./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.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_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/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_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/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_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/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 436f0a1b9da8affd8e76edc25dee0cffff5a08ff489ec96067821d6a4548518b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:46:03,958 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:46:04,021 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:46:04,026 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:46:04,027 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:46:04,053 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:46:04,054 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:46:04,055 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:46:04,055 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:46:04,056 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:46:04,056 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:46:04,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:46:04,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:46:04,058 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:46:04,059 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:46:04,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:46:04,060 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:46:04,060 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:46:04,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:46:04,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:46:04,062 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:46:04,062 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:46:04,063 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:46:04,063 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:46:04,064 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:46:04,064 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:46:04,064 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:46:04,065 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:46:04,065 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:46:04,066 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:46:04,066 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:46:04,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:46:04,067 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:46:04,067 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:46:04,067 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:46:04,067 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:46:04,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:46:04,068 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:46:04,068 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:46:04,068 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:46:04,068 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:46:04,069 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:46:04,069 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_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 436f0a1b9da8affd8e76edc25dee0cffff5a08ff489ec96067821d6a4548518b [2023-11-29 03:46:04,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:46:04,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:46:04,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:46:04,304 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:46:04,304 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:46:04,306 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2023-11-29 03:46:06,987 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:46:07,185 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:46:07,186 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2023-11-29 03:46:07,192 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/data/4ec3d7c69/fa769c863e7a454da8b6b7108f38ea92/FLAG246d7119b [2023-11-29 03:46:07,203 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/data/4ec3d7c69/fa769c863e7a454da8b6b7108f38ea92 [2023-11-29 03:46:07,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:46:07,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:46:07,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:46:07,208 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:46:07,212 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:46:07,213 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@491c08a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07, skipping insertion in model container [2023-11-29 03:46:07,213 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,235 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:46:07,355 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_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2023-11-29 03:46:07,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:46:07,385 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:46:07,397 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_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2023-11-29 03:46:07,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:46:07,421 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:46:07,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07 WrapperNode [2023-11-29 03:46:07,422 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:46:07,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:46:07,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:46:07,423 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:46:07,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,436 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,456 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 94 [2023-11-29 03:46:07,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:46:07,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:46:07,457 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:46:07,457 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:46:07,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,469 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,480 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 03:46:07,480 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,484 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,490 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,491 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,493 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:46:07,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:46:07,494 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:46:07,494 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:46:07,494 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (1/1) ... [2023-11-29 03:46:07,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:46:07,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:07,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:46:07,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 03:46:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 03:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:46:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:46:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 03:46:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 03:46:07,614 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:46:07,616 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:46:07,757 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:46:07,776 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:46:07,776 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 03:46:07,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:46:07 BoogieIcfgContainer [2023-11-29 03:46:07,776 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:46:07,779 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:46:07,779 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:46:07,782 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:46:07,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:46:07" (1/3) ... [2023-11-29 03:46:07,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4504f78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:46:07, skipping insertion in model container [2023-11-29 03:46:07,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:46:07" (2/3) ... [2023-11-29 03:46:07,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4504f78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:46:07, skipping insertion in model container [2023-11-29 03:46:07,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:46:07" (3/3) ... [2023-11-29 03:46:07,786 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2023-11-29 03:46:07,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:46:07,806 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:46:07,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:46:07,864 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;@756be77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:46:07,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 03:46:07,869 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 03:46:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 03:46:07,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:07,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:46:07,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:07,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:07,883 INFO L85 PathProgramCache]: Analyzing trace with hash -832436526, now seen corresponding path program 1 times [2023-11-29 03:46:07,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:07,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257279045] [2023-11-29 03:46:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:07,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:08,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:08,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257279045] [2023-11-29 03:46:08,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 03:46:08,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291946951] [2023-11-29 03:46:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:08,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:08,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:08,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:08,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:46:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:08,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 03:46:08,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:08,151 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 03:46:08,151 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:46:08,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291946951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:08,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:08,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:46:08,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709675681] [2023-11-29 03:46:08,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:08,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 03:46:08,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 03:46:08,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 03:46:08,188 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 03:46:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:08,213 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2023-11-29 03:46:08,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 03:46:08,216 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 03:46:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:08,223 INFO L225 Difference]: With dead ends: 62 [2023-11-29 03:46:08,223 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 03:46:08,226 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 03:46:08,229 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 03:46:08,230 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 03:46:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 03:46:08,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-29 03:46:08,264 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 03:46:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2023-11-29 03:46:08,267 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 17 [2023-11-29 03:46:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:08,268 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2023-11-29 03:46:08,268 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 03:46:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2023-11-29 03:46:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 03:46:08,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:08,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:46:08,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:46:08,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 03:46:08,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:08,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:08,473 INFO L85 PathProgramCache]: Analyzing trace with hash 958862887, now seen corresponding path program 1 times [2023-11-29 03:46:08,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:08,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834826517] [2023-11-29 03:46:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:08,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:08,494 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:08,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657733861] [2023-11-29 03:46:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:08,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:08,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:08,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:08,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:46:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:08,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 03:46:08,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:08,616 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 03:46:08,616 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:46:08,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:08,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834826517] [2023-11-29 03:46:08,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:08,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657733861] [2023-11-29 03:46:08,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657733861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:08,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:08,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:46:08,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654284260] [2023-11-29 03:46:08,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:08,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:46:08,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:46:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:46:08,619 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 03:46:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:08,641 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-11-29 03:46:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:46:08,642 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 03:46:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:08,643 INFO L225 Difference]: With dead ends: 39 [2023-11-29 03:46:08,643 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 03:46:08,643 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 03:46:08,645 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 03:46:08,646 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 03:46:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 03:46:08,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-29 03:46:08,652 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 03:46:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-11-29 03:46:08,654 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2023-11-29 03:46:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:08,655 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-11-29 03:46:08,655 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 03:46:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-11-29 03:46:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 03:46:08,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:08,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:46:08,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:46:08,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 03:46:08,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:08,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash -359656705, now seen corresponding path program 1 times [2023-11-29 03:46:08,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:08,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865855937] [2023-11-29 03:46:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:08,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:08,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:08,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484576030] [2023-11-29 03:46:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:08,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:08,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:08,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:08,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:46:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:08,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 03:46:08,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:08,980 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 03:46:08,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:46:08,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:08,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865855937] [2023-11-29 03:46:08,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:08,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484576030] [2023-11-29 03:46:08,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484576030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:08,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:08,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 03:46:08,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642209065] [2023-11-29 03:46:08,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:08,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:46:08,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:08,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:46:08,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:46:08,984 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 03:46:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:09,066 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2023-11-29 03:46:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:46:09,067 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 03:46:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:09,068 INFO L225 Difference]: With dead ends: 52 [2023-11-29 03:46:09,068 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 03:46:09,068 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 03:46:09,070 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:46:09,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 129 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 03:46:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 03:46:09,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2023-11-29 03:46:09,078 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 03:46:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-29 03:46:09,080 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2023-11-29 03:46:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:09,080 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-29 03:46:09,080 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 03:46:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-29 03:46:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 03:46:09,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:09,081 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 03:46:09,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:46:09,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:09,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:09,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:09,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1735129581, now seen corresponding path program 1 times [2023-11-29 03:46:09,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:09,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420184615] [2023-11-29 03:46:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:09,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:09,301 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:09,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093364686] [2023-11-29 03:46:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:09,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:09,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:09,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:09,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:46:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:09,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:46:09,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:09,411 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 03:46:09,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:46:09,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:09,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420184615] [2023-11-29 03:46:09,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:09,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093364686] [2023-11-29 03:46:09,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093364686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:09,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:09,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:46:09,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91050349] [2023-11-29 03:46:09,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:09,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:46:09,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:46:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:46:09,414 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 03:46:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:09,440 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2023-11-29 03:46:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:46:09,441 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 03:46:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:09,442 INFO L225 Difference]: With dead ends: 57 [2023-11-29 03:46:09,442 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 03:46:09,443 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 03:46:09,444 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 03:46:09,444 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 03:46:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 03:46:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-29 03:46:09,451 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 03:46:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-11-29 03:46:09,453 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 24 [2023-11-29 03:46:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:09,454 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-11-29 03:46:09,454 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 03:46:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-11-29 03:46:09,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 03:46:09,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:09,455 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 03:46:09,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:46:09,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:09,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:09,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash 150917056, now seen corresponding path program 1 times [2023-11-29 03:46:09,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:09,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125821567] [2023-11-29 03:46:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:09,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:09,679 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:09,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367944890] [2023-11-29 03:46:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:09,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:09,681 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:09,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:46:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:09,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 03:46:09,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:09,960 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 03:46:09,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:46:09,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:09,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125821567] [2023-11-29 03:46:09,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:09,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367944890] [2023-11-29 03:46:09,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367944890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:09,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:09,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 03:46:09,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825979779] [2023-11-29 03:46:09,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:09,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 03:46:09,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 03:46:09,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:46:09,965 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 03:46:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:10,069 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2023-11-29 03:46:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:46:10,070 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 03:46:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:10,072 INFO L225 Difference]: With dead ends: 53 [2023-11-29 03:46:10,072 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 03:46:10,072 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 03:46:10,073 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 03:46:10,074 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 03:46:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 03:46:10,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-11-29 03:46:10,086 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 03:46:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2023-11-29 03:46:10,088 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 24 [2023-11-29 03:46:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:10,089 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2023-11-29 03:46:10,089 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 03:46:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2023-11-29 03:46:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 03:46:10,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:10,091 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 03:46:10,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:46:10,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:10,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:10,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1833090586, now seen corresponding path program 1 times [2023-11-29 03:46:10,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:10,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510807075] [2023-11-29 03:46:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:10,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:10,308 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:10,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745003739] [2023-11-29 03:46:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:10,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:10,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:10,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:10,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:46:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:10,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 03:46:10,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:10,424 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 03:46:10,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:10,499 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 03:46:10,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:10,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510807075] [2023-11-29 03:46:10,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:10,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745003739] [2023-11-29 03:46:10,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745003739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:10,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:46:10,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 03:46:10,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211179153] [2023-11-29 03:46:10,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:10,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 03:46:10,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:10,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 03:46:10,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:46:10,501 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 03:46:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:10,672 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2023-11-29 03:46:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 03:46:10,673 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 03:46:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:10,675 INFO L225 Difference]: With dead ends: 146 [2023-11-29 03:46:10,676 INFO L226 Difference]: Without dead ends: 139 [2023-11-29 03:46:10,676 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 03:46:10,677 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 03:46:10,677 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 03:46:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-29 03:46:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2023-11-29 03:46:10,701 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 03:46:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2023-11-29 03:46:10,703 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 25 [2023-11-29 03:46:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:10,703 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2023-11-29 03:46:10,704 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 03:46:10,704 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2023-11-29 03:46:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 03:46:10,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:10,705 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 03:46:10,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:46:10,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 03:46:10,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:10,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:10,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1010868448, now seen corresponding path program 1 times [2023-11-29 03:46:10,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:10,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16496836] [2023-11-29 03:46:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:10,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:10,921 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:10,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757000781] [2023-11-29 03:46:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:10,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:10,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:10,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:10,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:46:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:10,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 03:46:10,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:11,032 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 03:46:11,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:11,127 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 03:46:11,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:11,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16496836] [2023-11-29 03:46:11,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:11,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757000781] [2023-11-29 03:46:11,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757000781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:11,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:46:11,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-11-29 03:46:11,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342464586] [2023-11-29 03:46:11,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:11,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 03:46:11,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:11,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 03:46:11,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:46:11,129 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 03:46:11,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:11,350 INFO L93 Difference]: Finished difference Result 182 states and 260 transitions. [2023-11-29 03:46:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:46:11,351 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 03:46:11,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:11,353 INFO L225 Difference]: With dead ends: 182 [2023-11-29 03:46:11,353 INFO L226 Difference]: Without dead ends: 170 [2023-11-29 03:46:11,354 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 03:46:11,355 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 03:46:11,355 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 03:46:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-29 03:46:11,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2023-11-29 03:46:11,382 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 03:46:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2023-11-29 03:46:11,384 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 26 [2023-11-29 03:46:11,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:11,385 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2023-11-29 03:46:11,385 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 03:46:11,385 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2023-11-29 03:46:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 03:46:11,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:11,386 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 03:46:11,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:46:11,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 03:46:11,591 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:11,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:11,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2130442992, now seen corresponding path program 1 times [2023-11-29 03:46:11,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:11,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770225629] [2023-11-29 03:46:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:11,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:11,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:11,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069740438] [2023-11-29 03:46:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:11,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:11,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:11,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:11,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:46:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:11,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 03:46:11,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:11,844 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 03:46:11,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:11,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:11,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770225629] [2023-11-29 03:46:11,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:11,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069740438] [2023-11-29 03:46:11,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069740438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:11,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:46:11,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-29 03:46:11,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182881460] [2023-11-29 03:46:11,946 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:11,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 03:46:11,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:11,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 03:46:11,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:46:11,948 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 03:46:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:12,119 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2023-11-29 03:46:12,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:46:12,120 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 03:46:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:12,122 INFO L225 Difference]: With dead ends: 142 [2023-11-29 03:46:12,122 INFO L226 Difference]: Without dead ends: 140 [2023-11-29 03:46:12,123 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 03:46:12,123 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 03:46:12,124 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 03:46:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-29 03:46:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2023-11-29 03:46:12,152 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 03:46:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2023-11-29 03:46:12,154 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 29 [2023-11-29 03:46:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:12,154 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2023-11-29 03:46:12,154 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 03:46:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2023-11-29 03:46:12,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 03:46:12,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:12,156 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 03:46:12,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:46:12,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:12,359 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:12,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2110713919, now seen corresponding path program 1 times [2023-11-29 03:46:12,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:12,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811692626] [2023-11-29 03:46:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:12,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:12,369 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:12,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102946553] [2023-11-29 03:46:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:12,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:12,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:12,371 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:12,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:46:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:12,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 03:46:12,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:12,667 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 03:46:12,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:12,779 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 03:46:12,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:12,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811692626] [2023-11-29 03:46:12,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:12,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102946553] [2023-11-29 03:46:12,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102946553] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:12,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:46:12,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-11-29 03:46:12,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393647976] [2023-11-29 03:46:12,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:12,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:46:12,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:12,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:46:12,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:46:12,782 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 03:46:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:13,096 INFO L93 Difference]: Finished difference Result 182 states and 250 transitions. [2023-11-29 03:46:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:46:13,097 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 03:46:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:13,099 INFO L225 Difference]: With dead ends: 182 [2023-11-29 03:46:13,099 INFO L226 Difference]: Without dead ends: 180 [2023-11-29 03:46:13,100 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 03:46:13,101 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 03:46:13,101 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 03:46:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-29 03:46:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 169. [2023-11-29 03:46:13,124 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 03:46:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 231 transitions. [2023-11-29 03:46:13,125 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 231 transitions. Word has length 31 [2023-11-29 03:46:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:13,126 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 231 transitions. [2023-11-29 03:46:13,126 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 03:46:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 231 transitions. [2023-11-29 03:46:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 03:46:13,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:13,128 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 03:46:13,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:46:13,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 03:46:13,334 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:13,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash -363027956, now seen corresponding path program 1 times [2023-11-29 03:46:13,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:13,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215807051] [2023-11-29 03:46:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:13,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:13,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:13,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444632314] [2023-11-29 03:46:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:13,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:13,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:13,346 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:13,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:46:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:13,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 03:46:13,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:13,434 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 03:46:13,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:46:13,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:13,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215807051] [2023-11-29 03:46:13,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:13,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444632314] [2023-11-29 03:46:13,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444632314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:13,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:13,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:46:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179670022] [2023-11-29 03:46:13,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:13,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:46:13,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:13,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:46:13,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:46:13,437 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 03:46:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:13,469 INFO L93 Difference]: Finished difference Result 236 states and 324 transitions. [2023-11-29 03:46:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:46:13,469 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 03:46:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:13,471 INFO L225 Difference]: With dead ends: 236 [2023-11-29 03:46:13,471 INFO L226 Difference]: Without dead ends: 169 [2023-11-29 03:46:13,472 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 03:46:13,473 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 03:46:13,474 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 03:46:13,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-29 03:46:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-11-29 03:46:13,492 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 03:46:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2023-11-29 03:46:13,494 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 31 [2023-11-29 03:46:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:13,494 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2023-11-29 03:46:13,495 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 03:46:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2023-11-29 03:46:13,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 03:46:13,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:13,496 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 03:46:13,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 03:46:13,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 03:46:13,700 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:13,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:13,701 INFO L85 PathProgramCache]: Analyzing trace with hash -242784896, now seen corresponding path program 1 times [2023-11-29 03:46:13,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:13,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211677699] [2023-11-29 03:46:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:13,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:13,710 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:13,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538525236] [2023-11-29 03:46:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:13,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:13,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:13,711 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:13,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:46:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:13,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 03:46:13,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:13,985 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 03:46:13,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:18,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211677699] [2023-11-29 03:46:18,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538525236] [2023-11-29 03:46:18,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538525236] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:18,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:46:18,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-29 03:46:18,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059797881] [2023-11-29 03:46:18,119 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:18,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:46:18,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:46:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2023-11-29 03:46:18,120 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 03:46:18,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:18,353 INFO L93 Difference]: Finished difference Result 191 states and 257 transitions. [2023-11-29 03:46:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 03:46:18,353 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 03:46:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:18,355 INFO L225 Difference]: With dead ends: 191 [2023-11-29 03:46:18,355 INFO L226 Difference]: Without dead ends: 189 [2023-11-29 03:46:18,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2023-11-29 03:46:18,357 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:46:18,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 211 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:46:18,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-29 03:46:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2023-11-29 03:46:18,404 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 03:46:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 252 transitions. [2023-11-29 03:46:18,406 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 252 transitions. Word has length 34 [2023-11-29 03:46:18,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:18,407 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 252 transitions. [2023-11-29 03:46:18,407 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 03:46:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 252 transitions. [2023-11-29 03:46:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 03:46:18,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:18,409 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 03:46:18,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:46:18,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 03:46:18,610 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:18,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:18,611 INFO L85 PathProgramCache]: Analyzing trace with hash -568879, now seen corresponding path program 1 times [2023-11-29 03:46:18,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:18,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185917740] [2023-11-29 03:46:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:18,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:18,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:18,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110147414] [2023-11-29 03:46:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:18,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:18,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:18,619 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:18,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:46:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:18,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 03:46:18,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:19,019 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 03:46:19,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:19,233 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 03:46:19,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185917740] [2023-11-29 03:46:19,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:19,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110147414] [2023-11-29 03:46:19,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110147414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:19,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:46:19,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 17 [2023-11-29 03:46:19,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680136409] [2023-11-29 03:46:19,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:19,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 03:46:19,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:19,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 03:46:19,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-29 03:46:19,236 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 03:46:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:20,788 INFO L93 Difference]: Finished difference Result 348 states and 497 transitions. [2023-11-29 03:46:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 03:46:20,788 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 03:46:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:20,792 INFO L225 Difference]: With dead ends: 348 [2023-11-29 03:46:20,792 INFO L226 Difference]: Without dead ends: 346 [2023-11-29 03:46:20,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2023-11-29 03:46:20,794 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 359 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:46:20,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 360 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 03:46:20,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-29 03:46:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 330. [2023-11-29 03:46:20,849 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 03:46:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 479 transitions. [2023-11-29 03:46:20,851 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 479 transitions. Word has length 36 [2023-11-29 03:46:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:20,852 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 479 transitions. [2023-11-29 03:46:20,852 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 03:46:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 479 transitions. [2023-11-29 03:46:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 03:46:20,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:20,853 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 03:46:20,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 03:46:21,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:21,056 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:21,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash 895823024, now seen corresponding path program 1 times [2023-11-29 03:46:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:21,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688547588] [2023-11-29 03:46:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:21,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:21,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:21,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536877761] [2023-11-29 03:46:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:21,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:21,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:21,067 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:21,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:46:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:21,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 03:46:21,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:21,178 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 03:46:21,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:21,292 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 03:46:21,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688547588] [2023-11-29 03:46:21,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536877761] [2023-11-29 03:46:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536877761] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:46:21,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:46:21,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-11-29 03:46:21,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739946722] [2023-11-29 03:46:21,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:21,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:46:21,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:21,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:46:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:46:21,294 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 03:46:21,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:21,386 INFO L93 Difference]: Finished difference Result 336 states and 484 transitions. [2023-11-29 03:46:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:46:21,387 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 03:46:21,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:21,390 INFO L225 Difference]: With dead ends: 336 [2023-11-29 03:46:21,390 INFO L226 Difference]: Without dead ends: 334 [2023-11-29 03:46:21,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-29 03:46:21,391 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 03:46:21,392 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 03:46:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-29 03:46:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2023-11-29 03:46:21,456 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 03:46:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 480 transitions. [2023-11-29 03:46:21,459 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 480 transitions. Word has length 39 [2023-11-29 03:46:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:21,459 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 480 transitions. [2023-11-29 03:46:21,459 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 03:46:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 480 transitions. [2023-11-29 03:46:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 03:46:21,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:21,461 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 03:46:21,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 03:46:21,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 03:46:21,661 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:21,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash 184539710, now seen corresponding path program 1 times [2023-11-29 03:46:21,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:21,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91143347] [2023-11-29 03:46:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:21,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:21,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:21,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479125499] [2023-11-29 03:46:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:21,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:21,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:21,672 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:21,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:46:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:21,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 03:46:21,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:21,769 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 03:46:21,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:21,831 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 03:46:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91143347] [2023-11-29 03:46:21,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479125499] [2023-11-29 03:46:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479125499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:21,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:46:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 03:46:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441171749] [2023-11-29 03:46:21,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:46:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:21,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:46:21,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:46:21,834 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 03:46:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:22,084 INFO L93 Difference]: Finished difference Result 813 states and 1156 transitions. [2023-11-29 03:46:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 03:46:22,085 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 03:46:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:22,089 INFO L225 Difference]: With dead ends: 813 [2023-11-29 03:46:22,089 INFO L226 Difference]: Without dead ends: 598 [2023-11-29 03:46:22,090 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 03:46:22,091 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 130 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:46:22,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 254 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 03:46:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2023-11-29 03:46:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 568. [2023-11-29 03:46:22,180 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 03:46:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 780 transitions. [2023-11-29 03:46:22,183 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 780 transitions. Word has length 37 [2023-11-29 03:46:22,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:22,183 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 780 transitions. [2023-11-29 03:46:22,183 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 03:46:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 780 transitions. [2023-11-29 03:46:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 03:46:22,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:22,184 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 03:46:22,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:46:22,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 03:46:22,385 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:22,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash 869918208, now seen corresponding path program 1 times [2023-11-29 03:46:22,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:22,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807414981] [2023-11-29 03:46:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:22,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:22,393 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:22,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670879117] [2023-11-29 03:46:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:22,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:22,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:22,394 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:22,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:46:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:22,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 03:46:22,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:22,485 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 03:46:22,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:22,565 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 03:46:22,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:22,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807414981] [2023-11-29 03:46:22,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:22,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670879117] [2023-11-29 03:46:22,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670879117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:22,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:46:22,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 03:46:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829287704] [2023-11-29 03:46:22,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:22,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:46:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:46:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:46:22,568 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 03:46:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:22,990 INFO L93 Difference]: Finished difference Result 1222 states and 1714 transitions. [2023-11-29 03:46:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 03:46:22,991 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 03:46:22,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:22,995 INFO L225 Difference]: With dead ends: 1222 [2023-11-29 03:46:22,995 INFO L226 Difference]: Without dead ends: 887 [2023-11-29 03:46:22,996 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 03:46:22,997 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 173 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:46:22,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 301 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:46:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-11-29 03:46:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 847. [2023-11-29 03:46:23,135 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 03:46:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1159 transitions. [2023-11-29 03:46:23,139 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1159 transitions. Word has length 38 [2023-11-29 03:46:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:23,140 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1159 transitions. [2023-11-29 03:46:23,140 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 03:46:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1159 transitions. [2023-11-29 03:46:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 03:46:23,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:23,141 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 03:46:23,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 03:46:23,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:23,342 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:23,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2022990534, now seen corresponding path program 2 times [2023-11-29 03:46:23,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:23,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544380089] [2023-11-29 03:46:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:23,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:23,367 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:23,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836169066] [2023-11-29 03:46:23,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:46:23,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:23,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:23,369 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:23,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:46:23,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:46:23,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:46:23,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:46:23,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:23,449 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 03:46:23,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:46:23,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:23,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544380089] [2023-11-29 03:46:23,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:23,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836169066] [2023-11-29 03:46:23,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836169066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:23,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:23,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:46:23,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880897541] [2023-11-29 03:46:23,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:23,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:46:23,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:23,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:46:23,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:46:23,451 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 03:46:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:23,764 INFO L93 Difference]: Finished difference Result 1294 states and 1825 transitions. [2023-11-29 03:46:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:46:23,765 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 03:46:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:23,771 INFO L225 Difference]: With dead ends: 1294 [2023-11-29 03:46:23,771 INFO L226 Difference]: Without dead ends: 990 [2023-11-29 03:46:23,772 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 03:46:23,773 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 03:46:23,773 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 03:46:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2023-11-29 03:46:23,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 812. [2023-11-29 03:46:23,957 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 03:46:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1096 transitions. [2023-11-29 03:46:23,980 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1096 transitions. Word has length 39 [2023-11-29 03:46:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:23,981 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1096 transitions. [2023-11-29 03:46:23,981 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 03:46:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1096 transitions. [2023-11-29 03:46:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 03:46:23,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:23,982 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 03:46:23,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 03:46:24,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:46:24,183 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:24,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:24,183 INFO L85 PathProgramCache]: Analyzing trace with hash -263121925, now seen corresponding path program 1 times [2023-11-29 03:46:24,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:24,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806530284] [2023-11-29 03:46:24,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:24,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:24,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:24,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113223211] [2023-11-29 03:46:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:24,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:24,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:24,194 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:24,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:46:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:24,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 03:46:24,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:25,032 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 03:46:25,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:25,874 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 03:46:25,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:25,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806530284] [2023-11-29 03:46:25,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:25,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113223211] [2023-11-29 03:46:25,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113223211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:25,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:46:25,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-11-29 03:46:25,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358176764] [2023-11-29 03:46:25,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:25,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 03:46:25,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:25,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 03:46:25,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:46:25,877 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 03:46:30,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:46:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:36,360 INFO L93 Difference]: Finished difference Result 1434 states and 1939 transitions. [2023-11-29 03:46:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 03:46:36,361 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 03:46:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:36,366 INFO L225 Difference]: With dead ends: 1434 [2023-11-29 03:46:36,366 INFO L226 Difference]: Without dead ends: 1073 [2023-11-29 03:46:36,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 03:46:36,368 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 269 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:46:36,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 618 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 03:46:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2023-11-29 03:46:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 941. [2023-11-29 03:46:36,775 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 03:46:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1265 transitions. [2023-11-29 03:46:36,781 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1265 transitions. Word has length 53 [2023-11-29 03:46:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:36,781 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1265 transitions. [2023-11-29 03:46:36,781 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 03:46:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1265 transitions. [2023-11-29 03:46:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 03:46:36,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:36,782 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 03:46:36,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 03:46:36,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:46:36,983 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:36,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2029616726, now seen corresponding path program 1 times [2023-11-29 03:46:36,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:36,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451579258] [2023-11-29 03:46:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:36,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:36,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:36,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291431030] [2023-11-29 03:46:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:36,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:36,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:36,992 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:36,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:46:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:37,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 03:46:37,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:37,137 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 03:46:37,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:37,288 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 03:46:37,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:37,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451579258] [2023-11-29 03:46:37,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:37,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291431030] [2023-11-29 03:46:37,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291431030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:37,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:46:37,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 03:46:37,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816166261] [2023-11-29 03:46:37,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:37,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:46:37,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:46:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:46:37,290 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 03:46:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:38,318 INFO L93 Difference]: Finished difference Result 2071 states and 2895 transitions. [2023-11-29 03:46:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 03:46:38,318 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 03:46:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:38,327 INFO L225 Difference]: With dead ends: 2071 [2023-11-29 03:46:38,328 INFO L226 Difference]: Without dead ends: 2049 [2023-11-29 03:46:38,328 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 03:46:38,329 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 302 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:46:38,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 302 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:46:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2023-11-29 03:46:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1935. [2023-11-29 03:46:39,079 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 03:46:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2667 transitions. [2023-11-29 03:46:39,091 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2667 transitions. Word has length 59 [2023-11-29 03:46:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:39,091 INFO L495 AbstractCegarLoop]: Abstraction has 1935 states and 2667 transitions. [2023-11-29 03:46:39,092 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 03:46:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2667 transitions. [2023-11-29 03:46:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 03:46:39,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:39,093 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 03:46:39,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 03:46:39,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 03:46:39,294 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:39,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:39,294 INFO L85 PathProgramCache]: Analyzing trace with hash -630218180, now seen corresponding path program 1 times [2023-11-29 03:46:39,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:39,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490084493] [2023-11-29 03:46:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:39,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:39,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:39,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397537506] [2023-11-29 03:46:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:39,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:39,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:39,305 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:39,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 03:46:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:46:39,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 03:46:39,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:39,417 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 03:46:39,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:46:39,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:39,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490084493] [2023-11-29 03:46:39,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:39,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397537506] [2023-11-29 03:46:39,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397537506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:46:39,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:46:39,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:46:39,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800735220] [2023-11-29 03:46:39,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:46:39,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:46:39,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:39,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:46:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:46:39,420 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 03:46:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:46:40,450 INFO L93 Difference]: Finished difference Result 3373 states and 4721 transitions. [2023-11-29 03:46:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:46:40,451 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 03:46:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:46:40,464 INFO L225 Difference]: With dead ends: 3373 [2023-11-29 03:46:40,465 INFO L226 Difference]: Without dead ends: 2226 [2023-11-29 03:46:40,468 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 03:46:40,469 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 03:46:40,469 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 03:46:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2023-11-29 03:46:41,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2154. [2023-11-29 03:46:41,279 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 03:46:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 3019 transitions. [2023-11-29 03:46:41,288 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 3019 transitions. Word has length 68 [2023-11-29 03:46:41,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:46:41,288 INFO L495 AbstractCegarLoop]: Abstraction has 2154 states and 3019 transitions. [2023-11-29 03:46:41,288 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 03:46:41,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 3019 transitions. [2023-11-29 03:46:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 03:46:41,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:46:41,289 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 03:46:41,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 03:46:41,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:41,490 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:46:41,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:46:41,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1338199949, now seen corresponding path program 2 times [2023-11-29 03:46:41,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:46:41,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627368621] [2023-11-29 03:46:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:46:41,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:46:41,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:46:41,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086087107] [2023-11-29 03:46:41,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:46:41,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:46:41,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:46:41,500 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:46:41,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 03:46:41,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:46:41,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:46:41,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 03:46:41,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:46:42,579 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 03:46:42,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:46:44,353 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 03:46:44,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:46:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627368621] [2023-11-29 03:46:44,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:46:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086087107] [2023-11-29 03:46:44,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086087107] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:46:44,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:46:44,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-11-29 03:46:44,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256025027] [2023-11-29 03:46:44,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:46:44,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 03:46:44,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:46:44,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 03:46:44,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2023-11-29 03:46:44,356 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 03:46:50,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:47:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:07,896 INFO L93 Difference]: Finished difference Result 2989 states and 4142 transitions. [2023-11-29 03:47:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 03:47:07,897 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 03:47:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:07,909 INFO L225 Difference]: With dead ends: 2989 [2023-11-29 03:47:07,909 INFO L226 Difference]: Without dead ends: 2983 [2023-11-29 03:47:07,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=912, Invalid=3378, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 03:47:07,912 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 438 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:07,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 813 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-11-29 03:47:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2023-11-29 03:47:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2664. [2023-11-29 03:47:08,976 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 03:47:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3690 transitions. [2023-11-29 03:47:08,983 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3690 transitions. Word has length 70 [2023-11-29 03:47:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:47:08,984 INFO L495 AbstractCegarLoop]: Abstraction has 2664 states and 3690 transitions. [2023-11-29 03:47:08,984 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 03:47:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3690 transitions. [2023-11-29 03:47:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-29 03:47:08,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:47:08,986 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 03:47:08,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 03:47:09,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:09,186 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:47:09,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:47:09,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2033330143, now seen corresponding path program 1 times [2023-11-29 03:47:09,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:47:09,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678862179] [2023-11-29 03:47:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:09,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:47:09,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:47:09,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829108377] [2023-11-29 03:47:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:47:09,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:47:09,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:47:09,195 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:47:09,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 03:47:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:47:09,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 03:47:09,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:47:10,405 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 03:47:10,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:47:21,349 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 03:47:21,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:47:21,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678862179] [2023-11-29 03:47:21,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:47:21,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829108377] [2023-11-29 03:47:21,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829108377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:47:21,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:47:21,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-11-29 03:47:21,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187692920] [2023-11-29 03:47:21,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:47:21,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 03:47:21,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:47:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 03:47:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 03:47:21,352 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 03:47:50,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:47:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:47:59,091 INFO L93 Difference]: Finished difference Result 4132 states and 5791 transitions. [2023-11-29 03:47:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 03:47:59,092 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 03:47:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:47:59,109 INFO L225 Difference]: With dead ends: 4132 [2023-11-29 03:47:59,109 INFO L226 Difference]: Without dead ends: 4101 [2023-11-29 03:47:59,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2289 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=1764, Invalid=6792, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 03:47:59,113 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 517 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2023-11-29 03:47:59,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1649 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2023-11-29 03:47:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2023-11-29 03:48:01,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3582. [2023-11-29 03:48:01,463 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 03:48:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 5009 transitions. [2023-11-29 03:48:01,474 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 5009 transitions. Word has length 83 [2023-11-29 03:48:01,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:48:01,475 INFO L495 AbstractCegarLoop]: Abstraction has 3582 states and 5009 transitions. [2023-11-29 03:48:01,475 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 03:48:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 5009 transitions. [2023-11-29 03:48:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 03:48:01,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:48:01,478 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 03:48:01,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 03:48:01,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:01,678 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:48:01,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:48:01,679 INFO L85 PathProgramCache]: Analyzing trace with hash 607563547, now seen corresponding path program 1 times [2023-11-29 03:48:01,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:48:01,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361099185] [2023-11-29 03:48:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:01,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:48:01,687 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:48:01,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744859971] [2023-11-29 03:48:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:01,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:01,689 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:01,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 03:48:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:48:01,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 03:48:01,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:01,910 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 03:48:01,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:02,161 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 03:48:02,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:02,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361099185] [2023-11-29 03:48:02,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:48:02,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744859971] [2023-11-29 03:48:02,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744859971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:02,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:48:02,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-11-29 03:48:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079468117] [2023-11-29 03:48:02,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:02,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 03:48:02,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:02,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 03:48:02,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-11-29 03:48:02,164 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 03:48:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:48:07,552 INFO L93 Difference]: Finished difference Result 7652 states and 11156 transitions. [2023-11-29 03:48:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 03:48:07,553 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 03:48:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:48:07,593 INFO L225 Difference]: With dead ends: 7652 [2023-11-29 03:48:07,593 INFO L226 Difference]: Without dead ends: 5958 [2023-11-29 03:48:07,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 03:48:07,599 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 425 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:48:07,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 456 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:48:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5958 states. [2023-11-29 03:48:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5958 to 5719. [2023-11-29 03:48:12,227 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 03:48:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 8167 transitions. [2023-11-29 03:48:12,242 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 8167 transitions. Word has length 93 [2023-11-29 03:48:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:48:12,242 INFO L495 AbstractCegarLoop]: Abstraction has 5719 states and 8167 transitions. [2023-11-29 03:48:12,242 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 03:48:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 8167 transitions. [2023-11-29 03:48:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 03:48:12,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:48:12,244 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 03:48:12,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 03:48:12,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:12,445 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:48:12,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:48:12,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2030329448, now seen corresponding path program 2 times [2023-11-29 03:48:12,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:48:12,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081885662] [2023-11-29 03:48:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:12,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:48:12,453 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:48:12,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113095074] [2023-11-29 03:48:12,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:48:12,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:12,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:12,454 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:12,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 03:48:12,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:48:12,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:48:12,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:48:12,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:12,602 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 03:48:12,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:12,688 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 03:48:12,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:12,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081885662] [2023-11-29 03:48:12,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:48:12,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113095074] [2023-11-29 03:48:12,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113095074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:12,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:48:12,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-11-29 03:48:12,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048912952] [2023-11-29 03:48:12,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:12,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 03:48:12,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:12,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 03:48:12,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-29 03:48:12,691 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 03:48:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:48:19,497 INFO L93 Difference]: Finished difference Result 8659 states and 12685 transitions. [2023-11-29 03:48:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 03:48:19,498 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 03:48:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:48:19,542 INFO L225 Difference]: With dead ends: 8659 [2023-11-29 03:48:19,543 INFO L226 Difference]: Without dead ends: 7853 [2023-11-29 03:48:19,548 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 03:48:19,548 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 175 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:48:19,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 540 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 03:48:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7853 states. [2023-11-29 03:48:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7853 to 6023. [2023-11-29 03:48:24,314 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 03:48:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 8623 transitions. [2023-11-29 03:48:24,337 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 8623 transitions. Word has length 94 [2023-11-29 03:48:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:48:24,337 INFO L495 AbstractCegarLoop]: Abstraction has 6023 states and 8623 transitions. [2023-11-29 03:48:24,338 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 03:48:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 8623 transitions. [2023-11-29 03:48:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 03:48:24,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:48:24,340 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 03:48:24,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 03:48:24,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 03:48:24,541 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:48:24,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:48:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 405051577, now seen corresponding path program 2 times [2023-11-29 03:48:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:48:24,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736383188] [2023-11-29 03:48:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:48:24,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:48:24,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:48:24,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71593964] [2023-11-29 03:48:24,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:48:24,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:48:24,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:48:24,553 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:48:24,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 03:48:24,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:48:24,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:48:24,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 03:48:24,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:48:26,002 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 03:48:26,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:48:32,549 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 03:48:32,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:48:32,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736383188] [2023-11-29 03:48:32,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:48:32,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71593964] [2023-11-29 03:48:32,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71593964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:48:32,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:48:32,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-11-29 03:48:32,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629410943] [2023-11-29 03:48:32,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:48:32,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 03:48:32,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:48:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 03:48:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2023-11-29 03:48:32,552 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 03:49:02,851 WARN L293 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 83 DAG size of output: 89 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:49:40,273 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 03:49:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:49:54,834 INFO L93 Difference]: Finished difference Result 9545 states and 13667 transitions. [2023-11-29 03:49:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 03:49:54,834 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 03:49:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:49:54,855 INFO L225 Difference]: With dead ends: 9545 [2023-11-29 03:49:54,855 INFO L226 Difference]: Without dead ends: 7148 [2023-11-29 03:49:54,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 66.9s TimeCoverageRelationStatistics Valid=1727, Invalid=8173, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 03:49:54,868 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 407 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-11-29 03:49:54,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1102 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2023-11-29 03:49:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7148 states. [2023-11-29 03:50:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7148 to 6340. [2023-11-29 03:50:00,084 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 03:50:00,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 9080 transitions. [2023-11-29 03:50:00,102 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 9080 transitions. Word has length 103 [2023-11-29 03:50:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:50:00,102 INFO L495 AbstractCegarLoop]: Abstraction has 6340 states and 9080 transitions. [2023-11-29 03:50:00,103 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 03:50:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 9080 transitions. [2023-11-29 03:50:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 03:50:00,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:50:00,105 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 03:50:00,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 03:50:00,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 03:50:00,305 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:50:00,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1545119728, now seen corresponding path program 1 times [2023-11-29 03:50:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:00,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144351906] [2023-11-29 03:50:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:00,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:00,315 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:50:00,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646836978] [2023-11-29 03:50:00,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:00,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:00,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:00,316 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:00,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 03:50:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:00,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 03:50:00,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:00,524 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 03:50:00,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:00,744 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 03:50:00,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:00,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144351906] [2023-11-29 03:50:00,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:50:00,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646836978] [2023-11-29 03:50:00,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646836978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:00,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:50:00,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-11-29 03:50:00,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228532067] [2023-11-29 03:50:00,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:00,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 03:50:00,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:00,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 03:50:00,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-11-29 03:50:00,747 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 03:50:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:50:07,025 INFO L93 Difference]: Finished difference Result 11057 states and 15901 transitions. [2023-11-29 03:50:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 03:50:07,026 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 03:50:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:50:07,041 INFO L225 Difference]: With dead ends: 11057 [2023-11-29 03:50:07,041 INFO L226 Difference]: Without dead ends: 6904 [2023-11-29 03:50:07,050 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 03:50:07,050 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 563 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 03:50:07,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 420 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 03:50:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2023-11-29 03:50:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 6752. [2023-11-29 03:50:13,745 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 03:50:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6752 states to 6752 states and 9385 transitions. [2023-11-29 03:50:13,766 INFO L78 Accepts]: Start accepts. Automaton has 6752 states and 9385 transitions. Word has length 105 [2023-11-29 03:50:13,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:50:13,766 INFO L495 AbstractCegarLoop]: Abstraction has 6752 states and 9385 transitions. [2023-11-29 03:50:13,766 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 03:50:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 6752 states and 9385 transitions. [2023-11-29 03:50:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 03:50:13,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:50:13,769 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 03:50:13,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 03:50:13,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 03:50:13,970 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:50:13,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1665108998, now seen corresponding path program 1 times [2023-11-29 03:50:13,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:13,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798805531] [2023-11-29 03:50:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:13,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:13,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:50:13,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444628509] [2023-11-29 03:50:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:13,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:13,983 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:13,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 03:50:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:14,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 03:50:14,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:14,462 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 03:50:14,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:15,913 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 03:50:15,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798805531] [2023-11-29 03:50:15,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:50:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444628509] [2023-11-29 03:50:15,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444628509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:15,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:50:15,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-11-29 03:50:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752026096] [2023-11-29 03:50:15,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:15,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 03:50:15,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 03:50:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-29 03:50:15,916 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 03:50:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:50:31,843 INFO L93 Difference]: Finished difference Result 14720 states and 21098 transitions. [2023-11-29 03:50:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 03:50:31,843 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 03:50:31,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:50:31,892 INFO L225 Difference]: With dead ends: 14720 [2023-11-29 03:50:31,892 INFO L226 Difference]: Without dead ends: 10743 [2023-11-29 03:50:31,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 03:50:31,905 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 213 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 03:50:31,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 528 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 03:50:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10743 states. [2023-11-29 03:50:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10743 to 10207. [2023-11-29 03:50:44,828 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 03:50:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 14864 transitions. [2023-11-29 03:50:44,876 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 14864 transitions. Word has length 118 [2023-11-29 03:50:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:50:44,877 INFO L495 AbstractCegarLoop]: Abstraction has 10207 states and 14864 transitions. [2023-11-29 03:50:44,877 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 03:50:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 14864 transitions. [2023-11-29 03:50:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 03:50:44,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:50:44,880 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 03:50:44,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 03:50:45,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 03:50:45,081 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:50:45,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:45,081 INFO L85 PathProgramCache]: Analyzing trace with hash -465572137, now seen corresponding path program 2 times [2023-11-29 03:50:45,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:45,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808255255] [2023-11-29 03:50:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:45,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:45,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:50:45,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390338369] [2023-11-29 03:50:45,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:50:45,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:45,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:45,092 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:45,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 03:50:45,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:50:45,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:50:45,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 03:50:45,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:47,193 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 03:50:47,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:51,319 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 03:50:51,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:51,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808255255] [2023-11-29 03:50:51,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:50:51,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390338369] [2023-11-29 03:50:51,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390338369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:51,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:50:51,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2023-11-29 03:50:51,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670666888] [2023-11-29 03:50:51,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:51,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 03:50:51,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 03:50:51,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 03:50:51,323 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 03:50:58,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:51:02,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:51:06,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:51:53,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:51:58,863 WARN L293 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:52:17,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:52:21,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:52:58,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:52:58,517 INFO L93 Difference]: Finished difference Result 13622 states and 19898 transitions. [2023-11-29 03:52:58,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-29 03:52:58,517 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 03:52:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:52:58,552 INFO L225 Difference]: With dead ends: 13622 [2023-11-29 03:52:58,552 INFO L226 Difference]: Without dead ends: 13616 [2023-11-29 03:52:58,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4255 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=2442, Invalid=9548, Unknown=0, NotChecked=0, Total=11990 [2023-11-29 03:52:58,559 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 575 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 366 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:52:58,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 1561 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 1464 Invalid, 5 Unknown, 0 Unchecked, 45.2s Time] [2023-11-29 03:52:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13616 states. [2023-11-29 03:53:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13616 to 12221. [2023-11-29 03:53:14,755 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 03:53:14,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12221 states to 12221 states and 17705 transitions. [2023-11-29 03:53:14,797 INFO L78 Accepts]: Start accepts. Automaton has 12221 states and 17705 transitions. Word has length 120 [2023-11-29 03:53:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:53:14,798 INFO L495 AbstractCegarLoop]: Abstraction has 12221 states and 17705 transitions. [2023-11-29 03:53:14,798 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 03:53:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 12221 states and 17705 transitions. [2023-11-29 03:53:14,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 03:53:14,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:53:14,802 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 03:53:14,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 03:53:15,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 03:53:15,002 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:53:15,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:53:15,003 INFO L85 PathProgramCache]: Analyzing trace with hash -222400974, now seen corresponding path program 2 times [2023-11-29 03:53:15,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:53:15,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208689627] [2023-11-29 03:53:15,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:53:15,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:53:15,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:53:15,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295457169] [2023-11-29 03:53:15,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:53:15,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:53:15,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:53:15,016 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:53:15,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 03:53:15,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:53:15,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:53:15,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 03:53:15,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:53:15,480 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 03:53:15,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:53:15,963 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 03:53:15,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:53:15,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208689627] [2023-11-29 03:53:15,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:53:15,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295457169] [2023-11-29 03:53:15,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295457169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:53:15,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:53:15,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-11-29 03:53:15,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120845656] [2023-11-29 03:53:15,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:53:15,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 03:53:15,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:53:15,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 03:53:15,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 03:53:15,968 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 03:53:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:53:49,453 INFO L93 Difference]: Finished difference Result 26603 states and 40294 transitions. [2023-11-29 03:53:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 03:53:49,454 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 03:53:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:53:49,516 INFO L225 Difference]: With dead ends: 26603 [2023-11-29 03:53:49,516 INFO L226 Difference]: Without dead ends: 26561 [2023-11-29 03:53:49,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 03:53:49,525 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 842 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 03:53:49,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 564 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 03:53:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26561 states. [2023-11-29 03:54:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26561 to 25558. [2023-11-29 03:54:21,038 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 03:54:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25558 states to 25558 states and 38175 transitions. [2023-11-29 03:54:21,133 INFO L78 Accepts]: Start accepts. Automaton has 25558 states and 38175 transitions. Word has length 127 [2023-11-29 03:54:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:54:21,134 INFO L495 AbstractCegarLoop]: Abstraction has 25558 states and 38175 transitions. [2023-11-29 03:54:21,134 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 03:54:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 25558 states and 38175 transitions. [2023-11-29 03:54:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 03:54:21,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:54:21,138 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 03:54:21,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 03:54:21,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 03:54:21,339 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:54:21,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:54:21,339 INFO L85 PathProgramCache]: Analyzing trace with hash 554616671, now seen corresponding path program 3 times [2023-11-29 03:54:21,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:54:21,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064627028] [2023-11-29 03:54:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:54:21,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:54:21,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:54:21,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924519373] [2023-11-29 03:54:21,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:54:21,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:21,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:54:21,352 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:54:21,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 03:54:21,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 03:54:21,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:54:21,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 03:54:21,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:54:25,098 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 03:54:25,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:54:29,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:54:29,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064627028] [2023-11-29 03:54:29,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:54:29,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924519373] [2023-11-29 03:54:29,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924519373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:54:29,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:54:29,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-29 03:54:29,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168381206] [2023-11-29 03:54:29,895 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 03:54:29,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 03:54:29,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:54:29,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 03:54:29,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 03:54:29,897 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 03:55:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:55:15,738 INFO L93 Difference]: Finished difference Result 28543 states and 42597 transitions. [2023-11-29 03:55:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 03:55:15,739 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 03:55:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:55:15,826 INFO L225 Difference]: With dead ends: 28543 [2023-11-29 03:55:15,827 INFO L226 Difference]: Without dead ends: 28453 [2023-11-29 03:55:15,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 03:55:15,838 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 111 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 03:55:15,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1039 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 03:55:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28453 states. [2023-11-29 03:55:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28453 to 27913. [2023-11-29 03:55:57,422 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 03:55:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27913 states to 27913 states and 41736 transitions. [2023-11-29 03:55:57,529 INFO L78 Accepts]: Start accepts. Automaton has 27913 states and 41736 transitions. Word has length 133 [2023-11-29 03:55:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:55:57,530 INFO L495 AbstractCegarLoop]: Abstraction has 27913 states and 41736 transitions. [2023-11-29 03:55:57,530 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 03:55:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 27913 states and 41736 transitions. [2023-11-29 03:55:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 03:55:57,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:55:57,533 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 03:55:57,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 03:55:57,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 03:55:57,734 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:55:57,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:55:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash 640147735, now seen corresponding path program 4 times [2023-11-29 03:55:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:55:57,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633278078] [2023-11-29 03:55:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:55:57,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:55:57,745 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:55:57,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646254682] [2023-11-29 03:55:57,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:55:57,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:55:57,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:55:57,747 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:55:57,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a4c04c-a749-4aee-8e5b-3e5d826cbec3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 03:55:57,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:55:57,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:55:57,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 03:55:57,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:56:00,032 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 03:56:00,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:56:33,931 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 03:56:33,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:56:33,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633278078] [2023-11-29 03:56:33,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:56:33,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646254682] [2023-11-29 03:56:33,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646254682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:56:33,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:56:33,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2023-11-29 03:56:33,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891225740] [2023-11-29 03:56:33,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:56:33,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 03:56:33,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:56:33,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 03:56:33,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 03:56:33,934 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 03:56:47,476 WARN L293 SmtUtils]: Spent 9.70s 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 03:57:11,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:57:25,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:57:50,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:57:52,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:58:25,388 WARN L293 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 119 DAG size of output: 117 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:58:58,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:59:03,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:59:12,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:59:18,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:59:22,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 03:59:25,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 04:00:07,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:00:07,216 INFO L93 Difference]: Finished difference Result 33389 states and 49467 transitions. [2023-11-29 04:00:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 04:00:07,216 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 04:00:07,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:00:07,285 INFO L225 Difference]: With dead ends: 33389 [2023-11-29 04:00:07,285 INFO L226 Difference]: Without dead ends: 33298 [2023-11-29 04:00:07,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3177 ImplicationChecksByTransitivity, 115.5s TimeCoverageRelationStatistics Valid=2288, Invalid=9053, Unknown=1, NotChecked=0, Total=11342 [2023-11-29 04:00:07,295 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 554 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 472 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:00:07,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1766 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 1643 Invalid, 2 Unknown, 0 Unchecked, 50.5s Time] [2023-11-29 04:00:07,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33298 states.