402 states have internal predecessors, (35462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25403 states to 25403 states and 35462 transitions. [2022-11-03 03:56:21,763 INFO L78 Accepts]: Start accepts. Automaton has 25403 states and 35462 transitions. Word has length 98 [2022-11-03 03:56:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:21,763 INFO L495 AbstractCegarLoop]: Abstraction has 25403 states and 35462 transitions. [2022-11-03 03:56:21,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 25403 states and 35462 transitions. [2022-11-03 03:56:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:56:21,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:21,787 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:21,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 03:56:22,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:22,012 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:22,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:22,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1163011593, now seen corresponding path program 1 times [2022-11-03 03:56:22,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:22,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106195284] [2022-11-03 03:56:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:22,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:22,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:22,015 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:22,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 03:56:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:22,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:23,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:23,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:23,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106195284] [2022-11-03 03:56:23,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106195284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:23,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:23,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:23,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030798167] [2022-11-03 03:56:23,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:23,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:23,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:23,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:23,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:23,120 INFO L87 Difference]: Start difference. First operand 25403 states and 35462 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:24,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:24,084 INFO L93 Difference]: Finished difference Result 48441 states and 66822 transitions. [2022-11-03 03:56:24,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:24,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:56:24,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:24,113 INFO L225 Difference]: With dead ends: 48441 [2022-11-03 03:56:24,113 INFO L226 Difference]: Without dead ends: 41662 [2022-11-03 03:56:24,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:56:24,120 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 268 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:24,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1135 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2022-11-03 03:56:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41662 states. [2022-11-03 03:56:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41662 to 28419. [2022-11-03 03:56:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28419 states, 28418 states have (on average 1.385811809416567) internal successors, (39382), 28418 states have internal predecessors, (39382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28419 states to 28419 states and 39382 transitions. [2022-11-03 03:56:24,599 INFO L78 Accepts]: Start accepts. Automaton has 28419 states and 39382 transitions. Word has length 98 [2022-11-03 03:56:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:24,600 INFO L495 AbstractCegarLoop]: Abstraction has 28419 states and 39382 transitions. [2022-11-03 03:56:24,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 28419 states and 39382 transitions. [2022-11-03 03:56:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:56:24,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:24,712 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:24,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:24,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:24,913 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:24,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1822543115, now seen corresponding path program 1 times [2022-11-03 03:56:24,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:24,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485907533] [2022-11-03 03:56:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:24,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:24,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:24,917 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:24,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 03:56:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:26,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:26,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:26,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485907533] [2022-11-03 03:56:26,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485907533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:26,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:26,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:26,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757485223] [2022-11-03 03:56:26,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:26,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:26,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:26,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:26,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:26,056 INFO L87 Difference]: Start difference. First operand 28419 states and 39382 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:27,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:27,071 INFO L93 Difference]: Finished difference Result 38257 states and 53016 transitions. [2022-11-03 03:56:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:27,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:56:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:27,111 INFO L225 Difference]: With dead ends: 38257 [2022-11-03 03:56:27,112 INFO L226 Difference]: Without dead ends: 34636 [2022-11-03 03:56:27,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:56:27,119 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 168 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:27,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1377 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-11-03 03:56:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34636 states. [2022-11-03 03:56:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34636 to 31691. [2022-11-03 03:56:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31691 states, 31690 states have (on average 1.3734616598295992) internal successors, (43525), 31690 states have internal predecessors, (43525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31691 states to 31691 states and 43525 transitions. [2022-11-03 03:56:27,678 INFO L78 Accepts]: Start accepts. Automaton has 31691 states and 43525 transitions. Word has length 98 [2022-11-03 03:56:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:27,678 INFO L495 AbstractCegarLoop]: Abstraction has 31691 states and 43525 transitions. [2022-11-03 03:56:27,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 31691 states and 43525 transitions. [2022-11-03 03:56:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:56:27,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:27,709 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:56:27,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:27,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:27,909 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:27,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:27,910 INFO L85 PathProgramCache]: Analyzing trace with hash 133599373, now seen corresponding path program 1 times [2022-11-03 03:56:27,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:27,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40968023] [2022-11-03 03:56:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:27,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:27,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:27,912 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:27,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_296da2a3-62b0-4eb0-9576-dd2f9693982c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 03:56:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:28,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:28,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:29,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:29,042 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:29,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40968023] [2022-11-03 03:56:29,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40968023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:29,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:29,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:29,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632763280] [2022-11-03 03:56:29,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:29,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:29,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:29,044 INFO L87 Difference]: Start difference. First operand 31691 states and 43525 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:29,952 INFO L93 Difference]: Finished difference Result 36633 states and 50653 transitions. [2022-11-03 03:56:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:56:29,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2022-11-03 03:56:29,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:29,975 INFO L225 Difference]: With dead ends: 36633 [2022-11-03 03:56:29,976 INFO L226 Difference]: Without dead ends: 33278 [2022-11-03 03:56:29,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 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 03:56:29,982 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 144 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:29,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1170 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-11-03 03:56:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33278 states.