./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/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_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/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_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/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 d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:48:09,320 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:48:09,421 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:48:09,427 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:48:09,428 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:48:09,454 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:48:09,454 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:48:09,455 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:48:09,456 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:48:09,456 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:48:09,457 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:48:09,457 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:48:09,458 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:48:09,459 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:48:09,459 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:48:09,460 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:48:09,460 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:48:09,461 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:48:09,461 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:48:09,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:48:09,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:48:09,463 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:48:09,463 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:48:09,464 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:48:09,464 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:48:09,465 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:48:09,465 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:48:09,465 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:48:09,466 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:48:09,466 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:48:09,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:48:09,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:48:09,468 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:48:09,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:48:09,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:48:09,468 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:48:09,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:48:09,469 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:48:09,469 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:48:09,469 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:48:09,469 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:48:09,470 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:48:09,470 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_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4daf1340b92ad99da0e14bd9974ded6768f4e200672f7478b349dd411e40bd7 [2023-11-29 01:48:09,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:48:09,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:48:09,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:48:09,716 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:48:09,717 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:48:09,718 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2023-11-29 01:48:12,448 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:48:12,632 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:48:12,633 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2023-11-29 01:48:12,639 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/data/304fe8c09/79fb9c0444d1407e85a2dcfc225e6f99/FLAG645c6cf40 [2023-11-29 01:48:12,650 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/data/304fe8c09/79fb9c0444d1407e85a2dcfc225e6f99 [2023-11-29 01:48:12,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:48:12,654 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:48:12,655 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:48:12,655 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:48:12,660 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:48:12,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed2033f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12, skipping insertion in model container [2023-11-29 01:48:12,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,683 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:48:12,819 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_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2023-11-29 01:48:12,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:48:12,848 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:48:12,860 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_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound100.c[490,503] [2023-11-29 01:48:12,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:48:12,883 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:48:12,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12 WrapperNode [2023-11-29 01:48:12,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:48:12,884 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:48:12,884 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:48:12,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:48:12,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,900 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,919 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 94 [2023-11-29 01:48:12,920 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:48:12,920 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:48:12,920 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:48:12,920 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:48:12,930 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,932 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,945 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 01:48:12,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,949 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,953 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,958 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:48:12,958 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:48:12,959 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:48:12,959 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:48:12,960 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (1/1) ... [2023-11-29 01:48:12,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:48:12,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:12,989 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:48:13,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:48:13,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:48:13,026 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 01:48:13,026 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 01:48:13,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:48:13,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:48:13,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:48:13,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 01:48:13,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 01:48:13,103 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:48:13,106 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:48:13,275 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:48:13,300 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:48:13,300 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 01:48:13,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:48:13 BoogieIcfgContainer [2023-11-29 01:48:13,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:48:13,304 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:48:13,304 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:48:13,307 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:48:13,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:48:12" (1/3) ... [2023-11-29 01:48:13,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764157ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:48:13, skipping insertion in model container [2023-11-29 01:48:13,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:48:12" (2/3) ... [2023-11-29 01:48:13,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764157ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:48:13, skipping insertion in model container [2023-11-29 01:48:13,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:48:13" (3/3) ... [2023-11-29 01:48:13,310 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2023-11-29 01:48:13,331 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:48:13,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:48:13,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:48:13,388 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;@2fe4b601, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:48:13,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:48:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 01:48:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 01:48:13,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:13,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:13,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:13,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:13,405 INFO L85 PathProgramCache]: Analyzing trace with hash -832436526, now seen corresponding path program 1 times [2023-11-29 01:48:13,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:13,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068903379] [2023-11-29 01:48:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:13,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:13,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068903379] [2023-11-29 01:48:13,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 01:48:13,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175275058] [2023-11-29 01:48:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:13,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:13,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:13,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:13,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:48:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:13,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 01:48:13,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:48:13,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:48:13,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175275058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:13,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:13,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:48:13,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601630672] [2023-11-29 01:48:13,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:13,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:48:13,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:48:13,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:48:13,667 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:48:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:13,692 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2023-11-29 01:48:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:48:13,694 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-11-29 01:48:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:13,702 INFO L225 Difference]: With dead ends: 62 [2023-11-29 01:48:13,702 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 01:48:13,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 01:48:13,709 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:13,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:48:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 01:48:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-29 01:48:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 01:48:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2023-11-29 01:48:13,743 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 17 [2023-11-29 01:48:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:13,744 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2023-11-29 01:48:13,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:48:13,744 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2023-11-29 01:48:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 01:48:13,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:13,745 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:13,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:48:13,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 01:48:13,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:13,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:13,947 INFO L85 PathProgramCache]: Analyzing trace with hash 958862887, now seen corresponding path program 1 times [2023-11-29 01:48:13,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:13,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170968119] [2023-11-29 01:48:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:13,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:13,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:13,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449104393] [2023-11-29 01:48:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:13,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:13,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:13,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:13,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:48:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:14,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:48:14,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:48:14,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:48:14,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:14,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170968119] [2023-11-29 01:48:14,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:14,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449104393] [2023-11-29 01:48:14,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449104393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:14,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:14,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:48:14,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278856671] [2023-11-29 01:48:14,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:14,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:48:14,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:14,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:48:14,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:48:14,082 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:14,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:14,104 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-11-29 01:48:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:48:14,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-11-29 01:48:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:14,106 INFO L225 Difference]: With dead ends: 39 [2023-11-29 01:48:14,106 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 01:48:14,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:48:14,108 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:14,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:48:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 01:48:14,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-29 01:48:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 01:48:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-11-29 01:48:14,117 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2023-11-29 01:48:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:14,118 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-11-29 01:48:14,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:14,118 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-11-29 01:48:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 01:48:14,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:14,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:14,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:48:14,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:14,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:14,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash -359656705, now seen corresponding path program 1 times [2023-11-29 01:48:14,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:14,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668332564] [2023-11-29 01:48:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:14,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:14,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:14,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309851603] [2023-11-29 01:48:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:14,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:14,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:14,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:14,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:48:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:14,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:48:14,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:48:14,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:48:14,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668332564] [2023-11-29 01:48:14,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309851603] [2023-11-29 01:48:14,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309851603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:14,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:14,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 01:48:14,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745848207] [2023-11-29 01:48:14,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:14,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:48:14,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:48:14,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:48:14,440 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:14,547 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2023-11-29 01:48:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:48:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-29 01:48:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:14,549 INFO L225 Difference]: With dead ends: 52 [2023-11-29 01:48:14,549 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 01:48:14,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:48:14,551 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:14,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 129 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:48:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 01:48:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2023-11-29 01:48:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 01:48:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-29 01:48:14,562 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2023-11-29 01:48:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:14,562 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-29 01:48:14,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-29 01:48:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 01:48:14,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:14,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:14,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:48:14,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:14,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:14,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1735129581, now seen corresponding path program 1 times [2023-11-29 01:48:14,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:14,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246336566] [2023-11-29 01:48:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:14,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:14,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:14,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449015488] [2023-11-29 01:48:14,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:14,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:14,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:14,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:14,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:48:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:14,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:48:14,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:48:14,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:48:14,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246336566] [2023-11-29 01:48:14,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449015488] [2023-11-29 01:48:14,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449015488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:14,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:14,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:48:14,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281512950] [2023-11-29 01:48:14,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:14,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:48:14,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:14,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:48:14,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:48:14,899 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:14,925 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2023-11-29 01:48:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:48:14,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-29 01:48:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:14,927 INFO L225 Difference]: With dead ends: 57 [2023-11-29 01:48:14,927 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 01:48:14,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:48:14,928 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:14,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:48:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 01:48:14,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-29 01:48:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 01:48:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-11-29 01:48:14,937 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 24 [2023-11-29 01:48:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:14,938 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-11-29 01:48:14,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-11-29 01:48:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 01:48:14,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:14,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:14,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:48:15,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:15,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:15,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:15,145 INFO L85 PathProgramCache]: Analyzing trace with hash 150917056, now seen corresponding path program 1 times [2023-11-29 01:48:15,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:15,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074686599] [2023-11-29 01:48:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:15,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:15,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:15,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026761835] [2023-11-29 01:48:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:15,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:15,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:15,158 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:15,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:48:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:15,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:48:15,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:48:15,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:48:15,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:15,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074686599] [2023-11-29 01:48:15,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:15,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026761835] [2023-11-29 01:48:15,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026761835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:15,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:15,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:48:15,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471866374] [2023-11-29 01:48:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:15,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:48:15,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:48:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:48:15,423 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:15,528 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2023-11-29 01:48:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:48:15,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-29 01:48:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:15,530 INFO L225 Difference]: With dead ends: 53 [2023-11-29 01:48:15,530 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 01:48:15,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:48:15,531 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 61 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:15,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 164 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:48:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 01:48:15,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-11-29 01:48:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 01:48:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2023-11-29 01:48:15,544 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 24 [2023-11-29 01:48:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:15,545 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2023-11-29 01:48:15,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2023-11-29 01:48:15,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 01:48:15,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:15,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:15,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 01:48:15,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:15,748 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:15,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:15,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1833090586, now seen corresponding path program 1 times [2023-11-29 01:48:15,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:15,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179726655] [2023-11-29 01:48:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:15,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:15,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:15,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433787156] [2023-11-29 01:48:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:15,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:15,764 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:15,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:48:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:15,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:48:15,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:48:15,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:48:15,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:15,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179726655] [2023-11-29 01:48:15,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:15,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433787156] [2023-11-29 01:48:15,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433787156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:15,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:48:15,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 01:48:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584863401] [2023-11-29 01:48:15,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:48:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:48:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:48:15,957 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:48:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:16,123 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2023-11-29 01:48:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:48:16,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-11-29 01:48:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:16,126 INFO L225 Difference]: With dead ends: 146 [2023-11-29 01:48:16,127 INFO L226 Difference]: Without dead ends: 139 [2023-11-29 01:48:16,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:48:16,128 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 73 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:16,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 207 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:48:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-29 01:48:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2023-11-29 01:48:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.338235294117647) internal successors, (91), 70 states have internal predecessors, (91), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-29 01:48:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2023-11-29 01:48:16,154 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 25 [2023-11-29 01:48:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:16,155 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2023-11-29 01:48:16,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:48:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2023-11-29 01:48:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 01:48:16,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:16,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:16,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:48:16,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:16,362 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:16,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1010868448, now seen corresponding path program 1 times [2023-11-29 01:48:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:16,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015765432] [2023-11-29 01:48:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:16,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:16,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602423951] [2023-11-29 01:48:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:16,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:16,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:16,374 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:16,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:48:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:16,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:48:16,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:48:16,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:48:16,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:16,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015765432] [2023-11-29 01:48:16,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:16,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602423951] [2023-11-29 01:48:16,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602423951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:16,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:48:16,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-11-29 01:48:16,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548911451] [2023-11-29 01:48:16,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:16,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:48:16,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:16,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:48:16,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:48:16,558 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:48:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:16,778 INFO L93 Difference]: Finished difference Result 182 states and 260 transitions. [2023-11-29 01:48:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:48:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-11-29 01:48:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:16,781 INFO L225 Difference]: With dead ends: 182 [2023-11-29 01:48:16,781 INFO L226 Difference]: Without dead ends: 170 [2023-11-29 01:48:16,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:48:16,783 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 114 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:16,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 320 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:48:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-29 01:48:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2023-11-29 01:48:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 96 states have (on average 1.3541666666666667) internal successors, (130), 97 states have internal predecessors, (130), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 01:48:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2023-11-29 01:48:16,810 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 26 [2023-11-29 01:48:16,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:16,811 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2023-11-29 01:48:16,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-29 01:48:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2023-11-29 01:48:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 01:48:16,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:16,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:16,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:48:17,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:17,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:17,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2130442992, now seen corresponding path program 1 times [2023-11-29 01:48:17,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:17,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401867777] [2023-11-29 01:48:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:17,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:17,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:17,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916894125] [2023-11-29 01:48:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:17,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:17,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:17,026 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:17,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:48:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:17,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:48:17,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:48:17,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:17,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:17,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401867777] [2023-11-29 01:48:17,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:17,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916894125] [2023-11-29 01:48:17,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916894125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:17,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:48:17,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-29 01:48:17,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373087240] [2023-11-29 01:48:17,353 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:48:17,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:48:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:48:17,354 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 01:48:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:17,520 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2023-11-29 01:48:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:48:17,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-11-29 01:48:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:17,523 INFO L225 Difference]: With dead ends: 142 [2023-11-29 01:48:17,523 INFO L226 Difference]: Without dead ends: 140 [2023-11-29 01:48:17,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:48:17,524 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:17,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 186 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:48:17,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-29 01:48:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2023-11-29 01:48:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 106 states have internal predecessors, (139), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-29 01:48:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2023-11-29 01:48:17,556 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 29 [2023-11-29 01:48:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:17,556 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2023-11-29 01:48:17,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 01:48:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2023-11-29 01:48:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 01:48:17,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:17,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:17,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:48:17,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:17,761 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:17,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2110713919, now seen corresponding path program 1 times [2023-11-29 01:48:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:17,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356035832] [2023-11-29 01:48:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:17,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:17,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:17,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547396472] [2023-11-29 01:48:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:17,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:17,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:17,772 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:17,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:48:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:17,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 01:48:17,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:48:18,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:48:18,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:18,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356035832] [2023-11-29 01:48:18,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:18,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547396472] [2023-11-29 01:48:18,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547396472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:18,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:48:18,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-11-29 01:48:18,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183129736] [2023-11-29 01:48:18,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:18,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:48:18,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:18,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:48:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:48:18,183 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:48:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:18,494 INFO L93 Difference]: Finished difference Result 182 states and 250 transitions. [2023-11-29 01:48:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:48:18,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2023-11-29 01:48:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:18,496 INFO L225 Difference]: With dead ends: 182 [2023-11-29 01:48:18,496 INFO L226 Difference]: Without dead ends: 180 [2023-11-29 01:48:18,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:48:18,498 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 92 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:18,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 398 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:48:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-29 01:48:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 169. [2023-11-29 01:48:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3492063492063493) internal successors, (170), 127 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 01:48:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 231 transitions. [2023-11-29 01:48:18,522 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 231 transitions. Word has length 31 [2023-11-29 01:48:18,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:18,523 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 231 transitions. [2023-11-29 01:48:18,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:48:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 231 transitions. [2023-11-29 01:48:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 01:48:18,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:18,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:18,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:48:18,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:18,730 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:18,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:18,731 INFO L85 PathProgramCache]: Analyzing trace with hash -363027956, now seen corresponding path program 1 times [2023-11-29 01:48:18,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:18,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934579872] [2023-11-29 01:48:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:18,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:18,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:18,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966771333] [2023-11-29 01:48:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:18,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:18,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:18,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:18,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:48:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:18,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:48:18,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:48:18,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:48:18,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934579872] [2023-11-29 01:48:18,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966771333] [2023-11-29 01:48:18,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966771333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:18,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:18,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:48:18,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608783706] [2023-11-29 01:48:18,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:18,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:48:18,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:48:18,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:48:18,835 INFO L87 Difference]: Start difference. First operand 169 states and 231 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:18,875 INFO L93 Difference]: Finished difference Result 236 states and 324 transitions. [2023-11-29 01:48:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:48:18,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-11-29 01:48:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:18,877 INFO L225 Difference]: With dead ends: 236 [2023-11-29 01:48:18,877 INFO L226 Difference]: Without dead ends: 169 [2023-11-29 01:48:18,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:48:18,879 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:18,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 102 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:48:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-29 01:48:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-11-29 01:48:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.3412698412698412) internal successors, (169), 127 states have internal predecessors, (169), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 01:48:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2023-11-29 01:48:18,908 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 31 [2023-11-29 01:48:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:18,909 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2023-11-29 01:48:18,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2023-11-29 01:48:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 01:48:18,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:18,910 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:18,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:48:19,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:48:19,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:19,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:19,113 INFO L85 PathProgramCache]: Analyzing trace with hash -242784896, now seen corresponding path program 1 times [2023-11-29 01:48:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:19,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781127064] [2023-11-29 01:48:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:19,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:19,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:19,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223215761] [2023-11-29 01:48:19,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:19,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:19,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:19,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:19,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:48:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:19,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:48:19,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:48:19,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:20,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:20,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781127064] [2023-11-29 01:48:20,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:20,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223215761] [2023-11-29 01:48:20,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223215761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:20,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:48:20,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-29 01:48:20,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747138763] [2023-11-29 01:48:20,647 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:20,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:48:20,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:20,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:48:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2023-11-29 01:48:20,648 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 01:48:20,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:20,846 INFO L93 Difference]: Finished difference Result 191 states and 257 transitions. [2023-11-29 01:48:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:48:20,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2023-11-29 01:48:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:20,848 INFO L225 Difference]: With dead ends: 191 [2023-11-29 01:48:20,848 INFO L226 Difference]: Without dead ends: 189 [2023-11-29 01:48:20,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2023-11-29 01:48:20,850 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:20,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 211 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:48:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-29 01:48:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2023-11-29 01:48:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 138 states have (on average 1.326086956521739) internal successors, (183), 139 states have internal predecessors, (183), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-29 01:48:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 252 transitions. [2023-11-29 01:48:20,882 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 252 transitions. Word has length 34 [2023-11-29 01:48:20,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:20,882 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 252 transitions. [2023-11-29 01:48:20,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 01:48:20,882 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 252 transitions. [2023-11-29 01:48:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 01:48:20,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:20,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:20,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:48:21,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:48:21,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:21,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:21,090 INFO L85 PathProgramCache]: Analyzing trace with hash -568879, now seen corresponding path program 1 times [2023-11-29 01:48:21,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:21,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100280269] [2023-11-29 01:48:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:21,098 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:21,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067924063] [2023-11-29 01:48:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:21,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:21,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:21,100 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:21,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:48:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:21,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 01:48:21,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:48:21,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:48:21,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:21,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100280269] [2023-11-29 01:48:21,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:21,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067924063] [2023-11-29 01:48:21,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067924063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:21,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:48:21,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 17 [2023-11-29 01:48:21,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278168250] [2023-11-29 01:48:21,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:21,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:48:21,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:21,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:48:21,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:48:21,634 INFO L87 Difference]: Start difference. First operand 188 states and 252 transitions. Second operand has 17 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 01:48:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:23,477 INFO L93 Difference]: Finished difference Result 348 states and 497 transitions. [2023-11-29 01:48:23,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:48:23,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2023-11-29 01:48:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:23,481 INFO L225 Difference]: With dead ends: 348 [2023-11-29 01:48:23,482 INFO L226 Difference]: Without dead ends: 346 [2023-11-29 01:48:23,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=664, Unknown=1, NotChecked=0, Total=812 [2023-11-29 01:48:23,483 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 359 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 114 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:23,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 360 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 366 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:48:23,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-29 01:48:23,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 330. [2023-11-29 01:48:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 247 states have (on average 1.4008097165991902) internal successors, (346), 258 states have internal predecessors, (346), 67 states have call successors, (67), 15 states have call predecessors, (67), 15 states have return successors, (66), 56 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-29 01:48:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 479 transitions. [2023-11-29 01:48:23,542 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 479 transitions. Word has length 36 [2023-11-29 01:48:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:23,543 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 479 transitions. [2023-11-29 01:48:23,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 01:48:23,543 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 479 transitions. [2023-11-29 01:48:23,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 01:48:23,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:23,544 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:23,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 01:48:23,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:48:23,748 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:23,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash 895823024, now seen corresponding path program 1 times [2023-11-29 01:48:23,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:23,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144429527] [2023-11-29 01:48:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:23,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:23,758 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:23,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451363360] [2023-11-29 01:48:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:23,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:23,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:23,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:23,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:48:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:23,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:48:23,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 01:48:26,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:48:26,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:26,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144429527] [2023-11-29 01:48:26,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:26,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451363360] [2023-11-29 01:48:26,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451363360] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:26,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:48:26,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-11-29 01:48:26,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244729097] [2023-11-29 01:48:26,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:26,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:48:26,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:26,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:48:26,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2023-11-29 01:48:26,494 INFO L87 Difference]: Start difference. First operand 330 states and 479 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:48:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:26,592 INFO L93 Difference]: Finished difference Result 336 states and 484 transitions. [2023-11-29 01:48:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:48:26,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-11-29 01:48:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:26,596 INFO L225 Difference]: With dead ends: 336 [2023-11-29 01:48:26,596 INFO L226 Difference]: Without dead ends: 334 [2023-11-29 01:48:26,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2023-11-29 01:48:26,597 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:26,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 120 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:48:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-29 01:48:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2023-11-29 01:48:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 250 states have (on average 1.388) internal successors, (347), 261 states have internal predecessors, (347), 67 states have call successors, (67), 16 states have call predecessors, (67), 16 states have return successors, (66), 56 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-29 01:48:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 480 transitions. [2023-11-29 01:48:26,668 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 480 transitions. Word has length 39 [2023-11-29 01:48:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:26,668 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 480 transitions. [2023-11-29 01:48:26,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:48:26,669 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 480 transitions. [2023-11-29 01:48:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 01:48:26,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:26,670 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:26,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:48:26,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:48:26,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:26,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:26,873 INFO L85 PathProgramCache]: Analyzing trace with hash 184539710, now seen corresponding path program 1 times [2023-11-29 01:48:26,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:26,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746677874] [2023-11-29 01:48:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:26,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:26,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:26,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579942642] [2023-11-29 01:48:26,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:26,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:26,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:26,883 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:26,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:48:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:26,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 01:48:26,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:48:26,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:48:27,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746677874] [2023-11-29 01:48:27,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579942642] [2023-11-29 01:48:27,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579942642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:27,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:48:27,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 01:48:27,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089224835] [2023-11-29 01:48:27,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:27,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:48:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:48:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:48:27,034 INFO L87 Difference]: Start difference. First operand 334 states and 480 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:48:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:27,298 INFO L93 Difference]: Finished difference Result 813 states and 1156 transitions. [2023-11-29 01:48:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:48:27,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2023-11-29 01:48:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:27,302 INFO L225 Difference]: With dead ends: 813 [2023-11-29 01:48:27,302 INFO L226 Difference]: Without dead ends: 598 [2023-11-29 01:48:27,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:48:27,304 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 112 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:27,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 273 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:48:27,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2023-11-29 01:48:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 568. [2023-11-29 01:48:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 412 states have (on average 1.3300970873786409) internal successors, (548), 426 states have internal predecessors, (548), 118 states have call successors, (118), 37 states have call predecessors, (118), 37 states have return successors, (114), 104 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-29 01:48:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 780 transitions. [2023-11-29 01:48:27,423 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 780 transitions. Word has length 37 [2023-11-29 01:48:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:27,423 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 780 transitions. [2023-11-29 01:48:27,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:48:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 780 transitions. [2023-11-29 01:48:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 01:48:27,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:27,424 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:27,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:48:27,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:48:27,625 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:27,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:27,625 INFO L85 PathProgramCache]: Analyzing trace with hash 869918208, now seen corresponding path program 1 times [2023-11-29 01:48:27,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:27,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256094400] [2023-11-29 01:48:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:27,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:27,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:27,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516802636] [2023-11-29 01:48:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:27,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:27,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:27,633 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:27,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:48:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:27,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 01:48:27,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:48:27,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:48:27,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256094400] [2023-11-29 01:48:27,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516802636] [2023-11-29 01:48:27,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516802636] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:27,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:48:27,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 01:48:27,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019037405] [2023-11-29 01:48:27,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:27,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:48:27,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:48:27,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:48:27,793 INFO L87 Difference]: Start difference. First operand 568 states and 780 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:48:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:28,189 INFO L93 Difference]: Finished difference Result 1222 states and 1714 transitions. [2023-11-29 01:48:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:48:28,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-29 01:48:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:28,194 INFO L225 Difference]: With dead ends: 1222 [2023-11-29 01:48:28,194 INFO L226 Difference]: Without dead ends: 887 [2023-11-29 01:48:28,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:48:28,195 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 216 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:28,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 258 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:48:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-11-29 01:48:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 847. [2023-11-29 01:48:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 607 states have (on average 1.299835255354201) internal successors, (789), 625 states have internal predecessors, (789), 188 states have call successors, (188), 51 states have call predecessors, (188), 51 states have return successors, (182), 170 states have call predecessors, (182), 182 states have call successors, (182) [2023-11-29 01:48:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1159 transitions. [2023-11-29 01:48:28,359 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1159 transitions. Word has length 38 [2023-11-29 01:48:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:28,359 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1159 transitions. [2023-11-29 01:48:28,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 01:48:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1159 transitions. [2023-11-29 01:48:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 01:48:28,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:28,360 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:28,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:48:28,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:48:28,561 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:28,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:28,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2022990534, now seen corresponding path program 2 times [2023-11-29 01:48:28,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:28,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906960452] [2023-11-29 01:48:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:28,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:28,570 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:28,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660834517] [2023-11-29 01:48:28,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:48:28,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:28,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:28,572 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:28,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:48:28,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:48:28,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:48:28,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:48:28,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:48:28,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:48:28,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906960452] [2023-11-29 01:48:28,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660834517] [2023-11-29 01:48:28,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660834517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:28,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:28,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:48:28,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049327117] [2023-11-29 01:48:28,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:28,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:48:28,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:28,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:48:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:48:28,659 INFO L87 Difference]: Start difference. First operand 847 states and 1159 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:29,028 INFO L93 Difference]: Finished difference Result 1294 states and 1825 transitions. [2023-11-29 01:48:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:48:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-11-29 01:48:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:29,036 INFO L225 Difference]: With dead ends: 1294 [2023-11-29 01:48:29,036 INFO L226 Difference]: Without dead ends: 990 [2023-11-29 01:48:29,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:48:29,038 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 31 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:29,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 170 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:48:29,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2023-11-29 01:48:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 812. [2023-11-29 01:48:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 592 states have (on average 1.2939189189189189) internal successors, (766), 610 states have internal predecessors, (766), 168 states have call successors, (168), 51 states have call predecessors, (168), 51 states have return successors, (162), 150 states have call predecessors, (162), 162 states have call successors, (162) [2023-11-29 01:48:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1096 transitions. [2023-11-29 01:48:29,269 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1096 transitions. Word has length 39 [2023-11-29 01:48:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:29,269 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1096 transitions. [2023-11-29 01:48:29,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 01:48:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1096 transitions. [2023-11-29 01:48:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 01:48:29,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:29,270 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:29,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:48:29,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:48:29,471 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:29,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash -263121925, now seen corresponding path program 1 times [2023-11-29 01:48:29,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:29,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286200060] [2023-11-29 01:48:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:29,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:29,480 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:29,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558032437] [2023-11-29 01:48:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:29,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:29,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:29,481 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:29,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:48:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:29,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 01:48:29,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:48:30,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 01:48:31,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286200060] [2023-11-29 01:48:31,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558032437] [2023-11-29 01:48:31,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558032437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:31,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:48:31,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-11-29 01:48:31,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948385276] [2023-11-29 01:48:31,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:31,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:48:31,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:31,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:48:31,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:48:31,193 INFO L87 Difference]: Start difference. First operand 812 states and 1096 transitions. Second operand has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-29 01:48:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:42,524 INFO L93 Difference]: Finished difference Result 1434 states and 1939 transitions. [2023-11-29 01:48:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 01:48:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 53 [2023-11-29 01:48:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:42,532 INFO L225 Difference]: With dead ends: 1434 [2023-11-29 01:48:42,532 INFO L226 Difference]: Without dead ends: 1073 [2023-11-29 01:48:42,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 01:48:42,535 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 321 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:42,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 617 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 01:48:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2023-11-29 01:48:42,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 941. [2023-11-29 01:48:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 698 states have (on average 1.2908309455587392) internal successors, (901), 711 states have internal predecessors, (901), 184 states have call successors, (184), 58 states have call predecessors, (184), 58 states have return successors, (180), 171 states have call predecessors, (180), 180 states have call successors, (180) [2023-11-29 01:48:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1265 transitions. [2023-11-29 01:48:42,962 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1265 transitions. Word has length 53 [2023-11-29 01:48:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:42,962 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1265 transitions. [2023-11-29 01:48:42,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-29 01:48:42,962 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1265 transitions. [2023-11-29 01:48:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 01:48:42,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:42,963 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:42,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:48:43,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:48:43,164 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:43,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2029616726, now seen corresponding path program 1 times [2023-11-29 01:48:43,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:43,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574728362] [2023-11-29 01:48:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:43,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:43,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:43,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655006502] [2023-11-29 01:48:43,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:43,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:43,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:43,175 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:43,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:48:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:43,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:48:43,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 01:48:43,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 01:48:43,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:43,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574728362] [2023-11-29 01:48:43,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:43,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655006502] [2023-11-29 01:48:43,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655006502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:43,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:48:43,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 01:48:43,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014543365] [2023-11-29 01:48:43,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:43,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:48:43,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:48:43,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:48:43,470 INFO L87 Difference]: Start difference. First operand 941 states and 1265 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-29 01:48:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:44,508 INFO L93 Difference]: Finished difference Result 2071 states and 2895 transitions. [2023-11-29 01:48:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 01:48:44,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 59 [2023-11-29 01:48:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:44,518 INFO L225 Difference]: With dead ends: 2071 [2023-11-29 01:48:44,519 INFO L226 Difference]: Without dead ends: 2049 [2023-11-29 01:48:44,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:48:44,520 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 278 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:44,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 333 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:48:44,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2023-11-29 01:48:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1935. [2023-11-29 01:48:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1446 states have (on average 1.3042876901798064) internal successors, (1886), 1484 states have internal predecessors, (1886), 394 states have call successors, (394), 94 states have call predecessors, (394), 94 states have return successors, (387), 356 states have call predecessors, (387), 387 states have call successors, (387) [2023-11-29 01:48:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2667 transitions. [2023-11-29 01:48:45,250 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2667 transitions. Word has length 59 [2023-11-29 01:48:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:45,250 INFO L495 AbstractCegarLoop]: Abstraction has 1935 states and 2667 transitions. [2023-11-29 01:48:45,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-29 01:48:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2667 transitions. [2023-11-29 01:48:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 01:48:45,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:45,251 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:45,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 01:48:45,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:48:45,452 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:45,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash -630218180, now seen corresponding path program 1 times [2023-11-29 01:48:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:45,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46853238] [2023-11-29 01:48:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:45,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:45,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:45,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217987022] [2023-11-29 01:48:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:45,463 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:45,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:48:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:45,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:48:45,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 01:48:45,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:48:45,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:45,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46853238] [2023-11-29 01:48:45,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:45,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217987022] [2023-11-29 01:48:45,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217987022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:48:45,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:48:45,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:48:45,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119154632] [2023-11-29 01:48:45,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:48:45,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:48:45,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:45,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:48:45,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:48:45,550 INFO L87 Difference]: Start difference. First operand 1935 states and 2667 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:48:46,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:46,493 INFO L93 Difference]: Finished difference Result 3373 states and 4721 transitions. [2023-11-29 01:48:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:48:46,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 68 [2023-11-29 01:48:46,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:46,509 INFO L225 Difference]: With dead ends: 3373 [2023-11-29 01:48:46,509 INFO L226 Difference]: Without dead ends: 2226 [2023-11-29 01:48:46,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:48:46,514 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:46,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:48:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2023-11-29 01:48:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2154. [2023-11-29 01:48:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 1570 states have (on average 1.3044585987261146) internal successors, (2048), 1608 states have internal predecessors, (2048), 489 states have call successors, (489), 94 states have call predecessors, (489), 94 states have return successors, (482), 451 states have call predecessors, (482), 482 states have call successors, (482) [2023-11-29 01:48:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 3019 transitions. [2023-11-29 01:48:47,383 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 3019 transitions. Word has length 68 [2023-11-29 01:48:47,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:47,384 INFO L495 AbstractCegarLoop]: Abstraction has 2154 states and 3019 transitions. [2023-11-29 01:48:47,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-29 01:48:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 3019 transitions. [2023-11-29 01:48:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 01:48:47,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:47,385 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:47,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:48:47,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:47,586 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:47,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1338199949, now seen corresponding path program 2 times [2023-11-29 01:48:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:47,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079684796] [2023-11-29 01:48:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:47,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:47,594 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:48:47,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621947157] [2023-11-29 01:48:47,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:48:47,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:47,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:47,595 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:47,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:48:47,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:48:47,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:48:47,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 01:48:47,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 01:48:48,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-29 01:48:50,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079684796] [2023-11-29 01:48:50,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:48:50,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621947157] [2023-11-29 01:48:50,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621947157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:50,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:48:50,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-11-29 01:48:50,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582253295] [2023-11-29 01:48:50,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:50,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 01:48:50,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 01:48:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:48:50,215 INFO L87 Difference]: Start difference. First operand 2154 states and 3019 transitions. Second operand has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 27 states have internal predecessors, (80), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-29 01:48:56,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:49:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:09,666 INFO L93 Difference]: Finished difference Result 2989 states and 4142 transitions. [2023-11-29 01:49:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 01:49:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 27 states have internal predecessors, (80), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 70 [2023-11-29 01:49:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:09,687 INFO L225 Difference]: With dead ends: 2989 [2023-11-29 01:49:09,688 INFO L226 Difference]: Without dead ends: 2983 [2023-11-29 01:49:09,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=912, Invalid=3378, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 01:49:09,690 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 525 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:09,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 713 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-11-29 01:49:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2023-11-29 01:49:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2664. [2023-11-29 01:49:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2005 states have (on average 1.3067331670822944) internal successors, (2620), 2047 states have internal predecessors, (2620), 538 states have call successors, (538), 121 states have call predecessors, (538), 120 states have return successors, (532), 495 states have call predecessors, (532), 532 states have call successors, (532) [2023-11-29 01:49:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3690 transitions. [2023-11-29 01:49:10,849 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3690 transitions. Word has length 70 [2023-11-29 01:49:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:10,849 INFO L495 AbstractCegarLoop]: Abstraction has 2664 states and 3690 transitions. [2023-11-29 01:49:10,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 27 states have internal predecessors, (80), 7 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-29 01:49:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3690 transitions. [2023-11-29 01:49:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-29 01:49:10,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:10,851 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:10,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:49:11,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:11,052 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:11,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2033330143, now seen corresponding path program 1 times [2023-11-29 01:49:11,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:11,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688452129] [2023-11-29 01:49:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:11,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:11,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:11,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626312510] [2023-11-29 01:49:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:11,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:11,063 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:11,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:49:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:11,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 01:49:11,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-29 01:49:12,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-29 01:49:23,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:23,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688452129] [2023-11-29 01:49:23,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:23,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626312510] [2023-11-29 01:49:23,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626312510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:23,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:49:23,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-11-29 01:49:23,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631692581] [2023-11-29 01:49:23,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:23,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 01:49:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:23,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 01:49:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:49:23,317 INFO L87 Difference]: Start difference. First operand 2664 states and 3690 transitions. Second operand has 33 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-29 01:49:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:57,072 INFO L93 Difference]: Finished difference Result 4132 states and 5791 transitions. [2023-11-29 01:49:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 01:49:57,073 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 83 [2023-11-29 01:49:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:57,095 INFO L225 Difference]: With dead ends: 4132 [2023-11-29 01:49:57,095 INFO L226 Difference]: Without dead ends: 4101 [2023-11-29 01:49:57,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2289 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=1764, Invalid=6792, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 01:49:57,101 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 602 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:57,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1550 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2023-11-29 01:49:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2023-11-29 01:49:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3582. [2023-11-29 01:49:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 2782 states have (on average 1.3281811646297628) internal successors, (3695), 2832 states have internal predecessors, (3695), 660 states have call successors, (660), 140 states have call predecessors, (660), 139 states have return successors, (654), 609 states have call predecessors, (654), 654 states have call successors, (654) [2023-11-29 01:49:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 5009 transitions. [2023-11-29 01:49:59,253 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 5009 transitions. Word has length 83 [2023-11-29 01:49:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:59,254 INFO L495 AbstractCegarLoop]: Abstraction has 3582 states and 5009 transitions. [2023-11-29 01:49:59,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 9 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-29 01:49:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 5009 transitions. [2023-11-29 01:49:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 01:49:59,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:59,256 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:49:59,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:49:59,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 01:49:59,457 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:59,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:59,457 INFO L85 PathProgramCache]: Analyzing trace with hash 607563547, now seen corresponding path program 1 times [2023-11-29 01:49:59,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:59,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895657195] [2023-11-29 01:49:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:59,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:59,466 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:59,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283803581] [2023-11-29 01:49:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:59,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:59,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:59,467 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:59,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:49:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:59,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 01:49:59,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-29 01:49:59,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-11-29 01:49:59,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895657195] [2023-11-29 01:49:59,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283803581] [2023-11-29 01:49:59,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283803581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:59,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:49:59,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-11-29 01:49:59,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483959388] [2023-11-29 01:49:59,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 01:49:59,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:59,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 01:49:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:49:59,850 INFO L87 Difference]: Start difference. First operand 3582 states and 5009 transitions. Second operand has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 24 states have internal predecessors, (92), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-29 01:50:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:04,886 INFO L93 Difference]: Finished difference Result 7652 states and 11156 transitions. [2023-11-29 01:50:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 01:50:04,887 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 24 states have internal predecessors, (92), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 93 [2023-11-29 01:50:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:04,916 INFO L225 Difference]: With dead ends: 7652 [2023-11-29 01:50:04,916 INFO L226 Difference]: Without dead ends: 5958 [2023-11-29 01:50:04,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:50:04,921 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 455 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:04,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 411 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:50:04,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5958 states. [2023-11-29 01:50:09,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5958 to 5719. [2023-11-29 01:50:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5719 states, 4072 states have (on average 1.3170432220039292) internal successors, (5363), 4131 states have internal predecessors, (5363), 1408 states have call successors, (1408), 239 states have call predecessors, (1408), 238 states have return successors, (1396), 1348 states have call predecessors, (1396), 1396 states have call successors, (1396) [2023-11-29 01:50:09,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 8167 transitions. [2023-11-29 01:50:09,259 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 8167 transitions. Word has length 93 [2023-11-29 01:50:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:09,259 INFO L495 AbstractCegarLoop]: Abstraction has 5719 states and 8167 transitions. [2023-11-29 01:50:09,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 24 states have internal predecessors, (92), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-29 01:50:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 8167 transitions. [2023-11-29 01:50:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 01:50:09,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:09,261 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:50:09,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 01:50:09,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 01:50:09,461 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:09,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:09,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2030329448, now seen corresponding path program 2 times [2023-11-29 01:50:09,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:09,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671642599] [2023-11-29 01:50:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:09,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:09,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:50:09,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697198643] [2023-11-29 01:50:09,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:50:09,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:09,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:09,470 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:09,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:50:09,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:50:09,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:50:09,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:50:09,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-11-29 01:50:09,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-11-29 01:50:09,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:09,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671642599] [2023-11-29 01:50:09,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:50:09,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697198643] [2023-11-29 01:50:09,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697198643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:09,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:50:09,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-11-29 01:50:09,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248999477] [2023-11-29 01:50:09,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:09,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 01:50:09,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:09,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 01:50:09,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:50:09,722 INFO L87 Difference]: Start difference. First operand 5719 states and 8167 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-29 01:50:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:16,348 INFO L93 Difference]: Finished difference Result 8659 states and 12685 transitions. [2023-11-29 01:50:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 01:50:16,348 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 94 [2023-11-29 01:50:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:16,379 INFO L225 Difference]: With dead ends: 8659 [2023-11-29 01:50:16,379 INFO L226 Difference]: Without dead ends: 7853 [2023-11-29 01:50:16,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 179 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:50:16,384 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 175 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:16,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 547 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:50:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7853 states. [2023-11-29 01:50:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7853 to 6023. [2023-11-29 01:50:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6023 states, 4321 states have (on average 1.3212219393658875) internal successors, (5709), 4387 states have internal predecessors, (5709), 1463 states have call successors, (1463), 239 states have call predecessors, (1463), 238 states have return successors, (1451), 1396 states have call predecessors, (1451), 1451 states have call successors, (1451) [2023-11-29 01:50:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 8623 transitions. [2023-11-29 01:50:20,978 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 8623 transitions. Word has length 94 [2023-11-29 01:50:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:20,978 INFO L495 AbstractCegarLoop]: Abstraction has 6023 states and 8623 transitions. [2023-11-29 01:50:20,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-29 01:50:20,978 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 8623 transitions. [2023-11-29 01:50:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 01:50:20,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:20,980 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:50:20,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 01:50:21,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:21,181 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:21,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:21,181 INFO L85 PathProgramCache]: Analyzing trace with hash 405051577, now seen corresponding path program 2 times [2023-11-29 01:50:21,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:21,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601383920] [2023-11-29 01:50:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:21,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:21,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:50:21,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172719650] [2023-11-29 01:50:21,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:50:21,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:21,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:21,190 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:21,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:50:21,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:50:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:50:21,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 01:50:21,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-11-29 01:50:22,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-11-29 01:50:30,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:30,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601383920] [2023-11-29 01:50:30,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:50:30,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172719650] [2023-11-29 01:50:30,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172719650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:30,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:50:30,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-11-29 01:50:30,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927852728] [2023-11-29 01:50:30,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:30,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 01:50:30,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:30,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 01:50:30,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:50:30,069 INFO L87 Difference]: Start difference. First operand 6023 states and 8623 transitions. Second operand has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2023-11-29 01:50:59,414 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 01:51:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:51:55,731 INFO L93 Difference]: Finished difference Result 9545 states and 13667 transitions. [2023-11-29 01:51:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 01:51:55,732 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 103 [2023-11-29 01:51:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:51:55,748 INFO L225 Difference]: With dead ends: 9545 [2023-11-29 01:51:55,748 INFO L226 Difference]: Without dead ends: 7148 [2023-11-29 01:51:55,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=1727, Invalid=8173, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 01:51:55,757 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 415 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 323 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:51:55,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1112 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 953 Invalid, 1 Unknown, 0 Unchecked, 18.0s Time] [2023-11-29 01:51:55,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7148 states. [2023-11-29 01:52:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7148 to 6340. [2023-11-29 01:52:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 4512 states have (on average 1.3207003546099292) internal successors, (5959), 4578 states have internal predecessors, (5959), 1566 states have call successors, (1566), 261 states have call predecessors, (1566), 261 states have return successors, (1555), 1500 states have call predecessors, (1555), 1555 states have call successors, (1555) [2023-11-29 01:52:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 9080 transitions. [2023-11-29 01:52:00,851 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 9080 transitions. Word has length 103 [2023-11-29 01:52:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:52:00,851 INFO L495 AbstractCegarLoop]: Abstraction has 6340 states and 9080 transitions. [2023-11-29 01:52:00,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 9 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2023-11-29 01:52:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 9080 transitions. [2023-11-29 01:52:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 01:52:00,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:52:00,854 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:52:00,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:52:01,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:52:01,054 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:52:01,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:52:01,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1545119728, now seen corresponding path program 1 times [2023-11-29 01:52:01,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:52:01,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229366238] [2023-11-29 01:52:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:01,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:52:01,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:52:01,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096612207] [2023-11-29 01:52:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:01,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:01,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:52:01,064 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:52:01,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:52:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:52:01,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 01:52:01,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:52:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 116 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 01:52:01,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:52:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 67 proven. 52 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-11-29 01:52:01,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:52:01,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229366238] [2023-11-29 01:52:01,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:52:01,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096612207] [2023-11-29 01:52:01,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096612207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:52:01,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:52:01,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-29 01:52:01,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296859671] [2023-11-29 01:52:01,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:52:01,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:52:01,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:52:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:52:01,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:52:01,492 INFO L87 Difference]: Start difference. First operand 6340 states and 9080 transitions. Second operand has 26 states, 26 states have (on average 4.038461538461538) internal successors, (105), 26 states have internal predecessors, (105), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-29 01:52:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:52:07,804 INFO L93 Difference]: Finished difference Result 11057 states and 15901 transitions. [2023-11-29 01:52:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 01:52:07,805 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.038461538461538) internal successors, (105), 26 states have internal predecessors, (105), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 105 [2023-11-29 01:52:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:52:07,819 INFO L225 Difference]: With dead ends: 11057 [2023-11-29 01:52:07,819 INFO L226 Difference]: Without dead ends: 6904 [2023-11-29 01:52:07,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 01:52:07,827 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 527 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:52:07,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 465 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:52:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2023-11-29 01:52:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 6752. [2023-11-29 01:52:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6752 states, 4727 states have (on average 1.257457160990057) internal successors, (5944), 4777 states have internal predecessors, (5944), 1727 states have call successors, (1727), 297 states have call predecessors, (1727), 297 states have return successors, (1714), 1677 states have call predecessors, (1714), 1714 states have call successors, (1714) [2023-11-29 01:52:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6752 states to 6752 states and 9385 transitions. [2023-11-29 01:52:13,650 INFO L78 Accepts]: Start accepts. Automaton has 6752 states and 9385 transitions. Word has length 105 [2023-11-29 01:52:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:52:13,651 INFO L495 AbstractCegarLoop]: Abstraction has 6752 states and 9385 transitions. [2023-11-29 01:52:13,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.038461538461538) internal successors, (105), 26 states have internal predecessors, (105), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-29 01:52:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 6752 states and 9385 transitions. [2023-11-29 01:52:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 01:52:13,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:52:13,654 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:52:13,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 01:52:13,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:52:13,855 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:52:13,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:52:13,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1665108998, now seen corresponding path program 1 times [2023-11-29 01:52:13,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:52:13,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608489156] [2023-11-29 01:52:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:13,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:52:13,865 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:52:13,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185530369] [2023-11-29 01:52:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:13,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:13,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:52:13,867 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:52:13,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:52:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:52:13,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 01:52:13,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:52:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 47 proven. 36 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2023-11-29 01:52:14,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:52:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 63 proven. 17 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-11-29 01:52:15,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:52:15,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608489156] [2023-11-29 01:52:15,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:52:15,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185530369] [2023-11-29 01:52:15,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185530369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:52:15,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:52:15,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-11-29 01:52:15,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62582395] [2023-11-29 01:52:15,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:52:15,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 01:52:15,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:52:15,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 01:52:15,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:52:15,021 INFO L87 Difference]: Start difference. First operand 6752 states and 9385 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 19 states have internal predecessors, (66), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2023-11-29 01:52:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:52:27,814 INFO L93 Difference]: Finished difference Result 14720 states and 21098 transitions. [2023-11-29 01:52:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 01:52:27,815 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 19 states have internal predecessors, (66), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 118 [2023-11-29 01:52:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:52:27,843 INFO L225 Difference]: With dead ends: 14720 [2023-11-29 01:52:27,843 INFO L226 Difference]: Without dead ends: 10743 [2023-11-29 01:52:27,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 01:52:27,852 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 231 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:52:27,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 488 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:52:27,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10743 states. [2023-11-29 01:52:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10743 to 10207. [2023-11-29 01:52:38,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 6549 states have (on average 1.2676744541151321) internal successors, (8302), 6610 states have internal predecessors, (8302), 3287 states have call successors, (3287), 371 states have call predecessors, (3287), 370 states have return successors, (3275), 3225 states have call predecessors, (3275), 3275 states have call successors, (3275) [2023-11-29 01:52:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 14864 transitions. [2023-11-29 01:52:38,937 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 14864 transitions. Word has length 118 [2023-11-29 01:52:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:52:38,937 INFO L495 AbstractCegarLoop]: Abstraction has 10207 states and 14864 transitions. [2023-11-29 01:52:38,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 19 states have internal predecessors, (66), 9 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2023-11-29 01:52:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 14864 transitions. [2023-11-29 01:52:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 01:52:38,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:52:38,939 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:52:38,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 01:52:39,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:39,140 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:52:39,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:52:39,140 INFO L85 PathProgramCache]: Analyzing trace with hash -465572137, now seen corresponding path program 2 times [2023-11-29 01:52:39,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:52:39,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051461686] [2023-11-29 01:52:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:52:39,148 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:52:39,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439913020] [2023-11-29 01:52:39,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:52:39,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:39,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:52:39,150 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:52:39,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:52:39,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:52:39,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:52:39,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 01:52:39,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:52:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 29 proven. 74 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-11-29 01:52:41,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:52:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 26 proven. 74 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2023-11-29 01:52:44,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:52:44,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051461686] [2023-11-29 01:52:44,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:52:44,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439913020] [2023-11-29 01:52:44,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439913020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:52:44,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:52:44,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2023-11-29 01:52:44,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26227983] [2023-11-29 01:52:44,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:52:44,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 01:52:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:52:44,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 01:52:44,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:52:44,875 INFO L87 Difference]: Start difference. First operand 10207 states and 14864 transitions. Second operand has 33 states, 33 states have (on average 2.878787878787879) internal successors, (95), 30 states have internal predecessors, (95), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2023-11-29 01:52:56,947 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 01:53:00,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:53:44,334 WARN L539 Checker$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 01:53:58,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:54:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:54:33,556 INFO L93 Difference]: Finished difference Result 13622 states and 19898 transitions. [2023-11-29 01:54:33,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-29 01:54:33,557 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.878787878787879) internal successors, (95), 30 states have internal predecessors, (95), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 120 [2023-11-29 01:54:33,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:54:33,590 INFO L225 Difference]: With dead ends: 13622 [2023-11-29 01:54:33,590 INFO L226 Difference]: Without dead ends: 13616 [2023-11-29 01:54:33,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4256 ImplicationChecksByTransitivity, 56.4s TimeCoverageRelationStatistics Valid=2442, Invalid=9548, Unknown=0, NotChecked=0, Total=11990 [2023-11-29 01:54:33,597 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 592 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 376 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:54:33,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1692 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 1466 Invalid, 3 Unknown, 0 Unchecked, 38.7s Time] [2023-11-29 01:54:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13616 states. [2023-11-29 01:54:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13616 to 12221. [2023-11-29 01:54:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12221 states, 7942 states have (on average 1.2670611936539915) internal successors, (10063), 8024 states have internal predecessors, (10063), 3826 states have call successors, (3826), 453 states have call predecessors, (3826), 452 states have return successors, (3816), 3743 states have call predecessors, (3816), 3816 states have call successors, (3816) [2023-11-29 01:54:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12221 states to 12221 states and 17705 transitions. [2023-11-29 01:54:47,486 INFO L78 Accepts]: Start accepts. Automaton has 12221 states and 17705 transitions. Word has length 120 [2023-11-29 01:54:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:54:47,486 INFO L495 AbstractCegarLoop]: Abstraction has 12221 states and 17705 transitions. [2023-11-29 01:54:47,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.878787878787879) internal successors, (95), 30 states have internal predecessors, (95), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2023-11-29 01:54:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 12221 states and 17705 transitions. [2023-11-29 01:54:47,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 01:54:47,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:54:47,490 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:47,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 01:54:47,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 01:54:47,691 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:54:47,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:47,691 INFO L85 PathProgramCache]: Analyzing trace with hash -222400974, now seen corresponding path program 2 times [2023-11-29 01:54:47,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:47,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519273899] [2023-11-29 01:54:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:47,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:47,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:54:47,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026925529] [2023-11-29 01:54:47,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:54:47,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:47,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:54:47,701 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:54:47,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:54:47,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:54:47,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:54:47,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 01:54:47,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:54:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 01:54:48,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:54:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2023-11-29 01:54:48,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:48,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519273899] [2023-11-29 01:54:48,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:54:48,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026925529] [2023-11-29 01:54:48,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026925529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:54:48,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:54:48,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-11-29 01:54:48,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960262681] [2023-11-29 01:54:48,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:54:48,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 01:54:48,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:48,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 01:54:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 01:54:48,388 INFO L87 Difference]: Start difference. First operand 12221 states and 17705 transitions. Second operand has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 states have internal predecessors, (127), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2023-11-29 01:55:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:19,749 INFO L93 Difference]: Finished difference Result 26603 states and 40294 transitions. [2023-11-29 01:55:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 01:55:19,750 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 states have internal predecessors, (127), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 127 [2023-11-29 01:55:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:19,807 INFO L225 Difference]: With dead ends: 26603 [2023-11-29 01:55:19,807 INFO L226 Difference]: Without dead ends: 26561 [2023-11-29 01:55:19,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 01:55:19,815 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 799 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:19,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 564 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:55:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26561 states. [2023-11-29 01:55:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26561 to 25558. [2023-11-29 01:55:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25558 states, 17184 states have (on average 1.3268738361266295) internal successors, (22801), 17524 states have internal predecessors, (22801), 7696 states have call successors, (7696), 678 states have call predecessors, (7696), 677 states have return successors, (7678), 7355 states have call predecessors, (7678), 7678 states have call successors, (7678) [2023-11-29 01:55:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25558 states to 25558 states and 38175 transitions. [2023-11-29 01:55:49,148 INFO L78 Accepts]: Start accepts. Automaton has 25558 states and 38175 transitions. Word has length 127 [2023-11-29 01:55:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:49,148 INFO L495 AbstractCegarLoop]: Abstraction has 25558 states and 38175 transitions. [2023-11-29 01:55:49,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.735294117647059) internal successors, (127), 34 states have internal predecessors, (127), 9 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2023-11-29 01:55:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 25558 states and 38175 transitions. [2023-11-29 01:55:49,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 01:55:49,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:49,152 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:49,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 01:55:49,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 01:55:49,353 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:49,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash 554616671, now seen corresponding path program 3 times [2023-11-29 01:55:49,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:49,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437712458] [2023-11-29 01:55:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:49,364 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:49,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692538375] [2023-11-29 01:55:49,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:55:49,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:49,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:49,366 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:49,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 01:55:49,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 01:55:49,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:55:49,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 01:55:49,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 87 proven. 57 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2023-11-29 01:55:52,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:55:54,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:54,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437712458] [2023-11-29 01:55:54,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:54,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692538375] [2023-11-29 01:55:54,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692538375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:55:54,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:55:54,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-29 01:55:54,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144973000] [2023-11-29 01:55:54,929 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:55:54,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:55:54,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:54,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:55:54,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:55:54,931 INFO L87 Difference]: Start difference. First operand 25558 states and 38175 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-29 01:56:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:30,980 INFO L93 Difference]: Finished difference Result 28543 states and 42597 transitions. [2023-11-29 01:56:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:56:30,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 133 [2023-11-29 01:56:30,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:31,042 INFO L225 Difference]: With dead ends: 28543 [2023-11-29 01:56:31,042 INFO L226 Difference]: Without dead ends: 28453 [2023-11-29 01:56:31,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 01:56:31,050 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 122 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:31,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 869 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 01:56:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28453 states. [2023-11-29 01:57:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28453 to 27913. [2023-11-29 01:57:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27913 states, 18586 states have (on average 1.326374690627354) internal successors, (24652), 18962 states have internal predecessors, (24652), 8551 states have call successors, (8551), 776 states have call predecessors, (8551), 775 states have return successors, (8533), 8174 states have call predecessors, (8533), 8533 states have call successors, (8533) [2023-11-29 01:57:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27913 states to 27913 states and 41736 transitions. [2023-11-29 01:57:04,290 INFO L78 Accepts]: Start accepts. Automaton has 27913 states and 41736 transitions. Word has length 133 [2023-11-29 01:57:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:04,291 INFO L495 AbstractCegarLoop]: Abstraction has 27913 states and 41736 transitions. [2023-11-29 01:57:04,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-29 01:57:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 27913 states and 41736 transitions. [2023-11-29 01:57:04,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 01:57:04,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:04,294 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:57:04,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 01:57:04,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 01:57:04,495 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:04,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:04,495 INFO L85 PathProgramCache]: Analyzing trace with hash 640147735, now seen corresponding path program 4 times [2023-11-29 01:57:04,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:04,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864616948] [2023-11-29 01:57:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:04,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:04,504 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:04,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140447459] [2023-11-29 01:57:04,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:57:04,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:04,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:04,506 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:04,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 01:57:04,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:57:04,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:04,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 01:57:04,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 70 proven. 81 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-11-29 01:57:06,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 70 proven. 78 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-11-29 01:57:29,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:29,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864616948] [2023-11-29 01:57:29,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:29,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140447459] [2023-11-29 01:57:29,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140447459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:29,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:57:29,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2023-11-29 01:57:29,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108384934] [2023-11-29 01:57:29,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:29,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 01:57:29,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:29,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 01:57:29,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 01:57:29,822 INFO L87 Difference]: Start difference. First operand 27913 states and 41736 transitions. Second operand has 38 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2023-11-29 01:57:32,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-29 01:57:34,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:57:41,553 WARN L293 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:57:59,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:58:11,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:58:17,667 WARN L293 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:58:23,724 WARN L539 Checker$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 01:58:25,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:58:33,014 WARN L293 SmtUtils]: Spent 6.97s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:59:19,744 WARN L293 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 119 DAG size of output: 117 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:59:49,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:59:54,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:00:09,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:00:14,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:00:19,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:00:23,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:00:24,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 02:00:37,692 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 02:01:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:01:06,864 INFO L93 Difference]: Finished difference Result 33389 states and 49467 transitions. [2023-11-29 02:01:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 02:01:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 133 [2023-11-29 02:01:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:01:06,935 INFO L225 Difference]: With dead ends: 33389 [2023-11-29 02:01:06,935 INFO L226 Difference]: Without dead ends: 33298 [2023-11-29 02:01:06,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3176 ImplicationChecksByTransitivity, 114.4s TimeCoverageRelationStatistics Valid=2289, Invalid=9052, Unknown=1, NotChecked=0, Total=11342 [2023-11-29 02:01:06,945 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 599 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 501 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:01:06,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 1981 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 1901 Invalid, 4 Unknown, 0 Unchecked, 57.2s Time] [2023-11-29 02:01:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33298 states. [2023-11-29 02:01:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33298 to 31761. [2023-11-29 02:01:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31761 states, 21572 states have (on average 1.3340904876692008) internal successors, (28779), 21996 states have internal predecessors, (28779), 9357 states have call successors, (9357), 832 states have call predecessors, (9357), 831 states have return successors, (9339), 8932 states have call predecessors, (9339), 9339 states have call successors, (9339) [2023-11-29 02:01:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31761 states to 31761 states and 47475 transitions. [2023-11-29 02:01:58,972 INFO L78 Accepts]: Start accepts. Automaton has 31761 states and 47475 transitions. Word has length 133 [2023-11-29 02:01:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:01:58,973 INFO L495 AbstractCegarLoop]: Abstraction has 31761 states and 47475 transitions. [2023-11-29 02:01:58,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2023-11-29 02:01:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand 31761 states and 47475 transitions. [2023-11-29 02:01:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-29 02:01:58,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:01:58,976 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:58,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 02:01:59,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:59,176 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:01:59,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash 941712309, now seen corresponding path program 5 times [2023-11-29 02:01:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:59,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994621806] [2023-11-29 02:01:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:59,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:59,186 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:01:59,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818149122] [2023-11-29 02:01:59,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:01:59,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:59,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:59,187 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:59,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce4349cd-62b5-426b-b70b-b9ab5dcfa26a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 02:01:59,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 02:01:59,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:01:59,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 02:01:59,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 44 proven. 190 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2023-11-29 02:02:01,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:02:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 50 proven. 184 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2023-11-29 02:02:17,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:02:17,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994621806] [2023-11-29 02:02:17,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:02:17,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818149122] [2023-11-29 02:02:17,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818149122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:02:17,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:02:17,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2023-11-29 02:02:17,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053087404] [2023-11-29 02:02:17,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:02:17,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 02:02:17,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:02:17,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 02:02:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1382, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:02:17,036 INFO L87 Difference]: Start difference. First operand 31761 states and 47475 transitions. Second operand has 41 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 36 states have internal predecessors, (101), 14 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 12 states have call successors, (34) [2023-11-29 02:02:25,200 WARN L293 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 02:02:34,352 WARN L293 SmtUtils]: Spent 7.07s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)