./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/min-2-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/min-2-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R --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 68785685c781649dca8a870a36ccbd5837fb99f65c0418361b1a73f7848e1bda --- 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-38b53e6 [2022-11-25 16:44:39,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:44:39,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:44:39,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:44:39,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:44:39,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:44:39,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:44:39,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:44:39,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:44:39,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:44:39,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:44:39,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:44:39,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:44:39,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:44:39,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:44:39,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:44:39,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:44:39,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:44:39,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:44:39,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:44:39,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:44:39,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:44:39,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:44:39,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:44:39,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:44:39,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:44:39,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:44:39,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:44:39,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:44:39,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:44:39,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:44:39,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:44:39,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:44:39,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:44:39,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:44:39,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:44:39,508 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:44:39,508 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:44:39,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:44:39,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:44:39,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:44:39,513 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:44:39,560 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:44:39,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:44:39,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:44:39,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:44:39,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:44:39,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:44:39,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:44:39,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:44:39,564 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:44:39,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:44:39,566 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:44:39,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:44:39,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:44:39,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:44:39,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:44:39,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:44:39,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:44:39,567 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:44:39,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:44:39,568 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:44:39,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:44:39,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:44:39,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:44:39,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:44:39,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:44:39,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:44:39,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:44:39,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:44:39,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:44:39,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:44:39,571 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:44:39,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:44:39,572 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:44:39,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:44:39,572 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_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68785685c781649dca8a870a36ccbd5837fb99f65c0418361b1a73f7848e1bda [2022-11-25 16:44:39,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:44:39,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:44:39,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:44:39,931 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:44:39,932 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:44:39,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-multidimensional/min-2-u.c [2022-11-25 16:44:43,322 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:44:43,512 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:44:43,513 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/sv-benchmarks/c/array-multidimensional/min-2-u.c [2022-11-25 16:44:43,525 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/data/4a47c907e/453d91d528bc4ad0bb37e3851144741a/FLAG4888b35cb [2022-11-25 16:44:43,551 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/data/4a47c907e/453d91d528bc4ad0bb37e3851144741a [2022-11-25 16:44:43,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:44:43,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:44:43,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:44:43,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:44:43,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:44:43,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43edf8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43, skipping insertion in model container [2022-11-25 16:44:43,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:44:43,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:44:43,760 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_29f62358-4738-4970-bac8-21bfa31f029f/sv-benchmarks/c/array-multidimensional/min-2-u.c[319,332] [2022-11-25 16:44:43,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:44:43,795 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:44:43,811 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_29f62358-4738-4970-bac8-21bfa31f029f/sv-benchmarks/c/array-multidimensional/min-2-u.c[319,332] [2022-11-25 16:44:43,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:44:43,839 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:44:43,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43 WrapperNode [2022-11-25 16:44:43,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:44:43,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:44:43,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:44:43,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:44:43,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,885 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-25 16:44:43,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:44:43,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:44:43,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:44:43,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:44:43,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,921 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:44:43,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:44:43,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:44:43,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:44:43,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (1/1) ... [2022-11-25 16:44:43,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:44:43,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:43,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:44:43,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:44:44,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:44:44,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:44:44,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:44:44,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:44:44,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:44:44,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:44:44,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:44:44,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:44:44,126 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:44:44,129 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:44:44,393 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:44:44,399 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:44:44,399 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-25 16:44:44,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:44:44 BoogieIcfgContainer [2022-11-25 16:44:44,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:44:44,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:44:44,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:44:44,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:44:44,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:44:43" (1/3) ... [2022-11-25 16:44:44,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c8f116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:44:44, skipping insertion in model container [2022-11-25 16:44:44,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:44:43" (2/3) ... [2022-11-25 16:44:44,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c8f116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:44:44, skipping insertion in model container [2022-11-25 16:44:44,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:44:44" (3/3) ... [2022-11-25 16:44:44,412 INFO L112 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2022-11-25 16:44:44,435 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:44:44,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:44:44,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:44:44,559 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;@2c71d282, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:44:44,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 16:44:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 16:44:44,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:44,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:44,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2022-11-25 16:44:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:44,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272395436] [2022-11-25 16:44:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:44,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:44,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:44:44,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438582476] [2022-11-25 16:44:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:44,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:44,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:44,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:44,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:44:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:44:44,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:44,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:44:44,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:44,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272395436] [2022-11-25 16:44:44,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:44:44,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438582476] [2022-11-25 16:44:44,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438582476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:44,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:44,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:44:44,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147819366] [2022-11-25 16:44:44,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:44,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:44:44,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:44:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:45,005 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:45,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:45,067 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2022-11-25 16:44:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:44:45,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 16:44:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:45,080 INFO L225 Difference]: With dead ends: 47 [2022-11-25 16:44:45,081 INFO L226 Difference]: Without dead ends: 22 [2022-11-25 16:44:45,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:44:45,088 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:45,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:44:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-25 16:44:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-11-25 16:44:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-25 16:44:45,131 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2022-11-25 16:44:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:45,131 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-25 16:44:45,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-25 16:44:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 16:44:45,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:45,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:45,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 16:44:45,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 16:44:45,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:45,336 INFO L85 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2022-11-25 16:44:45,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:45,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817144233] [2022-11-25 16:44:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:45,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:45,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:44:45,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876310869] [2022-11-25 16:44:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:45,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:45,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:45,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:44:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:44:45,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:45,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:44:45,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:45,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817144233] [2022-11-25 16:44:45,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:44:45,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876310869] [2022-11-25 16:44:45,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876310869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:45,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:45,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:44:45,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342847376] [2022-11-25 16:44:45,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:45,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:44:45,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:45,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:44:45,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:45,516 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:45,584 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-11-25 16:44:45,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:44:45,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 16:44:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:45,586 INFO L225 Difference]: With dead ends: 49 [2022-11-25 16:44:45,587 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 16:44:45,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:45,589 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:45,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 23 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:44:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 16:44:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-11-25 16:44:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-11-25 16:44:45,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2022-11-25 16:44:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:45,616 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-11-25 16:44:45,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-11-25 16:44:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 16:44:45,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:45,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:45,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:45,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:45,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:45,825 INFO L85 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2022-11-25 16:44:45,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:45,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209414117] [2022-11-25 16:44:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:45,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:45,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:44:45,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458418529] [2022-11-25 16:44:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:45,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:45,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:45,842 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:45,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:44:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:45,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:44:45,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:46,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:44:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:46,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209414117] [2022-11-25 16:44:46,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:44:46,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458418529] [2022-11-25 16:44:46,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458418529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:46,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:44:46,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 16:44:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795553131] [2022-11-25 16:44:46,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:46,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:44:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:46,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:44:46,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:44:46,108 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:46,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:46,274 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2022-11-25 16:44:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:44:46,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 16:44:46,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:46,280 INFO L225 Difference]: With dead ends: 73 [2022-11-25 16:44:46,280 INFO L226 Difference]: Without dead ends: 53 [2022-11-25 16:44:46,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:44:46,288 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:46,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 41 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:44:46,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-25 16:44:46,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-11-25 16:44:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-11-25 16:44:46,301 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 14 [2022-11-25 16:44:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:46,301 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-11-25 16:44:46,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:46,302 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-11-25 16:44:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 16:44:46,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:46,303 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:46,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 16:44:46,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:46,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:46,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1437205722, now seen corresponding path program 2 times [2022-11-25 16:44:46,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:46,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983984325] [2022-11-25 16:44:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:46,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:46,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:44:46,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959249874] [2022-11-25 16:44:46,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:44:46,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:46,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:46,543 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:46,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:44:46,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 16:44:46,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:44:46,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 16:44:46,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 16:44:46,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:44:46,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:46,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983984325] [2022-11-25 16:44:46,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:44:46,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959249874] [2022-11-25 16:44:46,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959249874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:44:46,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:44:46,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:44:46,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448363421] [2022-11-25 16:44:46,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:44:46,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:44:46,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:46,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:44:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:46,714 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:46,800 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2022-11-25 16:44:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:44:46,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-25 16:44:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:46,804 INFO L225 Difference]: With dead ends: 100 [2022-11-25 16:44:46,805 INFO L226 Difference]: Without dead ends: 82 [2022-11-25 16:44:46,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:44:46,807 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:46,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:44:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-25 16:44:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 45. [2022-11-25 16:44:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-11-25 16:44:46,823 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 17 [2022-11-25 16:44:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:46,824 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-11-25 16:44:46,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-11-25 16:44:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 16:44:46,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:46,825 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:46,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:47,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-25 16:44:47,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:47,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 1 times [2022-11-25 16:44:47,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:47,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563382464] [2022-11-25 16:44:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:47,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:47,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:44:47,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037222220] [2022-11-25 16:44:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:47,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:47,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:47,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:47,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:44:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:44:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 16:44:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 16:44:47,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 16:44:47,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:47,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563382464] [2022-11-25 16:44:47,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:44:47,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037222220] [2022-11-25 16:44:47,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037222220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:47,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:44:47,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-25 16:44:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119198832] [2022-11-25 16:44:47,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:47,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 16:44:47,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 16:44:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-25 16:44:47,439 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:47,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:47,816 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2022-11-25 16:44:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:44:47,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-25 16:44:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:47,823 INFO L225 Difference]: With dead ends: 148 [2022-11-25 16:44:47,824 INFO L226 Difference]: Without dead ends: 106 [2022-11-25 16:44:47,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-11-25 16:44:47,832 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 422 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:47,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 55 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:44:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-25 16:44:47,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2022-11-25 16:44:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 86 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2022-11-25 16:44:47,873 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 32 [2022-11-25 16:44:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:47,873 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2022-11-25 16:44:47,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2022-11-25 16:44:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 16:44:47,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:47,881 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:47,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:48,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:48,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:48,088 INFO L85 PathProgramCache]: Analyzing trace with hash 307149302, now seen corresponding path program 2 times [2022-11-25 16:44:48,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:48,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717457742] [2022-11-25 16:44:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:48,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:48,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:44:48,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466548580] [2022-11-25 16:44:48,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:44:48,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:48,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:48,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:48,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:44:48,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:44:48,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:44:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 16:44:48,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-25 16:44:48,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-25 16:44:48,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:48,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717457742] [2022-11-25 16:44:48,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:44:48,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466548580] [2022-11-25 16:44:48,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466548580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:48,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:44:48,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-25 16:44:48,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834416994] [2022-11-25 16:44:48,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:48,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 16:44:48,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:48,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 16:44:48,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-11-25 16:44:48,789 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:49,547 INFO L93 Difference]: Finished difference Result 298 states and 385 transitions. [2022-11-25 16:44:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 16:44:49,548 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-25 16:44:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:49,552 INFO L225 Difference]: With dead ends: 298 [2022-11-25 16:44:49,553 INFO L226 Difference]: Without dead ends: 214 [2022-11-25 16:44:49,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 16:44:49,557 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 731 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:49,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 123 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:44:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-25 16:44:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 171. [2022-11-25 16:44:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2882352941176471) internal successors, (219), 170 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2022-11-25 16:44:49,614 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 56 [2022-11-25 16:44:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:49,617 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2022-11-25 16:44:49,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2022-11-25 16:44:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-25 16:44:49,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:49,620 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:49,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:49,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:49,827 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:49,828 INFO L85 PathProgramCache]: Analyzing trace with hash 270851446, now seen corresponding path program 3 times [2022-11-25 16:44:49,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:49,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713411589] [2022-11-25 16:44:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:49,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:49,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:44:49,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760921349] [2022-11-25 16:44:49,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:44:49,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:49,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:49,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:44:49,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 16:44:49,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:44:49,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:44:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-11-25 16:44:50,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-11-25 16:44:50,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713411589] [2022-11-25 16:44:50,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:44:50,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760921349] [2022-11-25 16:44:50,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760921349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:50,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:44:50,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 16:44:50,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259842024] [2022-11-25 16:44:50,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:50,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:44:50,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:44:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:44:50,658 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:50,898 INFO L93 Difference]: Finished difference Result 766 states and 981 transitions. [2022-11-25 16:44:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 16:44:50,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-11-25 16:44:50,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:50,903 INFO L225 Difference]: With dead ends: 766 [2022-11-25 16:44:50,903 INFO L226 Difference]: Without dead ends: 694 [2022-11-25 16:44:50,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-25 16:44:50,905 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 103 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:50,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 33 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:44:50,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-25 16:44:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 378. [2022-11-25 16:44:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.312997347480106) internal successors, (495), 377 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 495 transitions. [2022-11-25 16:44:50,967 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 495 transitions. Word has length 104 [2022-11-25 16:44:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:50,968 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 495 transitions. [2022-11-25 16:44:50,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 495 transitions. [2022-11-25 16:44:50,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-25 16:44:50,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:50,973 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:50,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:44:51,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 16:44:51,180 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:44:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:44:51,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1665112998, now seen corresponding path program 4 times [2022-11-25 16:44:51,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:44:51,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329181322] [2022-11-25 16:44:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:44:51,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:44:51,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:44:51,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249126236] [2022-11-25 16:44:51,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:44:51,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:44:51,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:44:51,239 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:44:51,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:44:51,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:44:51,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:44:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 16:44:51,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:44:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-11-25 16:44:53,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:44:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-11-25 16:44:54,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:44:54,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329181322] [2022-11-25 16:44:54,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:44:54,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249126236] [2022-11-25 16:44:54,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249126236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:44:54,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:44:54,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-11-25 16:44:54,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986402512] [2022-11-25 16:44:54,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:44:54,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-25 16:44:54,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:44:54,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-25 16:44:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1145, Invalid=2161, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 16:44:54,587 INFO L87 Difference]: Start difference. First operand 378 states and 495 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:44:59,596 INFO L93 Difference]: Finished difference Result 1965 states and 2419 transitions. [2022-11-25 16:44:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-25 16:44:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2022-11-25 16:44:59,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:44:59,639 INFO L225 Difference]: With dead ends: 1965 [2022-11-25 16:44:59,639 INFO L226 Difference]: Without dead ends: 1893 [2022-11-25 16:44:59,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10069 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8406, Invalid=18000, Unknown=0, NotChecked=0, Total=26406 [2022-11-25 16:44:59,650 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 851 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 16:44:59,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 992 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 1635 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 16:44:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2022-11-25 16:44:59,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 792. [2022-11-25 16:44:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 1.3236409608091024) internal successors, (1047), 791 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1047 transitions. [2022-11-25 16:44:59,762 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1047 transitions. Word has length 311 [2022-11-25 16:44:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:44:59,764 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1047 transitions. [2022-11-25 16:44:59,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:44:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1047 transitions. [2022-11-25 16:44:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-11-25 16:44:59,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:44:59,796 INFO L195 NwaCegarLoop]: trace histogram [220, 220, 220, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:44:59,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 16:45:00,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:00,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:45:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:45:00,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1543634522, now seen corresponding path program 5 times [2022-11-25 16:45:00,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:45:00,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759024456] [2022-11-25 16:45:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:45:00,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:45:00,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:45:00,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407050619] [2022-11-25 16:45:00,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:45:00,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:45:00,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:45:00,139 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:45:00,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:54:14,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 184 check-sat command(s) [2022-11-25 16:54:14,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 2094 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 16:54:14,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 74869 backedges. 34471 proven. 715 refuted. 0 times theorem prover too weak. 39683 trivial. 0 not checked. [2022-11-25 16:54:15,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 74869 backedges. 31477 proven. 3709 refuted. 0 times theorem prover too weak. 39683 trivial. 0 not checked. [2022-11-25 16:54:16,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:16,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759024456] [2022-11-25 16:54:16,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:54:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407050619] [2022-11-25 16:54:16,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407050619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:16,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:54:16,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-11-25 16:54:16,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785736005] [2022-11-25 16:54:16,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:16,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-25 16:54:16,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:16,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-25 16:54:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 16:54:16,405 INFO L87 Difference]: Start difference. First operand 792 states and 1047 transitions. Second operand has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:18,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:18,396 INFO L93 Difference]: Finished difference Result 2488 states and 3505 transitions. [2022-11-25 16:54:18,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 16:54:18,397 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 725 [2022-11-25 16:54:18,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:18,404 INFO L225 Difference]: With dead ends: 2488 [2022-11-25 16:54:18,404 INFO L226 Difference]: Without dead ends: 1699 [2022-11-25 16:54:18,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1471 GetRequests, 1400 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 16:54:18,409 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1009 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:18,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1009 Valid, 210 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 16:54:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-11-25 16:54:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1608. [2022-11-25 16:54:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 1.3235843186060983) internal successors, (2127), 1607 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2127 transitions. [2022-11-25 16:54:18,581 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2127 transitions. Word has length 725 [2022-11-25 16:54:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:18,582 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2127 transitions. [2022-11-25 16:54:18,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2127 transitions. [2022-11-25 16:54:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1470 [2022-11-25 16:54:18,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:18,664 INFO L195 NwaCegarLoop]: trace histogram [460, 460, 460, 46, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:18,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 16:54:18,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:18,871 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:54:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash 467146662, now seen corresponding path program 6 times [2022-11-25 16:54:18,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:18,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085523780] [2022-11-25 16:54:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:19,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:54:19,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737405354] [2022-11-25 16:54:19,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:54:19,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:19,013 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:19,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:54:19,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 16:54:19,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:19,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:54:19,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 322537 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 322536 trivial. 0 not checked. [2022-11-25 16:54:19,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 322537 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 322536 trivial. 0 not checked. [2022-11-25 16:54:19,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:19,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085523780] [2022-11-25 16:54:19,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:54:19,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737405354] [2022-11-25 16:54:19,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737405354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:19,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:54:19,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-25 16:54:19,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232556080] [2022-11-25 16:54:19,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:19,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:54:19,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:54:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:54:19,876 INFO L87 Difference]: Start difference. First operand 1608 states and 2127 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:20,150 INFO L93 Difference]: Finished difference Result 3311 states and 4353 transitions. [2022-11-25 16:54:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:54:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1469 [2022-11-25 16:54:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:20,157 INFO L225 Difference]: With dead ends: 3311 [2022-11-25 16:54:20,157 INFO L226 Difference]: Without dead ends: 1755 [2022-11-25 16:54:20,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2936 GetRequests, 2932 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:54:20,161 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:20,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 52 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:54:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2022-11-25 16:54:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1755. [2022-11-25 16:54:20,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 1.298175598631699) internal successors, (2277), 1754 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2277 transitions. [2022-11-25 16:54:20,382 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2277 transitions. Word has length 1469 [2022-11-25 16:54:20,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:20,383 INFO L495 AbstractCegarLoop]: Abstraction has 1755 states and 2277 transitions. [2022-11-25 16:54:20,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:20,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2277 transitions. [2022-11-25 16:54:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1617 [2022-11-25 16:54:20,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:20,405 INFO L195 NwaCegarLoop]: trace histogram [460, 460, 460, 184, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:20,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:20,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:20,607 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:54:20,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash -317084805, now seen corresponding path program 7 times [2022-11-25 16:54:20,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:20,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158897135] [2022-11-25 16:54:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:20,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:20,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:54:20,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201307021] [2022-11-25 16:54:20,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:54:20,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:20,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:20,782 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:20,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:54:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:54:22,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 5490 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 16:54:22,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 339049 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 331337 trivial. 0 not checked. [2022-11-25 16:54:23,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 339049 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 331337 trivial. 0 not checked. [2022-11-25 16:54:26,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:26,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158897135] [2022-11-25 16:54:26,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:54:26,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201307021] [2022-11-25 16:54:26,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201307021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:26,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:54:26,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-11-25 16:54:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028921990] [2022-11-25 16:54:26,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:26,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-25 16:54:26,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:26,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-25 16:54:26,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-11-25 16:54:26,097 INFO L87 Difference]: Start difference. First operand 1755 states and 2277 transitions. Second operand has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:54:33,309 INFO L93 Difference]: Finished difference Result 5423 states and 7621 transitions. [2022-11-25 16:54:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-25 16:54:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1616 [2022-11-25 16:54:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:54:33,322 INFO L225 Difference]: With dead ends: 5423 [2022-11-25 16:54:33,322 INFO L226 Difference]: Without dead ends: 3718 [2022-11-25 16:54:33,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3277 GetRequests, 3134 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-11-25 16:54:33,332 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2723 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2723 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:54:33,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2723 Valid, 427 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 16:54:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2022-11-25 16:54:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3531. [2022-11-25 16:54:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 1.2977337110481586) internal successors, (4581), 3530 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 4581 transitions. [2022-11-25 16:54:33,696 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 4581 transitions. Word has length 1616 [2022-11-25 16:54:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:54:33,697 INFO L495 AbstractCegarLoop]: Abstraction has 3531 states and 4581 transitions. [2022-11-25 16:54:33,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 98 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:54:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 4581 transitions. [2022-11-25 16:54:33,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3249 [2022-11-25 16:54:33,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:54:33,799 INFO L195 NwaCegarLoop]: trace histogram [940, 940, 940, 376, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:54:33,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:54:34,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:34,017 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:54:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:54:34,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1104229509, now seen corresponding path program 8 times [2022-11-25 16:54:34,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:54:34,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488255244] [2022-11-25 16:54:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:54:34,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:54:34,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:54:34,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157794032] [2022-11-25 16:54:34,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:54:34,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:54:34,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:54:34,333 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:54:34,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:54:36,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:54:36,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:54:37,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 11058 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 16:54:37,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:54:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1405561 backedges. 27079 proven. 4465 refuted. 0 times theorem prover too weak. 1374017 trivial. 0 not checked. [2022-11-25 16:54:42,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:54:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1405561 backedges. 27079 proven. 4465 refuted. 0 times theorem prover too weak. 1374017 trivial. 0 not checked. [2022-11-25 16:54:50,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:54:50,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488255244] [2022-11-25 16:54:50,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:54:50,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157794032] [2022-11-25 16:54:50,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157794032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:54:50,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:54:50,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-11-25 16:54:50,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33502380] [2022-11-25 16:54:50,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:54:50,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-11-25 16:54:50,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:54:50,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-11-25 16:54:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-11-25 16:54:50,797 INFO L87 Difference]: Start difference. First operand 3531 states and 4581 transitions. Second operand has 194 states, 194 states have (on average 1.097938144329897) internal successors, (213), 194 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:38,215 INFO L93 Difference]: Finished difference Result 10895 states and 15301 transitions. [2022-11-25 16:55:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-25 16:55:38,216 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.097938144329897) internal successors, (213), 194 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3248 [2022-11-25 16:55:38,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:38,238 INFO L225 Difference]: With dead ends: 10895 [2022-11-25 16:55:38,238 INFO L226 Difference]: Without dead ends: 7462 [2022-11-25 16:55:38,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6589 GetRequests, 6302 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-11-25 16:55:38,251 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8071 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 1975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8071 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 3144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1975 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:38,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8071 Valid, 795 Invalid, 3144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1975 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 16:55:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2022-11-25 16:55:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 7083. [2022-11-25 16:55:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 1.2975148263202485) internal successors, (9189), 7082 states have internal predecessors, (9189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 9189 transitions. [2022-11-25 16:55:38,978 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 9189 transitions. Word has length 3248 [2022-11-25 16:55:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:38,979 INFO L495 AbstractCegarLoop]: Abstraction has 7083 states and 9189 transitions. [2022-11-25 16:55:38,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.097938144329897) internal successors, (213), 194 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 9189 transitions. [2022-11-25 16:55:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6513 [2022-11-25 16:55:39,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:39,204 INFO L195 NwaCegarLoop]: trace histogram [1900, 1900, 1900, 760, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:39,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 16:55:39,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 16:55:39,405 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:55:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:39,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1384713083, now seen corresponding path program 9 times [2022-11-25 16:55:39,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:39,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755596986] [2022-11-25 16:55:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:39,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:39,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:55:39,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230449355] [2022-11-25 16:55:39,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:55:39,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:39,923 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:39,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:55:41,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 16:55:41,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:55:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 16:55:41,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5722777 backedges. 3818 proven. 0 refuted. 0 times theorem prover too weak. 5718959 trivial. 0 not checked. [2022-11-25 16:55:45,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:55:45,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:45,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755596986] [2022-11-25 16:55:45,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:55:45,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230449355] [2022-11-25 16:55:45,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230449355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:55:45,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:55:45,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:55:45,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958351379] [2022-11-25 16:55:45,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:55:45,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:55:45,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:45,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:55:45,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:55:45,130 INFO L87 Difference]: Start difference. First operand 7083 states and 9189 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:45,902 INFO L93 Difference]: Finished difference Result 13954 states and 18349 transitions. [2022-11-25 16:55:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 16:55:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6512 [2022-11-25 16:55:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:45,922 INFO L225 Difference]: With dead ends: 13954 [2022-11-25 16:55:45,922 INFO L226 Difference]: Without dead ends: 7650 [2022-11-25 16:55:45,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6512 GetRequests, 6507 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-25 16:55:45,930 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:45,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 28 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:55:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2022-11-25 16:55:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 7083. [2022-11-25 16:55:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 1.2973736232702626) internal successors, (9188), 7082 states have internal predecessors, (9188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 9188 transitions. [2022-11-25 16:55:46,479 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 9188 transitions. Word has length 6512 [2022-11-25 16:55:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:46,481 INFO L495 AbstractCegarLoop]: Abstraction has 7083 states and 9188 transitions. [2022-11-25 16:55:46,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:55:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 9188 transitions. [2022-11-25 16:55:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6513 [2022-11-25 16:55:46,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:46,746 INFO L195 NwaCegarLoop]: trace histogram [1900, 1900, 1899, 760, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:46,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:46,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 16:55:46,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:55:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:46,961 INFO L85 PathProgramCache]: Analyzing trace with hash 355652793, now seen corresponding path program 1 times [2022-11-25 16:55:46,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:46,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93732868] [2022-11-25 16:55:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:46,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:47,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:55:47,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395272424] [2022-11-25 16:55:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:47,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:47,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:47,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:47,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f62358-4738-4970-bac8-21bfa31f029f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 16:55:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:53,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 22192 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-25 16:55:53,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5722777 backedges. 109447 proven. 18145 refuted. 0 times theorem prover too weak. 5595185 trivial. 0 not checked. [2022-11-25 16:56:11,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5722777 backedges. 109447 proven. 18145 refuted. 0 times theorem prover too weak. 5595185 trivial. 0 not checked. [2022-11-25 16:56:45,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:45,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93732868] [2022-11-25 16:56:45,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395272424] [2022-11-25 16:56:45,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395272424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:45,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:45,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 386 [2022-11-25 16:56:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92633878] [2022-11-25 16:56:45,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:45,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2022-11-25 16:56:45,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2022-11-25 16:56:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73923, Invalid=74687, Unknown=0, NotChecked=0, Total=148610 [2022-11-25 16:56:45,138 INFO L87 Difference]: Start difference. First operand 7083 states and 9188 transitions. Second operand has 386 states, 386 states have (on average 1.0518134715025906) internal successors, (406), 386 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)