./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --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 7cb9b30dbc4292cb9b2a5d2ba3cd92c29fce78cf71613b08638f29c6cc332119 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:20:54,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:20:54,818 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:20:54,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:20:54,822 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:20:54,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:20:54,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:20:54,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:20:54,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:20:54,848 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:20:54,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:20:54,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:20:54,850 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:20:54,851 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:20:54,851 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:20:54,852 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:20:54,852 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:20:54,853 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:20:54,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:20:54,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:20:54,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:20:54,857 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:20:54,857 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:20:54,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:20:54,858 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:20:54,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:20:54,859 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:20:54,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:20:54,860 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:20:54,860 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:20:54,861 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:20:54,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:20:54,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:20:54,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:20:54,862 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:20:54,862 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:20:54,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:20:54,863 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:20:54,863 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:20:54,863 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:20:54,863 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:20:54,864 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:20:54,864 INFO L153 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_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cb9b30dbc4292cb9b2a5d2ba3cd92c29fce78cf71613b08638f29c6cc332119 [2023-11-29 03:20:55,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:20:55,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:20:55,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:20:55,151 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:20:55,151 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:20:55,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i [2023-11-29 03:20:58,024 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:20:58,240 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:20:58,241 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i [2023-11-29 03:20:58,254 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/data/1acc97a4c/7c509eaac3f4459b9281871162d2e459/FLAG0563a0beb [2023-11-29 03:20:58,267 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/data/1acc97a4c/7c509eaac3f4459b9281871162d2e459 [2023-11-29 03:20:58,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:20:58,271 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:20:58,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:20:58,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:20:58,278 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:20:58,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5390032e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58, skipping insertion in model container [2023-11-29 03:20:58,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,334 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:20:58,478 WARN L240 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_d06f755e-9a9c-4337-8329-fa913480b60a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i[916,929] [2023-11-29 03:20:58,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:20:58,626 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:20:58,638 WARN L240 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_d06f755e-9a9c-4337-8329-fa913480b60a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-53.i[916,929] [2023-11-29 03:20:58,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:20:58,727 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:20:58,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58 WrapperNode [2023-11-29 03:20:58,728 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:20:58,729 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:20:58,729 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:20:58,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:20:58,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,754 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,816 INFO L138 Inliner]: procedures = 26, calls = 58, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 398 [2023-11-29 03:20:58,816 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:20:58,817 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:20:58,817 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:20:58,817 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:20:58,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,829 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,839 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,875 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 03:20:58,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,899 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,922 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,951 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,980 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:20:58,981 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:20:58,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:20:58,982 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:20:58,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (1/1) ... [2023-11-29 03:20:58,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:20:59,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:20:59,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:20:59,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:20:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:20:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 03:20:59,047 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 03:20:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:20:59,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:20:59,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:20:59,151 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:20:59,152 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:20:59,791 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:20:59,832 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:20:59,833 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 03:20:59,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:20:59 BoogieIcfgContainer [2023-11-29 03:20:59,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:20:59,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:20:59,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:20:59,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:20:59,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:20:58" (1/3) ... [2023-11-29 03:20:59,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c64833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:20:59, skipping insertion in model container [2023-11-29 03:20:59,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:20:58" (2/3) ... [2023-11-29 03:20:59,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c64833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:20:59, skipping insertion in model container [2023-11-29 03:20:59,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:20:59" (3/3) ... [2023-11-29 03:20:59,842 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-53.i [2023-11-29 03:20:59,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:20:59,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:20:59,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:20:59,933 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=LoopHeads, 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;@2f056eea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:20:59,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:20:59,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 111 states have (on average 1.5225225225225225) internal successors, (169), 112 states have internal predecessors, (169), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-29 03:20:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-11-29 03:20:59,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:20:59,960 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:20:59,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:20:59,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:20:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash -129605698, now seen corresponding path program 1 times [2023-11-29 03:20:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:20:59,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671767778] [2023-11-29 03:20:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:20:59,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:00,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:00,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671767778] [2023-11-29 03:21:00,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 03:21:00,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839319933] [2023-11-29 03:21:00,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:00,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:00,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:00,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:21:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:00,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 03:21:00,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2023-11-29 03:21:00,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:21:00,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839319933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:21:00,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:21:00,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:21:00,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723985669] [2023-11-29 03:21:00,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:21:00,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:21:00,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:00,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:21:00,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:21:00,646 INFO L87 Difference]: Start difference. First operand has 159 states, 111 states have (on average 1.5225225225225225) internal successors, (169), 112 states have internal predecessors, (169), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) Second operand has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-29 03:21:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:00,696 INFO L93 Difference]: Finished difference Result 313 states and 557 transitions. [2023-11-29 03:21:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:21:00,699 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) Word has length 301 [2023-11-29 03:21:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:00,709 INFO L225 Difference]: With dead ends: 313 [2023-11-29 03:21:00,710 INFO L226 Difference]: Without dead ends: 155 [2023-11-29 03:21:00,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:21:00,719 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:00,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 246 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:21:00,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-29 03:21:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2023-11-29 03:21:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-29 03:21:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 249 transitions. [2023-11-29 03:21:00,800 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 249 transitions. Word has length 301 [2023-11-29 03:21:00,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:00,801 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 249 transitions. [2023-11-29 03:21:00,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-29 03:21:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 249 transitions. [2023-11-29 03:21:00,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-11-29 03:21:00,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:00,811 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:00,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:21:01,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 03:21:01,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:01,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:01,013 INFO L85 PathProgramCache]: Analyzing trace with hash 194014204, now seen corresponding path program 1 times [2023-11-29 03:21:01,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:01,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654862950] [2023-11-29 03:21:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:01,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:01,114 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:01,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745507813] [2023-11-29 03:21:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:01,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:01,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:01,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:01,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:21:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:01,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 03:21:01,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:21:01,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:21:01,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:01,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654862950] [2023-11-29 03:21:01,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:01,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745507813] [2023-11-29 03:21:01,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745507813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:21:01,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:21:01,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:21:01,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058213674] [2023-11-29 03:21:01,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:21:01,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:21:01,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:21:01,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:21:01,492 INFO L87 Difference]: Start difference. First operand 155 states and 249 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:01,590 INFO L93 Difference]: Finished difference Result 452 states and 725 transitions. [2023-11-29 03:21:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:21:01,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 301 [2023-11-29 03:21:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:01,597 INFO L225 Difference]: With dead ends: 452 [2023-11-29 03:21:01,597 INFO L226 Difference]: Without dead ends: 298 [2023-11-29 03:21:01,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:21:01,601 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 227 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:01,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 678 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:21:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-29 03:21:01,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 173. [2023-11-29 03:21:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 126 states have (on average 1.4841269841269842) internal successors, (187), 126 states have internal predecessors, (187), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-29 03:21:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 277 transitions. [2023-11-29 03:21:01,634 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 277 transitions. Word has length 301 [2023-11-29 03:21:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:01,637 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 277 transitions. [2023-11-29 03:21:01,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 277 transitions. [2023-11-29 03:21:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-11-29 03:21:01,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:01,644 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:01,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:21:01,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:01,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:01,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1534726916, now seen corresponding path program 1 times [2023-11-29 03:21:01,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:01,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574398047] [2023-11-29 03:21:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:01,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:01,918 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:01,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668203343] [2023-11-29 03:21:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:01,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:01,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:01,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:01,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:21:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:02,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:21:02,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1892 proven. 48 refuted. 0 times theorem prover too weak. 2020 trivial. 0 not checked. [2023-11-29 03:21:02,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 84 proven. 48 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:02,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:02,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574398047] [2023-11-29 03:21:02,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:02,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668203343] [2023-11-29 03:21:02,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668203343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:02,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:02,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 03:21:02,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455303592] [2023-11-29 03:21:02,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:02,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:21:02,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:02,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:21:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:21:02,717 INFO L87 Difference]: Start difference. First operand 173 states and 277 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-29 03:21:03,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:03,060 INFO L93 Difference]: Finished difference Result 351 states and 558 transitions. [2023-11-29 03:21:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 03:21:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 301 [2023-11-29 03:21:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:03,064 INFO L225 Difference]: With dead ends: 351 [2023-11-29 03:21:03,064 INFO L226 Difference]: Without dead ends: 179 [2023-11-29 03:21:03,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 594 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:21:03,067 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 173 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:03,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 493 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:21:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-29 03:21:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2023-11-29 03:21:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 129 states have (on average 1.4651162790697674) internal successors, (189), 129 states have internal predecessors, (189), 45 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-29 03:21:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 279 transitions. [2023-11-29 03:21:03,106 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 279 transitions. Word has length 301 [2023-11-29 03:21:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:03,108 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 279 transitions. [2023-11-29 03:21:03,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 4 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-29 03:21:03,108 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 279 transitions. [2023-11-29 03:21:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-29 03:21:03,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:03,110 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:03,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 03:21:03,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:03,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:03,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:03,312 INFO L85 PathProgramCache]: Analyzing trace with hash -345257536, now seen corresponding path program 1 times [2023-11-29 03:21:03,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:03,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172033767] [2023-11-29 03:21:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:03,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:03,375 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:03,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910767943] [2023-11-29 03:21:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:03,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:03,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:03,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:03,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:21:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:03,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 03:21:03,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:21:04,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:21:04,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:04,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172033767] [2023-11-29 03:21:04,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:04,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910767943] [2023-11-29 03:21:04,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910767943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:21:04,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:21:04,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:21:04,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246409192] [2023-11-29 03:21:04,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:21:04,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:21:04,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:21:04,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:21:04,004 INFO L87 Difference]: Start difference. First operand 177 states and 279 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:04,264 INFO L93 Difference]: Finished difference Result 590 states and 931 transitions. [2023-11-29 03:21:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:21:04,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 302 [2023-11-29 03:21:04,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:04,269 INFO L225 Difference]: With dead ends: 590 [2023-11-29 03:21:04,269 INFO L226 Difference]: Without dead ends: 414 [2023-11-29 03:21:04,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:21:04,282 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 377 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:04,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1044 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:21:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-11-29 03:21:04,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 351. [2023-11-29 03:21:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 256 states have (on average 1.46484375) internal successors, (375), 256 states have internal predecessors, (375), 90 states have call successors, (90), 4 states have call predecessors, (90), 4 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-29 03:21:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 555 transitions. [2023-11-29 03:21:04,337 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 555 transitions. Word has length 302 [2023-11-29 03:21:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:04,338 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 555 transitions. [2023-11-29 03:21:04,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 555 transitions. [2023-11-29 03:21:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-29 03:21:04,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:04,341 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:04,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:21:04,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:04,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:04,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:04,549 INFO L85 PathProgramCache]: Analyzing trace with hash 548228802, now seen corresponding path program 1 times [2023-11-29 03:21:04,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:04,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898949457] [2023-11-29 03:21:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:04,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:04,606 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:04,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984858282] [2023-11-29 03:21:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:04,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:04,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:04,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:04,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:21:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:04,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 03:21:04,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:21:05,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:21:05,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:05,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898949457] [2023-11-29 03:21:05,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:05,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984858282] [2023-11-29 03:21:05,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984858282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:21:05,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:21:05,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:21:05,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13280570] [2023-11-29 03:21:05,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:21:05,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:21:05,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:21:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:21:05,953 INFO L87 Difference]: Start difference. First operand 351 states and 555 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:06,439 INFO L93 Difference]: Finished difference Result 881 states and 1394 transitions. [2023-11-29 03:21:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:21:06,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 302 [2023-11-29 03:21:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:06,446 INFO L225 Difference]: With dead ends: 881 [2023-11-29 03:21:06,446 INFO L226 Difference]: Without dead ends: 705 [2023-11-29 03:21:06,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:21:06,448 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 399 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:06,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 990 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:21:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2023-11-29 03:21:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 466. [2023-11-29 03:21:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 324 states have (on average 1.4320987654320987) internal successors, (464), 324 states have internal predecessors, (464), 135 states have call successors, (135), 6 states have call predecessors, (135), 6 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-29 03:21:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 734 transitions. [2023-11-29 03:21:06,532 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 734 transitions. Word has length 302 [2023-11-29 03:21:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:06,533 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 734 transitions. [2023-11-29 03:21:06,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 734 transitions. [2023-11-29 03:21:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-29 03:21:06,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:06,537 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:06,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 03:21:06,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:06,738 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:06,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:06,738 INFO L85 PathProgramCache]: Analyzing trace with hash 970930628, now seen corresponding path program 1 times [2023-11-29 03:21:06,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:06,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272316401] [2023-11-29 03:21:06,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:06,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:06,786 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:06,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881167407] [2023-11-29 03:21:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:06,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:06,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:06,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:21:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:07,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:21:07,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1836 proven. 132 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2023-11-29 03:21:07,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:08,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:08,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272316401] [2023-11-29 03:21:08,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:08,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881167407] [2023-11-29 03:21:08,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881167407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:08,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:08,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-29 03:21:08,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760768011] [2023-11-29 03:21:08,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:08,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:21:08,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:21:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:21:08,165 INFO L87 Difference]: Start difference. First operand 466 states and 734 transitions. Second operand has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 4 states have call successors, (89), 3 states have call predecessors, (89), 5 states have return successors, (90), 3 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:21:08,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:08,795 INFO L93 Difference]: Finished difference Result 1155 states and 1802 transitions. [2023-11-29 03:21:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:21:08,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 4 states have call successors, (89), 3 states have call predecessors, (89), 5 states have return successors, (90), 3 states have call predecessors, (90), 4 states have call successors, (90) Word has length 302 [2023-11-29 03:21:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:08,801 INFO L225 Difference]: With dead ends: 1155 [2023-11-29 03:21:08,801 INFO L226 Difference]: Without dead ends: 797 [2023-11-29 03:21:08,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 592 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2023-11-29 03:21:08,803 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 547 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:08,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 750 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:21:08,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2023-11-29 03:21:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 493. [2023-11-29 03:21:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 345 states have (on average 1.4057971014492754) internal successors, (485), 345 states have internal predecessors, (485), 135 states have call successors, (135), 12 states have call predecessors, (135), 12 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-29 03:21:08,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 755 transitions. [2023-11-29 03:21:08,850 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 755 transitions. Word has length 302 [2023-11-29 03:21:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:08,851 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 755 transitions. [2023-11-29 03:21:08,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 4 states have call successors, (89), 3 states have call predecessors, (89), 5 states have return successors, (90), 3 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:21:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 755 transitions. [2023-11-29 03:21:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-29 03:21:08,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:08,854 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:08,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:21:09,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 03:21:09,055 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:09,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:09,055 INFO L85 PathProgramCache]: Analyzing trace with hash 461457538, now seen corresponding path program 1 times [2023-11-29 03:21:09,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:09,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720246757] [2023-11-29 03:21:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:09,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:09,110 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:09,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406136691] [2023-11-29 03:21:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:09,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:09,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:09,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:09,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:21:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:09,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:21:09,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1518 proven. 99 refuted. 0 times theorem prover too weak. 2343 trivial. 0 not checked. [2023-11-29 03:21:09,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 33 proven. 99 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:09,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:09,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720246757] [2023-11-29 03:21:09,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:09,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406136691] [2023-11-29 03:21:09,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406136691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:09,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:09,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 03:21:09,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332178752] [2023-11-29 03:21:09,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:09,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 03:21:09,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:09,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 03:21:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:21:09,886 INFO L87 Difference]: Start difference. First operand 493 states and 755 transitions. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) [2023-11-29 03:21:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:10,394 INFO L93 Difference]: Finished difference Result 904 states and 1375 transitions. [2023-11-29 03:21:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 03:21:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) Word has length 302 [2023-11-29 03:21:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:10,400 INFO L225 Difference]: With dead ends: 904 [2023-11-29 03:21:10,400 INFO L226 Difference]: Without dead ends: 517 [2023-11-29 03:21:10,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:21:10,402 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 373 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:10,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 473 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:21:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2023-11-29 03:21:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 505. [2023-11-29 03:21:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 354 states have (on average 1.387005649717514) internal successors, (491), 354 states have internal predecessors, (491), 135 states have call successors, (135), 15 states have call predecessors, (135), 15 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-29 03:21:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 761 transitions. [2023-11-29 03:21:10,460 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 761 transitions. Word has length 302 [2023-11-29 03:21:10,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:10,461 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 761 transitions. [2023-11-29 03:21:10,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) [2023-11-29 03:21:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 761 transitions. [2023-11-29 03:21:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-29 03:21:10,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:10,464 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:10,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:21:10,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 03:21:10,665 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:10,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:10,666 INFO L85 PathProgramCache]: Analyzing trace with hash 67090752, now seen corresponding path program 1 times [2023-11-29 03:21:10,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:10,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256572367] [2023-11-29 03:21:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:10,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:10,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:10,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142199987] [2023-11-29 03:21:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:10,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:10,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:10,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:10,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:21:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:10,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:21:10,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1934 proven. 51 refuted. 0 times theorem prover too weak. 1975 trivial. 0 not checked. [2023-11-29 03:21:11,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 81 proven. 51 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:11,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:11,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256572367] [2023-11-29 03:21:11,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:11,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142199987] [2023-11-29 03:21:11,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142199987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:11,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:11,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 03:21:11,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535456164] [2023-11-29 03:21:11,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:11,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 03:21:11,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:11,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 03:21:11,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:21:11,362 INFO L87 Difference]: Start difference. First operand 505 states and 761 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-29 03:21:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:11,988 INFO L93 Difference]: Finished difference Result 1334 states and 1990 transitions. [2023-11-29 03:21:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 03:21:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) Word has length 302 [2023-11-29 03:21:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:11,996 INFO L225 Difference]: With dead ends: 1334 [2023-11-29 03:21:11,996 INFO L226 Difference]: Without dead ends: 943 [2023-11-29 03:21:11,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 595 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 03:21:11,999 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 576 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:11,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 756 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:21:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-11-29 03:21:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 675. [2023-11-29 03:21:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 521 states have (on average 1.416506717850288) internal successors, (738), 521 states have internal predecessors, (738), 135 states have call successors, (135), 18 states have call predecessors, (135), 18 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-29 03:21:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1008 transitions. [2023-11-29 03:21:12,062 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1008 transitions. Word has length 302 [2023-11-29 03:21:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:12,063 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 1008 transitions. [2023-11-29 03:21:12,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 2 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-29 03:21:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1008 transitions. [2023-11-29 03:21:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-29 03:21:12,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:12,065 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:12,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:21:12,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 03:21:12,267 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:12,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:12,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1304716546, now seen corresponding path program 1 times [2023-11-29 03:21:12,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:12,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647715479] [2023-11-29 03:21:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:12,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:12,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:12,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776766351] [2023-11-29 03:21:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:12,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:12,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:12,332 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:12,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:21:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:12,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:21:12,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1994 proven. 57 refuted. 0 times theorem prover too weak. 1909 trivial. 0 not checked. [2023-11-29 03:21:12,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:12,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:12,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647715479] [2023-11-29 03:21:12,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:12,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776766351] [2023-11-29 03:21:12,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776766351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:12,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:12,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 03:21:12,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191457079] [2023-11-29 03:21:12,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:12,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 03:21:12,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:12,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 03:21:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:21:12,888 INFO L87 Difference]: Start difference. First operand 675 states and 1008 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-29 03:21:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:13,280 INFO L93 Difference]: Finished difference Result 1143 states and 1677 transitions. [2023-11-29 03:21:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:21:13,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) Word has length 302 [2023-11-29 03:21:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:13,284 INFO L225 Difference]: With dead ends: 1143 [2023-11-29 03:21:13,285 INFO L226 Difference]: Without dead ends: 598 [2023-11-29 03:21:13,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 595 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-29 03:21:13,287 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 527 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:13,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 489 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:21:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2023-11-29 03:21:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 529. [2023-11-29 03:21:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 372 states have (on average 1.3198924731182795) internal successors, (491), 372 states have internal predecessors, (491), 135 states have call successors, (135), 21 states have call predecessors, (135), 21 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-29 03:21:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 761 transitions. [2023-11-29 03:21:13,364 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 761 transitions. Word has length 302 [2023-11-29 03:21:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:13,364 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 761 transitions. [2023-11-29 03:21:13,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-29 03:21:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 761 transitions. [2023-11-29 03:21:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-29 03:21:13,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:13,366 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:13,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:21:13,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:13,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:13,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:13,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1639254556, now seen corresponding path program 1 times [2023-11-29 03:21:13,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:13,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097553585] [2023-11-29 03:21:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:13,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:13,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:13,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057848805] [2023-11-29 03:21:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:13,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:13,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:13,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:13,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:21:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:13,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 03:21:13,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 722 proven. 246 refuted. 0 times theorem prover too weak. 2992 trivial. 0 not checked. [2023-11-29 03:21:14,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 12 proven. 249 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2023-11-29 03:21:15,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:15,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097553585] [2023-11-29 03:21:15,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:15,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057848805] [2023-11-29 03:21:15,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057848805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:15,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:15,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-29 03:21:15,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294014662] [2023-11-29 03:21:15,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:15,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:21:15,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:15,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:21:15,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:21:15,081 INFO L87 Difference]: Start difference. First operand 529 states and 761 transitions. Second operand has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) [2023-11-29 03:21:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:15,771 INFO L93 Difference]: Finished difference Result 969 states and 1377 transitions. [2023-11-29 03:21:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 03:21:15,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) Word has length 303 [2023-11-29 03:21:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:15,776 INFO L225 Difference]: With dead ends: 969 [2023-11-29 03:21:15,776 INFO L226 Difference]: Without dead ends: 571 [2023-11-29 03:21:15,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:21:15,778 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1003 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:15,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 696 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 03:21:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-11-29 03:21:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 541. [2023-11-29 03:21:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 381 states have (on average 1.304461942257218) internal successors, (497), 381 states have internal predecessors, (497), 135 states have call successors, (135), 24 states have call predecessors, (135), 24 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-29 03:21:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 767 transitions. [2023-11-29 03:21:15,823 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 767 transitions. Word has length 303 [2023-11-29 03:21:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:15,824 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 767 transitions. [2023-11-29 03:21:15,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 5 states have call successors, (89), 3 states have call predecessors, (89), 7 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) [2023-11-29 03:21:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 767 transitions. [2023-11-29 03:21:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-29 03:21:15,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:15,826 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:15,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 03:21:16,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:16,027 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:16,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash 283973478, now seen corresponding path program 1 times [2023-11-29 03:21:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:16,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419337045] [2023-11-29 03:21:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:16,073 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:16,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989959469] [2023-11-29 03:21:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:16,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:16,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:16,075 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:16,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:21:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:16,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:21:16,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1518 proven. 99 refuted. 0 times theorem prover too weak. 2343 trivial. 0 not checked. [2023-11-29 03:21:17,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 33 proven. 99 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:17,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:17,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419337045] [2023-11-29 03:21:17,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:17,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989959469] [2023-11-29 03:21:17,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989959469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:17,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:17,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 03:21:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232408256] [2023-11-29 03:21:17,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:21:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:21:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:21:17,284 INFO L87 Difference]: Start difference. First operand 541 states and 767 transitions. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:21:22,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:21:26,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:21:30,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:21:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:31,171 INFO L93 Difference]: Finished difference Result 1718 states and 2456 transitions. [2023-11-29 03:21:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 03:21:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 303 [2023-11-29 03:21:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:31,178 INFO L225 Difference]: With dead ends: 1718 [2023-11-29 03:21:31,178 INFO L226 Difference]: Without dead ends: 1300 [2023-11-29 03:21:31,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2023-11-29 03:21:31,180 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 817 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 363 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:31,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 1992 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1242 Invalid, 3 Unknown, 0 Unchecked, 13.5s Time] [2023-11-29 03:21:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2023-11-29 03:21:31,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 850. [2023-11-29 03:21:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 614 states have (on average 1.3192182410423452) internal successors, (810), 615 states have internal predecessors, (810), 197 states have call successors, (197), 38 states have call predecessors, (197), 38 states have return successors, (197), 196 states have call predecessors, (197), 197 states have call successors, (197) [2023-11-29 03:21:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1204 transitions. [2023-11-29 03:21:31,337 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1204 transitions. Word has length 303 [2023-11-29 03:21:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:31,338 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1204 transitions. [2023-11-29 03:21:31,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:21:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1204 transitions. [2023-11-29 03:21:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-29 03:21:31,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:31,341 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:31,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:21:31,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:31,542 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:31,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash -329248026, now seen corresponding path program 1 times [2023-11-29 03:21:31,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:31,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855486478] [2023-11-29 03:21:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:31,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:31,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:31,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026322252] [2023-11-29 03:21:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:31,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:31,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:31,595 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:31,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:21:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:31,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 03:21:31,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:32,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:21:32,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:32,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855486478] [2023-11-29 03:21:32,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:32,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026322252] [2023-11-29 03:21:32,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026322252] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:21:32,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:21:32,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-11-29 03:21:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408497407] [2023-11-29 03:21:32,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:21:32,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:21:32,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:21:32,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:21:32,378 INFO L87 Difference]: Start difference. First operand 850 states and 1204 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:32,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:32,744 INFO L93 Difference]: Finished difference Result 2756 states and 3929 transitions. [2023-11-29 03:21:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:21:32,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 303 [2023-11-29 03:21:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:32,760 INFO L225 Difference]: With dead ends: 2756 [2023-11-29 03:21:32,760 INFO L226 Difference]: Without dead ends: 1950 [2023-11-29 03:21:32,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:21:32,763 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 312 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:32,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1060 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:21:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2023-11-29 03:21:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1610. [2023-11-29 03:21:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1160 states have (on average 1.306896551724138) internal successors, (1516), 1161 states have internal predecessors, (1516), 377 states have call successors, (377), 72 states have call predecessors, (377), 72 states have return successors, (377), 376 states have call predecessors, (377), 377 states have call successors, (377) [2023-11-29 03:21:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2270 transitions. [2023-11-29 03:21:33,023 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2270 transitions. Word has length 303 [2023-11-29 03:21:33,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:33,023 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 2270 transitions. [2023-11-29 03:21:33,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2270 transitions. [2023-11-29 03:21:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-29 03:21:33,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:33,026 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:33,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:21:33,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 03:21:33,226 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:33,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash 94398696, now seen corresponding path program 1 times [2023-11-29 03:21:33,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:33,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205647580] [2023-11-29 03:21:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:33,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:33,272 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:33,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35377220] [2023-11-29 03:21:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:33,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:33,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:33,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:33,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:21:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:33,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 03:21:33,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:21:33,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:21:33,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:33,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205647580] [2023-11-29 03:21:33,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:33,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35377220] [2023-11-29 03:21:33,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35377220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:21:33,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:21:33,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 03:21:33,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017461586] [2023-11-29 03:21:33,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:21:33,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 03:21:33,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:33,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 03:21:33,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:21:33,836 INFO L87 Difference]: Start difference. First operand 1610 states and 2270 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:35,264 INFO L93 Difference]: Finished difference Result 6842 states and 9654 transitions. [2023-11-29 03:21:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 03:21:35,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 303 [2023-11-29 03:21:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:35,295 INFO L225 Difference]: With dead ends: 6842 [2023-11-29 03:21:35,295 INFO L226 Difference]: Without dead ends: 5276 [2023-11-29 03:21:35,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:21:35,300 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 1274 mSDsluCounter, 2925 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 3694 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:35,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 3694 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 03:21:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2023-11-29 03:21:35,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 2954. [2023-11-29 03:21:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2164 states have (on average 1.3096118299445472) internal successors, (2834), 2173 states have internal predecessors, (2834), 653 states have call successors, (653), 136 states have call predecessors, (653), 136 states have return successors, (653), 644 states have call predecessors, (653), 653 states have call successors, (653) [2023-11-29 03:21:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 4140 transitions. [2023-11-29 03:21:35,734 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 4140 transitions. Word has length 303 [2023-11-29 03:21:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:35,734 INFO L495 AbstractCegarLoop]: Abstraction has 2954 states and 4140 transitions. [2023-11-29 03:21:35,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 7 states have internal predecessors, (81), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 4140 transitions. [2023-11-29 03:21:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-29 03:21:35,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:35,738 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:35,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 03:21:35,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:35,938 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:35,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash 369158310, now seen corresponding path program 1 times [2023-11-29 03:21:35,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:35,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827688783] [2023-11-29 03:21:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:35,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:35,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:35,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983563578] [2023-11-29 03:21:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:35,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:35,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:35,984 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:35,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:21:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:36,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 03:21:36,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2023-11-29 03:21:37,103 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:21:37,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:37,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827688783] [2023-11-29 03:21:37,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:37,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983563578] [2023-11-29 03:21:37,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983563578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:21:37,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:21:37,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 03:21:37,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430161071] [2023-11-29 03:21:37,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:21:37,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 03:21:37,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:37,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 03:21:37,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:21:37,106 INFO L87 Difference]: Start difference. First operand 2954 states and 4140 transitions. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:38,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:38,951 INFO L93 Difference]: Finished difference Result 7892 states and 11063 transitions. [2023-11-29 03:21:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 03:21:38,951 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 303 [2023-11-29 03:21:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:38,982 INFO L225 Difference]: With dead ends: 7892 [2023-11-29 03:21:38,982 INFO L226 Difference]: Without dead ends: 4982 [2023-11-29 03:21:38,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:21:38,990 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 881 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 2851 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:38,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 2851 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 03:21:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2023-11-29 03:21:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3042. [2023-11-29 03:21:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 2219 states have (on average 1.3059936908517351) internal successors, (2898), 2227 states have internal predecessors, (2898), 681 states have call successors, (681), 141 states have call predecessors, (681), 141 states have return successors, (681), 673 states have call predecessors, (681), 681 states have call successors, (681) [2023-11-29 03:21:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 4260 transitions. [2023-11-29 03:21:39,490 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 4260 transitions. Word has length 303 [2023-11-29 03:21:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:39,490 INFO L495 AbstractCegarLoop]: Abstraction has 3042 states and 4260 transitions. [2023-11-29 03:21:39,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 8 states have internal predecessors, (81), 1 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2023-11-29 03:21:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 4260 transitions. [2023-11-29 03:21:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-11-29 03:21:39,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:39,494 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:39,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 03:21:39,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:39,695 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:39,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:39,695 INFO L85 PathProgramCache]: Analyzing trace with hash 53927742, now seen corresponding path program 1 times [2023-11-29 03:21:39,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:39,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833155033] [2023-11-29 03:21:39,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:39,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:39,733 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:39,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432389293] [2023-11-29 03:21:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:39,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:39,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:39,735 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:39,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:21:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:39,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 03:21:40,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1934 proven. 51 refuted. 0 times theorem prover too weak. 1975 trivial. 0 not checked. [2023-11-29 03:21:40,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 81 proven. 51 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:40,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:40,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833155033] [2023-11-29 03:21:40,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:40,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432389293] [2023-11-29 03:21:40,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432389293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:40,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:40,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-29 03:21:40,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305422648] [2023-11-29 03:21:40,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:40,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:21:40,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:40,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:21:40,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:21:40,815 INFO L87 Difference]: Start difference. First operand 3042 states and 4260 transitions. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:21:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:42,231 INFO L93 Difference]: Finished difference Result 8840 states and 12344 transitions. [2023-11-29 03:21:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 03:21:42,232 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 304 [2023-11-29 03:21:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:42,264 INFO L225 Difference]: With dead ends: 8840 [2023-11-29 03:21:42,264 INFO L226 Difference]: Without dead ends: 5918 [2023-11-29 03:21:42,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 595 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:21:42,271 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 953 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:42,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 1329 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:21:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5918 states. [2023-11-29 03:21:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5918 to 2154. [2023-11-29 03:21:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 1663 states have (on average 1.317498496692724) internal successors, (2191), 1663 states have internal predecessors, (2191), 405 states have call successors, (405), 85 states have call predecessors, (405), 85 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-29 03:21:42,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 3001 transitions. [2023-11-29 03:21:42,601 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 3001 transitions. Word has length 304 [2023-11-29 03:21:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:42,601 INFO L495 AbstractCegarLoop]: Abstraction has 2154 states and 3001 transitions. [2023-11-29 03:21:42,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:21:42,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 3001 transitions. [2023-11-29 03:21:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-29 03:21:42,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:42,605 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:42,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 03:21:42,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 03:21:42,813 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:42,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:42,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1997516812, now seen corresponding path program 1 times [2023-11-29 03:21:42,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:42,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110171272] [2023-11-29 03:21:42,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:42,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:42,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:42,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972659759] [2023-11-29 03:21:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:42,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:42,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:42,860 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:42,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:21:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:43,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:21:43,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 384 proven. 126 refuted. 0 times theorem prover too weak. 3450 trivial. 0 not checked. [2023-11-29 03:21:43,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:44,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:44,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110171272] [2023-11-29 03:21:44,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:44,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972659759] [2023-11-29 03:21:44,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972659759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:44,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:44,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 03:21:44,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236879344] [2023-11-29 03:21:44,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:44,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 03:21:44,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 03:21:44,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:21:44,220 INFO L87 Difference]: Start difference. First operand 2154 states and 3001 transitions. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:21:48,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:21:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:48,807 INFO L93 Difference]: Finished difference Result 4284 states and 5930 transitions. [2023-11-29 03:21:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:21:48,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 305 [2023-11-29 03:21:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:48,818 INFO L225 Difference]: With dead ends: 4284 [2023-11-29 03:21:48,818 INFO L226 Difference]: Without dead ends: 2248 [2023-11-29 03:21:48,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:21:48,823 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 394 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:48,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 409 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 295 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 03:21:48,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2023-11-29 03:21:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2158. [2023-11-29 03:21:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 1658 states have (on average 1.2889022919179736) internal successors, (2137), 1658 states have internal predecessors, (2137), 405 states have call successors, (405), 94 states have call predecessors, (405), 94 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-29 03:21:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 2947 transitions. [2023-11-29 03:21:49,094 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 2947 transitions. Word has length 305 [2023-11-29 03:21:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:49,095 INFO L495 AbstractCegarLoop]: Abstraction has 2158 states and 2947 transitions. [2023-11-29 03:21:49,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:21:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 2947 transitions. [2023-11-29 03:21:49,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-29 03:21:49,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:49,098 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:49,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 03:21:49,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:21:49,299 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:49,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:49,300 INFO L85 PathProgramCache]: Analyzing trace with hash 900017516, now seen corresponding path program 1 times [2023-11-29 03:21:49,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:49,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711792117] [2023-11-29 03:21:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:49,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:49,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:49,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168408212] [2023-11-29 03:21:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:49,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:49,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:49,339 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:49,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:21:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:49,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 03:21:49,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1322 proven. 105 refuted. 0 times theorem prover too weak. 2533 trivial. 0 not checked. [2023-11-29 03:21:50,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 27 proven. 105 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:51,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:51,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711792117] [2023-11-29 03:21:51,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:51,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168408212] [2023-11-29 03:21:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168408212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:51,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2023-11-29 03:21:51,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665301015] [2023-11-29 03:21:51,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:51,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 03:21:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 03:21:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 03:21:51,151 INFO L87 Difference]: Start difference. First operand 2158 states and 2947 transitions. Second operand has 15 states, 15 states have (on average 10.8) internal successors, (162), 15 states have internal predecessors, (162), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:21:52,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:21:52,034 INFO L93 Difference]: Finished difference Result 4842 states and 6641 transitions. [2023-11-29 03:21:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 03:21:52,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 10.8) internal successors, (162), 15 states have internal predecessors, (162), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) Word has length 306 [2023-11-29 03:21:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:21:52,047 INFO L225 Difference]: With dead ends: 4842 [2023-11-29 03:21:52,047 INFO L226 Difference]: Without dead ends: 2820 [2023-11-29 03:21:52,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-11-29 03:21:52,052 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 760 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:21:52,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 680 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:21:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2023-11-29 03:21:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2242. [2023-11-29 03:21:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1733 states have (on average 1.276399307559146) internal successors, (2212), 1733 states have internal predecessors, (2212), 405 states have call successors, (405), 103 states have call predecessors, (405), 103 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-29 03:21:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3022 transitions. [2023-11-29 03:21:52,324 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3022 transitions. Word has length 306 [2023-11-29 03:21:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:21:52,337 INFO L495 AbstractCegarLoop]: Abstraction has 2242 states and 3022 transitions. [2023-11-29 03:21:52,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.8) internal successors, (162), 15 states have internal predecessors, (162), 4 states have call successors, (90), 3 states have call predecessors, (90), 5 states have return successors, (90), 4 states have call predecessors, (90), 4 states have call successors, (90) [2023-11-29 03:21:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3022 transitions. [2023-11-29 03:21:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-29 03:21:52,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:21:52,339 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:21:52,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 03:21:52,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:21:52,540 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:21:52,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:21:52,540 INFO L85 PathProgramCache]: Analyzing trace with hash 82369066, now seen corresponding path program 1 times [2023-11-29 03:21:52,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:21:52,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653462771] [2023-11-29 03:21:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:52,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:21:52,577 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:21:52,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612838058] [2023-11-29 03:21:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:21:52,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:21:52,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:21:52,578 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:21:52,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:21:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:21:52,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 03:21:52,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:21:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1850 proven. 210 refuted. 0 times theorem prover too weak. 1900 trivial. 0 not checked. [2023-11-29 03:21:54,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:21:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 51 proven. 81 refuted. 0 times theorem prover too weak. 3828 trivial. 0 not checked. [2023-11-29 03:21:56,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:21:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653462771] [2023-11-29 03:21:56,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:21:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612838058] [2023-11-29 03:21:56,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612838058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:21:56,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:21:56,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2023-11-29 03:21:56,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328067852] [2023-11-29 03:21:56,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:21:56,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 03:21:56,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:21:56,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 03:21:56,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:21:56,914 INFO L87 Difference]: Start difference. First operand 2242 states and 3022 transitions. Second operand has 26 states, 26 states have (on average 6.346153846153846) internal successors, (165), 26 states have internal predecessors, (165), 5 states have call successors, (90), 4 states have call predecessors, (90), 6 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) [2023-11-29 03:22:03,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:22:07,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:22:12,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:22:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:14,106 INFO L93 Difference]: Finished difference Result 9420 states and 12637 transitions. [2023-11-29 03:22:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 03:22:14,107 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.346153846153846) internal successors, (165), 26 states have internal predecessors, (165), 5 states have call successors, (90), 4 states have call predecessors, (90), 6 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) Word has length 306 [2023-11-29 03:22:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:14,120 INFO L225 Difference]: With dead ends: 9420 [2023-11-29 03:22:14,120 INFO L226 Difference]: Without dead ends: 7318 [2023-11-29 03:22:14,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1608, Invalid=5874, Unknown=0, NotChecked=0, Total=7482 [2023-11-29 03:22:14,127 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 1770 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 2077 mSolverCounterSat, 229 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1784 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2077 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:14,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1784 Valid, 1453 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2077 Invalid, 3 Unknown, 0 Unchecked, 14.2s Time] [2023-11-29 03:22:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2023-11-29 03:22:14,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 4238. [2023-11-29 03:22:14,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4238 states, 3583 states have (on average 1.3212391850404688) internal successors, (4734), 3599 states have internal predecessors, (4734), 485 states have call successors, (485), 169 states have call predecessors, (485), 169 states have return successors, (485), 469 states have call predecessors, (485), 485 states have call successors, (485) [2023-11-29 03:22:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4238 states to 4238 states and 5704 transitions. [2023-11-29 03:22:14,590 INFO L78 Accepts]: Start accepts. Automaton has 4238 states and 5704 transitions. Word has length 306 [2023-11-29 03:22:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:14,590 INFO L495 AbstractCegarLoop]: Abstraction has 4238 states and 5704 transitions. [2023-11-29 03:22:14,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.346153846153846) internal successors, (165), 26 states have internal predecessors, (165), 5 states have call successors, (90), 4 states have call predecessors, (90), 6 states have return successors, (90), 4 states have call predecessors, (90), 5 states have call successors, (90) [2023-11-29 03:22:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4238 states and 5704 transitions. [2023-11-29 03:22:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-29 03:22:14,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:14,593 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:22:14,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 03:22:14,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:22:14,793 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:14,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:14,794 INFO L85 PathProgramCache]: Analyzing trace with hash -938699288, now seen corresponding path program 1 times [2023-11-29 03:22:14,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:14,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852553424] [2023-11-29 03:22:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:14,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:14,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:22:14,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928623696] [2023-11-29 03:22:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:14,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:22:14,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:22:14,827 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:22:14,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 03:22:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:15,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 03:22:15,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:22:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2149 proven. 447 refuted. 0 times theorem prover too weak. 1364 trivial. 0 not checked. [2023-11-29 03:22:19,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:22:24,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:22:24,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852553424] [2023-11-29 03:22:24,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:22:24,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928623696] [2023-11-29 03:22:24,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928623696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:22:24,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:22:24,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-29 03:22:24,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294070629] [2023-11-29 03:22:24,286 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 03:22:24,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 03:22:24,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:22:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 03:22:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 03:22:24,289 INFO L87 Difference]: Start difference. First operand 4238 states and 5704 transitions. Second operand has 25 states, 25 states have (on average 4.32) internal successors, (108), 23 states have internal predecessors, (108), 6 states have call successors, (45), 6 states have call predecessors, (45), 9 states have return successors, (45), 5 states have call predecessors, (45), 6 states have call successors, (45) [2023-11-29 03:22:31,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:22:35,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:22:39,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:22:43,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:22:47,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:22:51,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:22:55,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:22:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:22:57,961 INFO L93 Difference]: Finished difference Result 10335 states and 13855 transitions. [2023-11-29 03:22:57,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 03:22:57,962 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.32) internal successors, (108), 23 states have internal predecessors, (108), 6 states have call successors, (45), 6 states have call predecessors, (45), 9 states have return successors, (45), 5 states have call predecessors, (45), 6 states have call successors, (45) Word has length 306 [2023-11-29 03:22:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:22:57,973 INFO L225 Difference]: With dead ends: 10335 [2023-11-29 03:22:57,973 INFO L226 Difference]: Without dead ends: 6245 [2023-11-29 03:22:57,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1156, Invalid=3400, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 03:22:57,980 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 2268 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 100 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2269 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:22:57,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2269 Valid, 1021 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1457 Invalid, 7 Unknown, 0 Unchecked, 31.0s Time] [2023-11-29 03:22:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6245 states. [2023-11-29 03:22:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6245 to 3635. [2023-11-29 03:22:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3090 states have (on average 1.2870550161812297) internal successors, (3977), 3090 states have internal predecessors, (3977), 405 states have call successors, (405), 139 states have call predecessors, (405), 139 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-29 03:22:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 4787 transitions. [2023-11-29 03:22:58,440 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 4787 transitions. Word has length 306 [2023-11-29 03:22:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:22:58,440 INFO L495 AbstractCegarLoop]: Abstraction has 3635 states and 4787 transitions. [2023-11-29 03:22:58,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.32) internal successors, (108), 23 states have internal predecessors, (108), 6 states have call successors, (45), 6 states have call predecessors, (45), 9 states have return successors, (45), 5 states have call predecessors, (45), 6 states have call successors, (45) [2023-11-29 03:22:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 4787 transitions. [2023-11-29 03:22:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-29 03:22:58,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:22:58,444 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:22:58,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 03:22:58,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:22:58,645 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:22:58,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:22:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1508537576, now seen corresponding path program 1 times [2023-11-29 03:22:58,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:22:58,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920779817] [2023-11-29 03:22:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:58,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:22:58,686 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:22:58,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251939588] [2023-11-29 03:22:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:22:58,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:22:58,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:22:58,688 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:22:58,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 03:22:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:22:59,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 03:22:59,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:23:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2038 proven. 318 refuted. 0 times theorem prover too weak. 1604 trivial. 0 not checked. [2023-11-29 03:23:00,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:23:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 60 proven. 327 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2023-11-29 03:23:01,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:01,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920779817] [2023-11-29 03:23:01,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:23:01,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251939588] [2023-11-29 03:23:01,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251939588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:23:01,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:23:01,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-29 03:23:01,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150980766] [2023-11-29 03:23:01,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:23:01,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:23:01,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:23:01,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:23:01,485 INFO L87 Difference]: Start difference. First operand 3635 states and 4787 transitions. Second operand has 24 states, 24 states have (on average 7.25) internal successors, (174), 24 states have internal predecessors, (174), 7 states have call successors, (89), 4 states have call predecessors, (89), 10 states have return successors, (90), 6 states have call predecessors, (90), 7 states have call successors, (90) [2023-11-29 03:23:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:03,686 INFO L93 Difference]: Finished difference Result 8147 states and 10660 transitions. [2023-11-29 03:23:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 03:23:03,687 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.25) internal successors, (174), 24 states have internal predecessors, (174), 7 states have call successors, (89), 4 states have call predecessors, (89), 10 states have return successors, (90), 6 states have call predecessors, (90), 7 states have call successors, (90) Word has length 306 [2023-11-29 03:23:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:03,696 INFO L225 Difference]: With dead ends: 8147 [2023-11-29 03:23:03,696 INFO L226 Difference]: Without dead ends: 4633 [2023-11-29 03:23:03,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=628, Invalid=1628, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 03:23:03,702 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 416 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:03,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 794 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 03:23:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2023-11-29 03:23:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 3703. [2023-11-29 03:23:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3149 states have (on average 1.281676722769133) internal successors, (4036), 3149 states have internal predecessors, (4036), 405 states have call successors, (405), 148 states have call predecessors, (405), 148 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-29 03:23:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 4846 transitions. [2023-11-29 03:23:04,205 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 4846 transitions. Word has length 306 [2023-11-29 03:23:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:04,206 INFO L495 AbstractCegarLoop]: Abstraction has 3703 states and 4846 transitions. [2023-11-29 03:23:04,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.25) internal successors, (174), 24 states have internal predecessors, (174), 7 states have call successors, (89), 4 states have call predecessors, (89), 10 states have return successors, (90), 6 states have call predecessors, (90), 7 states have call successors, (90) [2023-11-29 03:23:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 4846 transitions. [2023-11-29 03:23:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-29 03:23:04,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:04,208 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:04,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 03:23:04,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:04,409 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:04,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash -905420818, now seen corresponding path program 1 times [2023-11-29 03:23:04,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:04,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566439297] [2023-11-29 03:23:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:04,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:04,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:23:04,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404874429] [2023-11-29 03:23:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:04,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:04,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:23:04,452 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:23:04,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 03:23:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:04,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 03:23:04,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:23:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1976 proven. 321 refuted. 0 times theorem prover too weak. 1663 trivial. 0 not checked. [2023-11-29 03:23:06,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:23:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 57 proven. 330 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2023-11-29 03:23:07,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:07,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566439297] [2023-11-29 03:23:07,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:23:07,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404874429] [2023-11-29 03:23:07,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404874429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:23:07,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:23:07,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2023-11-29 03:23:07,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717126918] [2023-11-29 03:23:07,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:23:07,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 03:23:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 03:23:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2023-11-29 03:23:07,789 INFO L87 Difference]: Start difference. First operand 3703 states and 4846 transitions. Second operand has 28 states, 28 states have (on average 6.214285714285714) internal successors, (174), 28 states have internal predecessors, (174), 7 states have call successors, (89), 4 states have call predecessors, (89), 10 states have return successors, (90), 6 states have call predecessors, (90), 7 states have call successors, (90) [2023-11-29 03:23:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:23:10,515 INFO L93 Difference]: Finished difference Result 8059 states and 10624 transitions. [2023-11-29 03:23:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 03:23:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.214285714285714) internal successors, (174), 28 states have internal predecessors, (174), 7 states have call successors, (89), 4 states have call predecessors, (89), 10 states have return successors, (90), 6 states have call predecessors, (90), 7 states have call successors, (90) Word has length 306 [2023-11-29 03:23:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:23:10,524 INFO L225 Difference]: With dead ends: 8059 [2023-11-29 03:23:10,524 INFO L226 Difference]: Without dead ends: 4305 [2023-11-29 03:23:10,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=878, Invalid=2544, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 03:23:10,529 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 1027 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:23:10,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 1040 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 03:23:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2023-11-29 03:23:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 2842. [2023-11-29 03:23:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2288 states have (on average 1.2583041958041958) internal successors, (2879), 2288 states have internal predecessors, (2879), 405 states have call successors, (405), 148 states have call predecessors, (405), 148 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-29 03:23:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3689 transitions. [2023-11-29 03:23:11,052 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3689 transitions. Word has length 306 [2023-11-29 03:23:11,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:23:11,053 INFO L495 AbstractCegarLoop]: Abstraction has 2842 states and 3689 transitions. [2023-11-29 03:23:11,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.214285714285714) internal successors, (174), 28 states have internal predecessors, (174), 7 states have call successors, (89), 4 states have call predecessors, (89), 10 states have return successors, (90), 6 states have call predecessors, (90), 7 states have call successors, (90) [2023-11-29 03:23:11,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3689 transitions. [2023-11-29 03:23:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-29 03:23:11,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:23:11,055 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:23:11,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 03:23:11,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:11,255 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:23:11,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:23:11,256 INFO L85 PathProgramCache]: Analyzing trace with hash 783968940, now seen corresponding path program 1 times [2023-11-29 03:23:11,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:23:11,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719800045] [2023-11-29 03:23:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:11,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:23:11,287 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:23:11,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640446580] [2023-11-29 03:23:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:23:11,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:23:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:23:11,288 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:23:11,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 03:23:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:23:11,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 03:23:11,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:23:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2009 proven. 144 refuted. 0 times theorem prover too weak. 1807 trivial. 0 not checked. [2023-11-29 03:23:22,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:23:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 114 proven. 147 refuted. 0 times theorem prover too weak. 3699 trivial. 0 not checked. [2023-11-29 03:23:23,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:23:23,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719800045] [2023-11-29 03:23:23,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:23:23,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640446580] [2023-11-29 03:23:23,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640446580] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:23:23,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:23:23,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2023-11-29 03:23:23,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949918368] [2023-11-29 03:23:23,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:23:23,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:23:23,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:23:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:23:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=413, Unknown=1, NotChecked=0, Total=552 [2023-11-29 03:23:23,959 INFO L87 Difference]: Start difference. First operand 2842 states and 3689 transitions. Second operand has 24 states, 23 states have (on average 7.304347826086956) internal successors, (168), 22 states have internal predecessors, (168), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-29 03:23:29,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:23:33,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:23:37,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:23:41,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:23:45,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:23:49,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:23:53,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:23:58,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:24:02,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:24:05,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:24:07,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:24:10,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.84s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 03:24:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:24:11,598 INFO L93 Difference]: Finished difference Result 8621 states and 11227 transitions. [2023-11-29 03:24:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 03:24:11,599 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 7.304347826086956) internal successors, (168), 22 states have internal predecessors, (168), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) Word has length 306 [2023-11-29 03:24:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:24:11,608 INFO L225 Difference]: With dead ends: 8621 [2023-11-29 03:24:11,608 INFO L226 Difference]: Without dead ends: 5939 [2023-11-29 03:24:11,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=631, Invalid=1530, Unknown=1, NotChecked=0, Total=2162 [2023-11-29 03:24:11,614 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 1221 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 159 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:24:11,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 1123 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1055 Invalid, 8 Unknown, 0 Unchecked, 43.6s Time] [2023-11-29 03:24:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5939 states. [2023-11-29 03:24:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5939 to 3695. [2023-11-29 03:24:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3695 states, 3141 states have (on average 1.2747532632919452) internal successors, (4004), 3141 states have internal predecessors, (4004), 405 states have call successors, (405), 148 states have call predecessors, (405), 148 states have return successors, (405), 405 states have call predecessors, (405), 405 states have call successors, (405) [2023-11-29 03:24:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3695 states to 3695 states and 4814 transitions. [2023-11-29 03:24:12,386 INFO L78 Accepts]: Start accepts. Automaton has 3695 states and 4814 transitions. Word has length 306 [2023-11-29 03:24:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:24:12,386 INFO L495 AbstractCegarLoop]: Abstraction has 3695 states and 4814 transitions. [2023-11-29 03:24:12,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 7.304347826086956) internal successors, (168), 22 states have internal predecessors, (168), 6 states have call successors, (90), 4 states have call predecessors, (90), 7 states have return successors, (90), 6 states have call predecessors, (90), 6 states have call successors, (90) [2023-11-29 03:24:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3695 states and 4814 transitions. [2023-11-29 03:24:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2023-11-29 03:24:12,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:24:12,388 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:24:12,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 03:24:12,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 03:24:12,589 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:24:12,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:24:12,589 INFO L85 PathProgramCache]: Analyzing trace with hash -237099414, now seen corresponding path program 1 times [2023-11-29 03:24:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:24:12,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805738985] [2023-11-29 03:24:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:24:12,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:24:12,624 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:24:12,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355691619] [2023-11-29 03:24:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:24:12,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:24:12,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:24:12,625 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:24:12,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f755e-9a9c-4337-8329-fa913480b60a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process