./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 --- 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-4e7fbc6 [2022-11-23 01:46:26,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 01:46:26,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 01:46:26,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 01:46:26,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 01:46:26,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 01:46:26,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 01:46:26,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 01:46:26,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 01:46:26,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 01:46:26,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 01:46:26,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 01:46:26,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 01:46:26,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 01:46:26,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 01:46:26,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 01:46:26,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 01:46:26,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 01:46:26,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 01:46:26,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 01:46:26,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 01:46:26,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 01:46:26,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 01:46:26,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 01:46:26,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 01:46:26,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 01:46:26,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 01:46:26,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 01:46:26,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 01:46:26,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 01:46:26,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 01:46:26,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 01:46:26,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 01:46:26,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 01:46:26,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 01:46:26,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 01:46:26,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 01:46:26,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 01:46:26,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 01:46:26,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 01:46:26,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 01:46:26,447 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 01:46:26,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 01:46:26,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 01:46:26,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 01:46:26,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 01:46:26,492 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 01:46:26,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 01:46:26,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 01:46:26,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 01:46:26,494 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 01:46:26,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 01:46:26,495 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 01:46:26,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 01:46:26,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 01:46:26,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 01:46:26,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 01:46:26,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 01:46:26,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 01:46:26,497 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 01:46:26,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 01:46:26,497 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 01:46:26,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 01:46:26,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 01:46:26,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 01:46:26,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 01:46:26,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:46:26,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 01:46:26,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 01:46:26,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 01:46:26,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 01:46:26,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 01:46:26,499 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 01:46:26,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 01:46:26,500 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 01:46:26,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 01:46:26,500 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 [2022-11-23 01:46:26,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 01:46:26,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 01:46:26,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 01:46:26,838 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 01:46:26,838 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 01:46:26,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2022-11-23 01:46:29,848 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 01:46:30,120 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 01:46:30,121 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2022-11-23 01:46:30,126 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/data/d6b9eaa4c/5beeebc0e50142b6aed79098ab64ba6a/FLAG4816720b4 [2022-11-23 01:46:30,139 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/data/d6b9eaa4c/5beeebc0e50142b6aed79098ab64ba6a [2022-11-23 01:46:30,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 01:46:30,143 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 01:46:30,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 01:46:30,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 01:46:30,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 01:46:30,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47aa190b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30, skipping insertion in model container [2022-11-23 01:46:30,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 01:46:30,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 01:46:30,316 WARN L237 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_6de116b9-7ff9-4a2e-a862-d2fb55076699/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c[537,550] [2022-11-23 01:46:30,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:46:30,341 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 01:46:30,351 WARN L237 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_6de116b9-7ff9-4a2e-a862-d2fb55076699/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c[537,550] [2022-11-23 01:46:30,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:46:30,371 INFO L208 MainTranslator]: Completed translation [2022-11-23 01:46:30,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30 WrapperNode [2022-11-23 01:46:30,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 01:46:30,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 01:46:30,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 01:46:30,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 01:46:30,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,404 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-23 01:46:30,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 01:46:30,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 01:46:30,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 01:46:30,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 01:46:30,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,424 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 01:46:30,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 01:46:30,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 01:46:30,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 01:46:30,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (1/1) ... [2022-11-23 01:46:30,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:46:30,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:46:30,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 01:46:30,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 01:46:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 01:46:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 01:46:30,519 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 01:46:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 01:46:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 01:46:30,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 01:46:30,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 01:46:30,519 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 01:46:30,578 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 01:46:30,580 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 01:46:30,720 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 01:46:30,726 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 01:46:30,727 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 01:46:30,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:46:30 BoogieIcfgContainer [2022-11-23 01:46:30,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 01:46:30,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 01:46:30,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 01:46:30,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 01:46:30,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:46:30" (1/3) ... [2022-11-23 01:46:30,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45579426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:46:30, skipping insertion in model container [2022-11-23 01:46:30,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:30" (2/3) ... [2022-11-23 01:46:30,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45579426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:46:30, skipping insertion in model container [2022-11-23 01:46:30,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:46:30" (3/3) ... [2022-11-23 01:46:30,737 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.c [2022-11-23 01:46:30,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 01:46:30,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 01:46:30,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 01:46:30,809 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=PETRI_NET, 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;@2fac5227, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 01:46:30,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 01:46:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 01:46:30,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 01:46:30,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:46:30,820 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:46:30,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:46:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2022-11-23 01:46:30,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:30,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129948899] [2022-11-23 01:46:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:30,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:30,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 01:46:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:30,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-23 01:46:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:31,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-23 01:46:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 01:46:31,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:31,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129948899] [2022-11-23 01:46:31,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129948899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:46:31,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:46:31,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:46:31,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854534607] [2022-11-23 01:46:31,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:46:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 01:46:31,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 01:46:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 01:46:31,075 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 01:46:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:46:31,097 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2022-11-23 01:46:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 01:46:31,099 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-23 01:46:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:46:31,106 INFO L225 Difference]: With dead ends: 63 [2022-11-23 01:46:31,107 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 01:46:31,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 01:46:31,113 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 01:46:31,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 01:46:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 01:46:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-23 01:46:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 01:46:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-11-23 01:46:31,153 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-11-23 01:46:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:46:31,155 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-11-23 01:46:31,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 01:46:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-11-23 01:46:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 01:46:31,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:46:31,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:46:31,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 01:46:31,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:46:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:31,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2022-11-23 01:46:31,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:31,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199868037] [2022-11-23 01:46:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:31,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:31,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 01:46:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:31,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-23 01:46:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:31,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-23 01:46:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 01:46:31,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:31,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199868037] [2022-11-23 01:46:31,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199868037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:46:31,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:46:31,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 01:46:31,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883789675] [2022-11-23 01:46:31,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:46:31,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 01:46:31,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 01:46:31,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 01:46:31,484 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 01:46:31,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:46:31,602 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-11-23 01:46:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 01:46:31,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-11-23 01:46:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:46:31,604 INFO L225 Difference]: With dead ends: 42 [2022-11-23 01:46:31,604 INFO L226 Difference]: Without dead ends: 40 [2022-11-23 01:46:31,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 01:46:31,605 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 01:46:31,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 01:46:31,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-23 01:46:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-23 01:46:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 01:46:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-23 01:46:31,617 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2022-11-23 01:46:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:46:31,617 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-23 01:46:31,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 01:46:31,618 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-23 01:46:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 01:46:31,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:46:31,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:46:31,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 01:46:31,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:46:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:31,620 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2022-11-23 01:46:31,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:31,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658494296] [2022-11-23 01:46:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:31,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:32,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-23 01:46:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:32,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-23 01:46:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:32,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-23 01:46:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:32,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-23 01:46:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 01:46:32,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:32,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658494296] [2022-11-23 01:46:32,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658494296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:46:32,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:46:32,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 01:46:32,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601116487] [2022-11-23 01:46:32,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:46:32,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 01:46:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:32,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 01:46:32,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 01:46:32,085 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 01:46:32,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:46:32,182 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-11-23 01:46:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 01:46:32,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-23 01:46:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:46:32,188 INFO L225 Difference]: With dead ends: 46 [2022-11-23 01:46:32,189 INFO L226 Difference]: Without dead ends: 44 [2022-11-23 01:46:32,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 01:46:32,191 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 01:46:32,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 01:46:32,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-23 01:46:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-11-23 01:46:32,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 01:46:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-23 01:46:32,215 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2022-11-23 01:46:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:46:32,215 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-23 01:46:32,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 01:46:32,216 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-23 01:46:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 01:46:32,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:46:32,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:46:32,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 01:46:32,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:46:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2022-11-23 01:46:32,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:32,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068608246] [2022-11-23 01:46:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:32,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 01:46:32,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082136756] [2022-11-23 01:46:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:32,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:46:32,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:46:32,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 01:46:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:32,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 01:46:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:46:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 01:46:32,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:46:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 01:46:32,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:32,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068608246] [2022-11-23 01:46:32,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 01:46:32,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082136756] [2022-11-23 01:46:32,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082136756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:46:32,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 01:46:32,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-23 01:46:32,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875348720] [2022-11-23 01:46:32,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 01:46:32,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 01:46:32,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 01:46:32,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-23 01:46:32,836 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 01:46:35,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:46:37,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:46:39,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:46:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:46:39,662 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2022-11-23 01:46:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 01:46:39,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 34 [2022-11-23 01:46:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:46:39,666 INFO L225 Difference]: With dead ends: 76 [2022-11-23 01:46:39,666 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 01:46:39,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-23 01:46:39,668 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 01:46:39,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 164 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 254 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 01:46:39,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 01:46:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-23 01:46:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 38 states have internal predecessors, (39), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-23 01:46:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-11-23 01:46:39,706 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 34 [2022-11-23 01:46:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:46:39,707 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-11-23 01:46:39,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 01:46:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-11-23 01:46:39,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 01:46:39,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:46:39,709 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:46:39,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 01:46:39,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:39,914 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:46:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:39,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2022-11-23 01:46:39,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:39,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910516840] [2022-11-23 01:46:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:39,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:39,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 01:46:39,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112290205] [2022-11-23 01:46:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:39,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:39,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:46:39,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:46:39,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 01:46:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:40,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 01:46:40,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:46:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 01:46:40,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:46:40,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:40,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910516840] [2022-11-23 01:46:40,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 01:46:40,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112290205] [2022-11-23 01:46:40,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112290205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:46:40,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:46:40,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-23 01:46:40,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18758245] [2022-11-23 01:46:40,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:46:40,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 01:46:40,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:40,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 01:46:40,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 01:46:40,256 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 01:46:41,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:46:41,034 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-11-23 01:46:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 01:46:41,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-11-23 01:46:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:46:41,036 INFO L225 Difference]: With dead ends: 72 [2022-11-23 01:46:41,036 INFO L226 Difference]: Without dead ends: 61 [2022-11-23 01:46:41,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-23 01:46:41,038 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 01:46:41,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 01:46:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-23 01:46:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-23 01:46:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-23 01:46:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-11-23 01:46:41,060 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 41 [2022-11-23 01:46:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:46:41,060 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-11-23 01:46:41,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 01:46:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-11-23 01:46:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 01:46:41,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:46:41,062 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:46:41,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 01:46:41,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:41,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:46:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash -421337323, now seen corresponding path program 1 times [2022-11-23 01:46:41,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:41,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165534986] [2022-11-23 01:46:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:41,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 01:46:41,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166009788] [2022-11-23 01:46:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:41,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:46:41,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:46:41,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 01:46:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:41,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 01:46:41,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:46:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-23 01:46:41,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:46:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-23 01:46:43,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:43,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165534986] [2022-11-23 01:46:43,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 01:46:43,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166009788] [2022-11-23 01:46:43,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166009788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:46:43,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 01:46:43,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-11-23 01:46:43,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096484859] [2022-11-23 01:46:43,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 01:46:43,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 01:46:43,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 01:46:43,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-23 01:46:43,864 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-23 01:46:46,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:46:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:46:48,588 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2022-11-23 01:46:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 01:46:48,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 58 [2022-11-23 01:46:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:46:48,591 INFO L225 Difference]: With dead ends: 76 [2022-11-23 01:46:48,591 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 01:46:48,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-23 01:46:48,592 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 01:46:48,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 106 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 01:46:48,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 01:46:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-11-23 01:46:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 47 states have internal predecessors, (48), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-23 01:46:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2022-11-23 01:46:48,620 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 58 [2022-11-23 01:46:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:46:48,621 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2022-11-23 01:46:48,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-23 01:46:48,621 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2022-11-23 01:46:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-23 01:46:48,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:46:48,623 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:46:48,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 01:46:48,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:48,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:46:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:46:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1609951834, now seen corresponding path program 1 times [2022-11-23 01:46:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:46:48,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656722353] [2022-11-23 01:46:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:48,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:46:48,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 01:46:48,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501565672] [2022-11-23 01:46:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:46:48,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:46:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:46:48,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:46:48,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 01:46:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:46:49,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 01:46:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:46:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-23 01:46:49,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:46:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-23 01:46:51,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:46:51,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656722353] [2022-11-23 01:46:51,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 01:46:51,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501565672] [2022-11-23 01:46:51,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501565672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:46:51,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 01:46:51,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 18 [2022-11-23 01:46:51,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26259236] [2022-11-23 01:46:51,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 01:46:51,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 01:46:51,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:46:51,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 01:46:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-23 01:46:51,330 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-23 01:46:56,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 01:46:57,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:47:02,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:47:08,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:47:11,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:47:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:47:11,262 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2022-11-23 01:47:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 01:47:11,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) Word has length 68 [2022-11-23 01:47:11,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:47:11,266 INFO L225 Difference]: With dead ends: 111 [2022-11-23 01:47:11,266 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 01:47:11,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-11-23 01:47:11,267 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 82 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 88 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2022-11-23 01:47:11,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 183 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 574 Invalid, 2 Unknown, 0 Unchecked, 19.4s Time] [2022-11-23 01:47:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 01:47:11,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-11-23 01:47:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.169811320754717) internal successors, (62), 59 states have internal predecessors, (62), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-23 01:47:11,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2022-11-23 01:47:11,302 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 68 [2022-11-23 01:47:11,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:47:11,303 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2022-11-23 01:47:11,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-23 01:47:11,303 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2022-11-23 01:47:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 01:47:11,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:47:11,305 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:47:11,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 01:47:11,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:47:11,511 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:47:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:47:11,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2022-11-23 01:47:11,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:47:11,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423317339] [2022-11-23 01:47:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:47:11,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:47:11,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 01:47:11,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927813759] [2022-11-23 01:47:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:47:11,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:47:11,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:47:11,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:47:11,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 01:47:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:47:11,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 01:47:11,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:47:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-23 01:47:13,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:47:32,917 WARN L233 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:47:58,744 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~d~0#1| 4294967296))) (let ((.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296)) (.cse3 (div .cse1 2))) (or (= .cse0 1) (<= .cse1 .cse2) (not (= .cse1 (mod (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) 4294967296))) (not (<= (mod .cse3 4294967296) .cse2)) (= (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~B~0#1| (div .cse0 2)) (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1| (* 4294967295 .cse3)) 4294967296))))) is different from true [2022-11-23 01:49:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 35 proven. 17 refuted. 2 times theorem prover too weak. 88 trivial. 5 not checked. [2022-11-23 01:49:27,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:49:27,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423317339] [2022-11-23 01:49:27,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 01:49:27,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927813759] [2022-11-23 01:49:27,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927813759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:49:27,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 01:49:27,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2022-11-23 01:49:27,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479140464] [2022-11-23 01:49:27,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 01:49:27,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 01:49:27,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:49:27,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 01:49:27,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=412, Unknown=7, NotChecked=42, Total=552 [2022-11-23 01:49:27,245 INFO L87 Difference]: Start difference. First operand 94 states and 123 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-23 01:49:29,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:49:30,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:49:32,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:49:40,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:49:46,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:49:49,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:49:51,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:49:54,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:51:07,189 WARN L233 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 60 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:51:11,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:51:15,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:51:17,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:51:19,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:51:21,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:51:24,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:51:26,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:52:37,785 WARN L233 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 60 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:52:39,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:52:41,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:52:43,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:53:13,124 WARN L233 SmtUtils]: Spent 20.49s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:53:15,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:53:34,327 WARN L233 SmtUtils]: Spent 16.20s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:53:37,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:53:39,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:53:42,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:53:43,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:54:29,978 WARN L233 SmtUtils]: Spent 41.28s on a formula simplification. DAG size of input: 57 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:54:32,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:54:34,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:54:45,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:54:47,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:54:49,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:54:51,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:54:53,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:55:02,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:55:30,493 WARN L233 SmtUtils]: Spent 16.96s on a formula simplification. DAG size of input: 44 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:55:32,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:55:34,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:55:37,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:55:39,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:55:42,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:55:54,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:55:56,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:55:58,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:01,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:14,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:19,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:21,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:23,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:24,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:28,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:30,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:32,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:34,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:36,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:56:38,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:57:12,097 WARN L233 SmtUtils]: Spent 19.33s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:57:14,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:57:16,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:57:43,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:57:45,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:57:47,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:57:49,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:57:54,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:57:56,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:57:57,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:57:59,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:02,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:04,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:07,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:09,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:11,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:22,848 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 01:58:24,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:28,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:30,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:32,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:34,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:36,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:38,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 01:58:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:58:38,149 INFO L93 Difference]: Finished difference Result 184 states and 246 transitions. [2022-11-23 01:58:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 01:58:38,149 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) Word has length 71 [2022-11-23 01:58:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:58:38,151 INFO L225 Difference]: With dead ends: 184 [2022-11-23 01:58:38,151 INFO L226 Difference]: Without dead ends: 152 [2022-11-23 01:58:38,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 411.0s TimeCoverageRelationStatistics Valid=311, Invalid=1124, Unknown=51, NotChecked=74, Total=1560 [2022-11-23 01:58:38,153 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 146 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 245 mSolverCounterUnsat, 57 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 57 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 180.6s IncrementalHoareTripleChecker+Time [2022-11-23 01:58:38,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 150 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 715 Invalid, 57 Unknown, 80 Unchecked, 180.6s Time] [2022-11-23 01:58:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-23 01:58:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2022-11-23 01:58:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 80 states have (on average 1.175) internal successors, (94), 87 states have internal predecessors, (94), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (40), 34 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-23 01:58:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2022-11-23 01:58:38,226 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 71 [2022-11-23 01:58:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:58:38,227 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2022-11-23 01:58:38,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 20 states have internal predecessors, (41), 11 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 11 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-23 01:58:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2022-11-23 01:58:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 01:58:38,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:58:38,229 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:58:38,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 01:58:38,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 01:58:38,436 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:58:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:58:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2022-11-23 01:58:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:58:38,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044985353] [2022-11-23 01:58:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:58:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:58:38,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 01:58:38,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338089913] [2022-11-23 01:58:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:58:38,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:58:38,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:58:38,447 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:58:38,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 01:58:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:58:38,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 01:58:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:58:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-23 01:58:38,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:58:53,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:58:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044985353] [2022-11-23 01:58:53,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 01:58:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338089913] [2022-11-23 01:58:53,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338089913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:58:53,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 01:58:53,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-23 01:58:53,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404694095] [2022-11-23 01:58:53,145 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 01:58:53,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 01:58:53,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:58:53,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 01:58:53,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=123, Unknown=2, NotChecked=0, Total=156 [2022-11-23 01:58:53,146 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 01:58:54,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:58:54,458 INFO L93 Difference]: Finished difference Result 148 states and 186 transitions. [2022-11-23 01:58:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 01:58:54,459 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2022-11-23 01:58:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:58:54,460 INFO L225 Difference]: With dead ends: 148 [2022-11-23 01:58:54,461 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 01:58:54,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=44, Invalid=164, Unknown=2, NotChecked=0, Total=210 [2022-11-23 01:58:54,462 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 01:58:54,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 158 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 01:58:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 01:58:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-11-23 01:58:54,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 90 states have internal predecessors, (97), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (40), 34 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-23 01:58:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2022-11-23 01:58:54,529 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 82 [2022-11-23 01:58:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:58:54,530 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2022-11-23 01:58:54,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 01:58:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2022-11-23 01:58:54,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 01:58:54,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:58:54,533 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:58:54,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 01:58:54,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 01:58:54,739 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:58:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:58:54,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1729716470, now seen corresponding path program 1 times [2022-11-23 01:58:54,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:58:54,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856184715] [2022-11-23 01:58:54,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:58:54,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:58:54,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 01:58:54,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886133388] [2022-11-23 01:58:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:58:54,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:58:54,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:58:54,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:58:54,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 01:58:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:58:54,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 01:58:54,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:59:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 44 proven. 47 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-23 01:59:36,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:59:41,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:59:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856184715] [2022-11-23 01:59:41,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 01:59:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886133388] [2022-11-23 01:59:41,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886133388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:59:41,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 01:59:41,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-23 01:59:41,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456103894] [2022-11-23 01:59:41,027 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 01:59:41,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 01:59:41,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:59:41,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 01:59:41,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=390, Unknown=3, NotChecked=0, Total=462 [2022-11-23 01:59:41,028 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-23 01:59:45,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 01:59:47,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 01:59:49,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-23 01:59:53,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-23 01:59:55,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-23 01:59:58,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 02:00:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:00:01,009 INFO L93 Difference]: Finished difference Result 159 states and 204 transitions. [2022-11-23 02:00:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 02:00:01,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) Word has length 87 [2022-11-23 02:00:01,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:00:01,012 INFO L225 Difference]: With dead ends: 159 [2022-11-23 02:00:01,012 INFO L226 Difference]: Without dead ends: 151 [2022-11-23 02:00:01,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=103, Invalid=594, Unknown=5, NotChecked=0, Total=702 [2022-11-23 02:00:01,014 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 23 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:00:01,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 232 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 595 Invalid, 4 Unknown, 0 Unchecked, 15.4s Time] [2022-11-23 02:00:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-23 02:00:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2022-11-23 02:00:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 90 states have internal predecessors, (96), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (40), 34 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-23 02:00:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 177 transitions. [2022-11-23 02:00:01,069 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 177 transitions. Word has length 87 [2022-11-23 02:00:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:00:01,069 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 177 transitions. [2022-11-23 02:00:01,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-23 02:00:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 177 transitions. [2022-11-23 02:00:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 02:00:01,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:00:01,071 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:00:01,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:00:01,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 02:00:01,272 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:00:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:00:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash -377336338, now seen corresponding path program 2 times [2022-11-23 02:00:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:00:01,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348463891] [2022-11-23 02:00:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:00:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:00:01,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:00:01,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927921951] [2022-11-23 02:00:01,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:00:01,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:00:01,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:00:01,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:00:01,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:00:01,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:00:01,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:00:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:00:01,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:00:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 67 proven. 9 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-11-23 02:00:01,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:00:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-11-23 02:00:01,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:00:01,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348463891] [2022-11-23 02:00:01,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:00:01,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927921951] [2022-11-23 02:00:01,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927921951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:00:01,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:00:01,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2022-11-23 02:00:01,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263941047] [2022-11-23 02:00:01,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:00:01,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:00:01,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:00:01,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:00:01,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:00:01,720 INFO L87 Difference]: Start difference. First operand 140 states and 177 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-11-23 02:00:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:00:02,099 INFO L93 Difference]: Finished difference Result 165 states and 206 transitions. [2022-11-23 02:00:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:00:02,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 89 [2022-11-23 02:00:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:00:02,101 INFO L225 Difference]: With dead ends: 165 [2022-11-23 02:00:02,101 INFO L226 Difference]: Without dead ends: 126 [2022-11-23 02:00:02,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:00:02,102 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:00:02,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 155 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:00:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-23 02:00:02,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-23 02:00:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 81 states have internal predecessors, (85), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (36), 30 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-23 02:00:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-11-23 02:00:02,159 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 89 [2022-11-23 02:00:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:00:02,159 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-11-23 02:00:02,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-11-23 02:00:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-11-23 02:00:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 02:00:02,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:00:02,162 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:00:02,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 02:00:02,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 02:00:02,372 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:00:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:00:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash 533735918, now seen corresponding path program 2 times [2022-11-23 02:00:02,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:00:02,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175599023] [2022-11-23 02:00:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:00:02,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:00:02,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:00:02,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758550011] [2022-11-23 02:00:02,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:00:02,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:00:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:00:02,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:00:02,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:00:02,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:00:02,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:00:02,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 02:00:02,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:00:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-11-23 02:00:02,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:00:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-11-23 02:00:02,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:00:02,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175599023] [2022-11-23 02:00:02,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:00:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758550011] [2022-11-23 02:00:02,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758550011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:00:02,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:00:02,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-23 02:00:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954880950] [2022-11-23 02:00:02,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:00:02,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:00:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:00:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:00:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:00:02,758 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 8 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2022-11-23 02:00:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:00:04,061 INFO L93 Difference]: Finished difference Result 182 states and 243 transitions. [2022-11-23 02:00:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 02:00:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 8 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 99 [2022-11-23 02:00:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:00:04,063 INFO L225 Difference]: With dead ends: 182 [2022-11-23 02:00:04,063 INFO L226 Difference]: Without dead ends: 153 [2022-11-23 02:00:04,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-23 02:00:04,065 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 21 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:00:04,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 176 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 02:00:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-23 02:00:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2022-11-23 02:00:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 89 states have (on average 1.146067415730337) internal successors, (102), 94 states have internal predecessors, (102), 46 states have call successors, (46), 14 states have call predecessors, (46), 14 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-23 02:00:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 193 transitions. [2022-11-23 02:00:04,122 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 193 transitions. Word has length 99 [2022-11-23 02:00:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:00:04,123 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 193 transitions. [2022-11-23 02:00:04,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 8 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2022-11-23 02:00:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 193 transitions. [2022-11-23 02:00:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 02:00:04,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:00:04,125 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:00:04,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:00:04,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 02:00:04,326 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:00:04,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:00:04,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2022-11-23 02:00:04,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:00:04,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727008209] [2022-11-23 02:00:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:00:04,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:00:04,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:00:04,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543199520] [2022-11-23 02:00:04,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:00:04,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:00:04,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:00:04,335 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:00:04,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6de116b9-7ff9-4a2e-a862-d2fb55076699/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:00:04,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 02:00:04,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:00:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 02:00:04,797 INFO L286 TraceCheckSpWp]: Computing forward predicates...