./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx --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 fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:17:38,652 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:17:38,770 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:17:38,781 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:17:38,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:17:38,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:17:38,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:17:38,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:17:38,825 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:17:38,830 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:17:38,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:17:38,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:17:38,832 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:17:38,834 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:17:38,834 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:17:38,835 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:17:38,835 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:17:38,836 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:17:38,836 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:17:38,837 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:17:38,837 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:17:38,838 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:17:38,838 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:17:38,839 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:17:38,839 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:17:38,840 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:17:38,840 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:17:38,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:17:38,842 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:17:38,842 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:17:38,844 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:17:38,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:17:38,844 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:17:38,845 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:17:38,845 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:17:38,845 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:17:38,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:17:38,846 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:17:38,846 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:17:38,846 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:17:38,847 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:17:38,847 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:17:38,847 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_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 [2023-11-21 22:17:39,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:17:39,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:17:39,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:17:39,208 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:17:39,208 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:17:39,210 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2023-11-21 22:17:42,387 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:17:42,661 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:17:42,663 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2023-11-21 22:17:42,673 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/data/0af06aff4/aedf3f956d9048db9863d135c759ddbe/FLAGb2110723e [2023-11-21 22:17:42,691 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/data/0af06aff4/aedf3f956d9048db9863d135c759ddbe [2023-11-21 22:17:42,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:17:42,699 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:17:42,702 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:17:42,702 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:17:42,708 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:17:42,709 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:17:42" (1/1) ... [2023-11-21 22:17:42,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e65a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:42, skipping insertion in model container [2023-11-21 22:17:42,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:17:42" (1/1) ... [2023-11-21 22:17:42,742 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:17:42,937 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_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2023-11-21 22:17:42,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:17:42,982 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:17:43,000 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_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2023-11-21 22:17:43,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:17:43,027 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:17:43,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43 WrapperNode [2023-11-21 22:17:43,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:17:43,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:17:43,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:17:43,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:17:43,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,047 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,075 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2023-11-21 22:17:43,076 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:17:43,077 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:17:43,077 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:17:43,077 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:17:43,088 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,090 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,112 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:17:43,113 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,117 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,121 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,122 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,123 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:17:43,127 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:17:43,127 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:17:43,127 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:17:43,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (1/1) ... [2023-11-21 22:17:43,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:17:43,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:43,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:17:43,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:17:43,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:17:43,203 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 22:17:43,203 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 22:17:43,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:17:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:17:43,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:17:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 22:17:43,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 22:17:43,291 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:17:43,293 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:17:43,611 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:17:43,682 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:17:43,682 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 22:17:43,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:17:43 BoogieIcfgContainer [2023-11-21 22:17:43,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:17:43,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:17:43,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:17:43,692 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:17:43,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:17:42" (1/3) ... [2023-11-21 22:17:43,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b13d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:17:43, skipping insertion in model container [2023-11-21 22:17:43,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:43" (2/3) ... [2023-11-21 22:17:43,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b13d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:17:43, skipping insertion in model container [2023-11-21 22:17:43,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:17:43" (3/3) ... [2023-11-21 22:17:43,699 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2023-11-21 22:17:43,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:17:43,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:17:43,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:17:43,803 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;@6c79f77b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:17:43,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:17:43,807 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-21 22:17:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 22:17:43,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:43,814 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:43,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:43,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:43,819 INFO L85 PathProgramCache]: Analyzing trace with hash 966807424, now seen corresponding path program 1 times [2023-11-21 22:17:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:43,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889832094] [2023-11-21 22:17:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:43,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:43,932 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:43,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093638231] [2023-11-21 22:17:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:43,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:43,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:43,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:43,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:17:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:44,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-21 22:17:44,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 22:17:44,061 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:17:44,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:44,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889832094] [2023-11-21 22:17:44,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093638231] [2023-11-21 22:17:44,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093638231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:44,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:44,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:17:44,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061458120] [2023-11-21 22:17:44,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:44,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 22:17:44,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 22:17:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:17:44,109 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 22:17:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:44,157 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2023-11-21 22:17:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 22:17:44,159 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2023-11-21 22:17:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:44,166 INFO L225 Difference]: With dead ends: 49 [2023-11-21 22:17:44,167 INFO L226 Difference]: Without dead ends: 28 [2023-11-21 22:17:44,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:17:44,174 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:44,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:17:44,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-21 22:17:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-21 22:17:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-21 22:17:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2023-11-21 22:17:44,212 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 26 [2023-11-21 22:17:44,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:44,214 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2023-11-21 22:17:44,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 22:17:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2023-11-21 22:17:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 22:17:44,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:44,217 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:44,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:44,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 22:17:44,419 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:44,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1643993843, now seen corresponding path program 1 times [2023-11-21 22:17:44,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:44,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402270989] [2023-11-21 22:17:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:44,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:44,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:44,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947676373] [2023-11-21 22:17:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:44,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:44,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:44,474 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:44,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:17:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:44,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 22:17:44,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-21 22:17:44,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:17:45,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:45,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402270989] [2023-11-21 22:17:45,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:45,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947676373] [2023-11-21 22:17:45,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947676373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:17:45,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:17:45,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-21 22:17:45,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311541098] [2023-11-21 22:17:45,006 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 22:17:45,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:17:45,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:45,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:17:45,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:17:45,010 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-21 22:17:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:45,269 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2023-11-21 22:17:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:17:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 27 [2023-11-21 22:17:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:45,272 INFO L225 Difference]: With dead ends: 45 [2023-11-21 22:17:45,272 INFO L226 Difference]: Without dead ends: 43 [2023-11-21 22:17:45,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:17:45,275 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:45,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 107 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:17:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-21 22:17:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-11-21 22:17:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-21 22:17:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2023-11-21 22:17:45,294 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 27 [2023-11-21 22:17:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:45,294 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2023-11-21 22:17:45,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-21 22:17:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2023-11-21 22:17:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 22:17:45,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:45,297 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:45,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:45,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:45,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:45,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:45,519 INFO L85 PathProgramCache]: Analyzing trace with hash -575116102, now seen corresponding path program 1 times [2023-11-21 22:17:45,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:45,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049790385] [2023-11-21 22:17:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:45,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:45,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:45,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747233755] [2023-11-21 22:17:45,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:45,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:45,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:45,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:45,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:17:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:45,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:17:45,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 22:17:45,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:17:45,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:45,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049790385] [2023-11-21 22:17:45,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:45,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747233755] [2023-11-21 22:17:45,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747233755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:45,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:45,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:17:45,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166402748] [2023-11-21 22:17:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:45,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:17:45,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:17:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:17:45,673 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 22:17:45,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:45,737 INFO L93 Difference]: Finished difference Result 60 states and 86 transitions. [2023-11-21 22:17:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:17:45,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 28 [2023-11-21 22:17:45,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:45,740 INFO L225 Difference]: With dead ends: 60 [2023-11-21 22:17:45,740 INFO L226 Difference]: Without dead ends: 58 [2023-11-21 22:17:45,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:17:45,742 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:45,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 123 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:17:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-21 22:17:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2023-11-21 22:17:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.2) internal successors, (30), 29 states have internal predecessors, (30), 19 states have call successors, (19), 4 states have call predecessors, (19), 4 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-21 22:17:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2023-11-21 22:17:45,761 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 28 [2023-11-21 22:17:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:45,762 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2023-11-21 22:17:45,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-21 22:17:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2023-11-21 22:17:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 22:17:45,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:45,764 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-11-21 22:17:45,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:45,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:45,984 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:45,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:45,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1653487282, now seen corresponding path program 1 times [2023-11-21 22:17:45,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:45,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743404615] [2023-11-21 22:17:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:45,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:46,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:46,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942965704] [2023-11-21 22:17:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:46,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:46,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:46,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:46,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:17:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:46,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 22:17:46,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-21 22:17:46,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:17:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-21 22:17:46,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:46,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743404615] [2023-11-21 22:17:46,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:46,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942965704] [2023-11-21 22:17:46,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942965704] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:17:46,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:17:46,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-21 22:17:46,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696690792] [2023-11-21 22:17:46,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:46,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:17:46,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:17:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:17:46,386 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 22:17:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:46,495 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-11-21 22:17:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:17:46,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 32 [2023-11-21 22:17:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:46,499 INFO L225 Difference]: With dead ends: 57 [2023-11-21 22:17:46,499 INFO L226 Difference]: Without dead ends: 53 [2023-11-21 22:17:46,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:17:46,504 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:46,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 117 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:17:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-21 22:17:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-11-21 22:17:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-21 22:17:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2023-11-21 22:17:46,533 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 32 [2023-11-21 22:17:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:46,534 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2023-11-21 22:17:46,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-21 22:17:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2023-11-21 22:17:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 22:17:46,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:46,536 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:46,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:46,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-21 22:17:46,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:46,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:46,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1793667961, now seen corresponding path program 1 times [2023-11-21 22:17:46,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:46,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576599709] [2023-11-21 22:17:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:46,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:46,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:46,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406742762] [2023-11-21 22:17:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:46,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:46,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:46,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:17:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:46,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-21 22:17:46,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-21 22:17:47,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:17:47,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:47,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576599709] [2023-11-21 22:17:47,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:47,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406742762] [2023-11-21 22:17:47,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406742762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:47,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:47,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:17:47,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198386190] [2023-11-21 22:17:47,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:47,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:17:47,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:17:47,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:17:47,026 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 22:17:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:47,100 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2023-11-21 22:17:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:17:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2023-11-21 22:17:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:47,102 INFO L225 Difference]: With dead ends: 59 [2023-11-21 22:17:47,102 INFO L226 Difference]: Without dead ends: 57 [2023-11-21 22:17:47,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:17:47,104 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:47,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 113 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:17:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-21 22:17:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-11-21 22:17:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-21 22:17:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-11-21 22:17:47,123 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 43 [2023-11-21 22:17:47,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:47,124 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-11-21 22:17:47,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 22:17:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-11-21 22:17:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 22:17:47,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:47,126 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 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, 1] [2023-11-21 22:17:47,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:47,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:47,346 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:47,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2137702023, now seen corresponding path program 1 times [2023-11-21 22:17:47,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:47,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706183398] [2023-11-21 22:17:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:47,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:47,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:47,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570936851] [2023-11-21 22:17:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:47,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:47,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:47,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:47,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:17:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:47,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 22:17:47,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-21 22:17:47,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:17:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-21 22:17:47,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:47,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706183398] [2023-11-21 22:17:47,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:47,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570936851] [2023-11-21 22:17:47,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570936851] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 22:17:47,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:17:47,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-21 22:17:47,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690474357] [2023-11-21 22:17:47,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:47,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:17:47,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:17:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:17:47,627 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-21 22:17:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:47,688 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2023-11-21 22:17:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:17:47,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 50 [2023-11-21 22:17:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:47,691 INFO L225 Difference]: With dead ends: 62 [2023-11-21 22:17:47,691 INFO L226 Difference]: Without dead ends: 60 [2023-11-21 22:17:47,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:17:47,692 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:47,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 111 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:17:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-21 22:17:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2023-11-21 22:17:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-21 22:17:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2023-11-21 22:17:47,710 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 50 [2023-11-21 22:17:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:47,711 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2023-11-21 22:17:47,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-21 22:17:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2023-11-21 22:17:47,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-21 22:17:47,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:47,713 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 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, 1, 1, 1, 1, 1] [2023-11-21 22:17:47,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-21 22:17:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:47,934 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:47,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash 434944611, now seen corresponding path program 1 times [2023-11-21 22:17:47,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:47,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353244051] [2023-11-21 22:17:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:47,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:47,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:47,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812818458] [2023-11-21 22:17:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:47,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:47,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:47,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:47,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:17:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:48,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:17:48,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-21 22:17:48,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:17:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-21 22:17:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:48,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353244051] [2023-11-21 22:17:48,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:48,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812818458] [2023-11-21 22:17:48,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812818458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:17:48,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:17:48,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-11-21 22:17:48,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946458566] [2023-11-21 22:17:48,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:17:48,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:17:48,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:48,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:17:48,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:17:48,194 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-21 22:17:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:48,397 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2023-11-21 22:17:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:17:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2023-11-21 22:17:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:48,400 INFO L225 Difference]: With dead ends: 99 [2023-11-21 22:17:48,400 INFO L226 Difference]: Without dead ends: 91 [2023-11-21 22:17:48,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:17:48,401 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:48,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 203 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:17:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-21 22:17:48,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2023-11-21 22:17:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 44 states have internal predecessors, (52), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-21 22:17:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 115 transitions. [2023-11-21 22:17:48,440 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 115 transitions. Word has length 52 [2023-11-21 22:17:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:48,440 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 115 transitions. [2023-11-21 22:17:48,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-21 22:17:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 115 transitions. [2023-11-21 22:17:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-21 22:17:48,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:48,442 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 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] [2023-11-21 22:17:48,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:48,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:48,664 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:48,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:48,664 INFO L85 PathProgramCache]: Analyzing trace with hash -243308457, now seen corresponding path program 1 times [2023-11-21 22:17:48,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:48,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111350690] [2023-11-21 22:17:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:48,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:48,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:48,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948609429] [2023-11-21 22:17:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:48,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:48,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:48,683 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:48,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:17:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:48,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-21 22:17:48,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-21 22:17:49,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:17:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-21 22:17:49,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:49,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111350690] [2023-11-21 22:17:49,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:49,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948609429] [2023-11-21 22:17:49,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948609429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:17:49,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:17:49,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2023-11-21 22:17:49,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096913029] [2023-11-21 22:17:49,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:17:49,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:17:49,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:49,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:17:49,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:17:49,545 INFO L87 Difference]: Start difference. First operand 82 states and 115 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-21 22:17:50,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:50,212 INFO L93 Difference]: Finished difference Result 117 states and 166 transitions. [2023-11-21 22:17:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:17:50,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 58 [2023-11-21 22:17:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:50,225 INFO L225 Difference]: With dead ends: 117 [2023-11-21 22:17:50,225 INFO L226 Difference]: Without dead ends: 114 [2023-11-21 22:17:50,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2023-11-21 22:17:50,227 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:50,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 263 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:17:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-21 22:17:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2023-11-21 22:17:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 60 states have internal predecessors, (71), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-21 22:17:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 159 transitions. [2023-11-21 22:17:50,305 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 159 transitions. Word has length 58 [2023-11-21 22:17:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:50,306 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 159 transitions. [2023-11-21 22:17:50,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-21 22:17:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 159 transitions. [2023-11-21 22:17:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-21 22:17:50,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:50,313 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:50,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:50,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:50,529 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:50,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1216164650, now seen corresponding path program 2 times [2023-11-21 22:17:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:50,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214993752] [2023-11-21 22:17:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:50,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:50,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:50,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795311865] [2023-11-21 22:17:50,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:17:50,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:50,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:50,565 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:50,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:17:50,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:17:50,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:17:50,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-21 22:17:50,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-21 22:17:51,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:17:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-21 22:17:51,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:51,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214993752] [2023-11-21 22:17:51,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:51,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795311865] [2023-11-21 22:17:51,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795311865] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:17:51,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:17:51,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2023-11-21 22:17:51,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118430290] [2023-11-21 22:17:51,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:17:51,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:17:51,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:51,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:17:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:17:51,430 INFO L87 Difference]: Start difference. First operand 111 states and 159 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-21 22:17:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:53,689 INFO L93 Difference]: Finished difference Result 255 states and 392 transitions. [2023-11-21 22:17:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 22:17:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 63 [2023-11-21 22:17:53,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:53,698 INFO L225 Difference]: With dead ends: 255 [2023-11-21 22:17:53,698 INFO L226 Difference]: Without dead ends: 253 [2023-11-21 22:17:53,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2023-11-21 22:17:53,703 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 135 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:53,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 214 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:17:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-21 22:17:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 221. [2023-11-21 22:17:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 114 states have (on average 1.2719298245614035) internal successors, (145), 116 states have internal predecessors, (145), 97 states have call successors, (97), 9 states have call predecessors, (97), 9 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-21 22:17:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 337 transitions. [2023-11-21 22:17:53,870 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 337 transitions. Word has length 63 [2023-11-21 22:17:53,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:53,870 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 337 transitions. [2023-11-21 22:17:53,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-11-21 22:17:53,871 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 337 transitions. [2023-11-21 22:17:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-21 22:17:53,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:53,872 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:53,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:54,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:54,089 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:54,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -491172873, now seen corresponding path program 3 times [2023-11-21 22:17:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:54,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022165444] [2023-11-21 22:17:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:54,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:54,103 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:54,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671831878] [2023-11-21 22:17:54,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:17:54,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:54,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:54,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:17:54,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-21 22:17:54,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:17:54,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-21 22:17:54,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 39 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-21 22:17:55,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:17:56,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022165444] [2023-11-21 22:17:56,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671831878] [2023-11-21 22:17:56,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671831878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:17:56,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:17:56,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-21 22:17:56,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971961967] [2023-11-21 22:17:56,627 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 22:17:56,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:17:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:17:56,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:17:56,629 INFO L87 Difference]: Start difference. First operand 221 states and 337 transitions. Second operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2023-11-21 22:17:57,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:17:57,509 INFO L93 Difference]: Finished difference Result 238 states and 351 transitions. [2023-11-21 22:17:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:17:57,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 68 [2023-11-21 22:17:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:17:57,512 INFO L225 Difference]: With dead ends: 238 [2023-11-21 22:17:57,512 INFO L226 Difference]: Without dead ends: 236 [2023-11-21 22:17:57,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:17:57,514 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:17:57,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 159 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:17:57,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-21 22:17:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2023-11-21 22:17:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 123 states have (on average 1.2520325203252032) internal successors, (154), 125 states have internal predecessors, (154), 97 states have call successors, (97), 12 states have call predecessors, (97), 12 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2023-11-21 22:17:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 346 transitions. [2023-11-21 22:17:57,614 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 346 transitions. Word has length 68 [2023-11-21 22:17:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:17:57,614 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 346 transitions. [2023-11-21 22:17:57,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2023-11-21 22:17:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 346 transitions. [2023-11-21 22:17:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-21 22:17:57,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:17:57,616 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:57,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:57,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:57,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:17:57,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:57,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2003369438, now seen corresponding path program 1 times [2023-11-21 22:17:57,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:57,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052003044] [2023-11-21 22:17:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:57,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:57,846 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:17:57,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689273556] [2023-11-21 22:17:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:57,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:57,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:57,854 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:57,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 22:17:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:57,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-21 22:17:57,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-11-21 22:17:58,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:17:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-21 22:17:59,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:59,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052003044] [2023-11-21 22:17:59,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:17:59,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689273556] [2023-11-21 22:17:59,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689273556] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:17:59,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:17:59,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-11-21 22:17:59,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370648989] [2023-11-21 22:17:59,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:17:59,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-21 22:17:59,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:59,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-21 22:17:59,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:17:59,087 INFO L87 Difference]: Start difference. First operand 233 states and 346 transitions. Second operand has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-21 22:18:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:03,226 INFO L93 Difference]: Finished difference Result 350 states and 532 transitions. [2023-11-21 22:18:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-21 22:18:03,227 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 74 [2023-11-21 22:18:03,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:03,236 INFO L225 Difference]: With dead ends: 350 [2023-11-21 22:18:03,236 INFO L226 Difference]: Without dead ends: 346 [2023-11-21 22:18:03,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=303, Invalid=1257, Unknown=0, NotChecked=0, Total=1560 [2023-11-21 22:18:03,238 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 91 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:03,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 415 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-21 22:18:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-21 22:18:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2023-11-21 22:18:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 176 states have (on average 1.2670454545454546) internal successors, (223), 179 states have internal predecessors, (223), 150 states have call successors, (150), 15 states have call predecessors, (150), 15 states have return successors, (148), 147 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-21 22:18:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 521 transitions. [2023-11-21 22:18:03,498 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 521 transitions. Word has length 74 [2023-11-21 22:18:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:03,499 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 521 transitions. [2023-11-21 22:18:03,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-11-21 22:18:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 521 transitions. [2023-11-21 22:18:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-21 22:18:03,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:03,501 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 3, 3, 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] [2023-11-21 22:18:03,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:03,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 22:18:03,716 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:03,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2021661415, now seen corresponding path program 4 times [2023-11-21 22:18:03,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:03,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029068696] [2023-11-21 22:18:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:03,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:03,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:18:03,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300776440] [2023-11-21 22:18:03,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:18:03,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:03,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:03,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:03,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 22:18:03,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:18:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:03,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:18:03,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-21 22:18:03,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:18:03,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:03,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029068696] [2023-11-21 22:18:03,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:18:03,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300776440] [2023-11-21 22:18:03,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300776440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:18:03,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:18:03,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:18:03,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999131366] [2023-11-21 22:18:03,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:18:03,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:18:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:18:03,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:18:03,848 INFO L87 Difference]: Start difference. First operand 342 states and 521 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-21 22:18:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:04,036 INFO L93 Difference]: Finished difference Result 411 states and 619 transitions. [2023-11-21 22:18:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:18:04,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 83 [2023-11-21 22:18:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:04,039 INFO L225 Difference]: With dead ends: 411 [2023-11-21 22:18:04,039 INFO L226 Difference]: Without dead ends: 240 [2023-11-21 22:18:04,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:18:04,043 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:04,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 151 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:18:04,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-21 22:18:04,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 191. [2023-11-21 22:18:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 101 states have internal predecessors, (115), 78 states have call successors, (78), 14 states have call predecessors, (78), 14 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-21 22:18:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 269 transitions. [2023-11-21 22:18:04,159 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 269 transitions. Word has length 83 [2023-11-21 22:18:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:04,159 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 269 transitions. [2023-11-21 22:18:04,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-21 22:18:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 269 transitions. [2023-11-21 22:18:04,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-21 22:18:04,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:04,161 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 3, 3, 3, 3, 3, 3, 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] [2023-11-21 22:18:04,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:04,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 22:18:04,376 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:04,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:04,377 INFO L85 PathProgramCache]: Analyzing trace with hash 145896886, now seen corresponding path program 1 times [2023-11-21 22:18:04,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:04,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104821337] [2023-11-21 22:18:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:04,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:04,391 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:18:04,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786869004] [2023-11-21 22:18:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:04,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:04,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:04,393 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:04,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 22:18:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:04,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-21 22:18:04,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 70 proven. 29 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2023-11-21 22:18:05,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:06,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104821337] [2023-11-21 22:18:06,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:18:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786869004] [2023-11-21 22:18:06,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786869004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:06,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:06,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-21 22:18:06,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449373703] [2023-11-21 22:18:06,225 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:06,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:18:06,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:06,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:18:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:18:06,227 INFO L87 Difference]: Start difference. First operand 191 states and 269 transitions. Second operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-21 22:18:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:07,423 INFO L93 Difference]: Finished difference Result 224 states and 314 transitions. [2023-11-21 22:18:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:18:07,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) Word has length 90 [2023-11-21 22:18:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:07,427 INFO L225 Difference]: With dead ends: 224 [2023-11-21 22:18:07,427 INFO L226 Difference]: Without dead ends: 222 [2023-11-21 22:18:07,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:18:07,429 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:07,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 348 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:18:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-11-21 22:18:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2023-11-21 22:18:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 113 states have (on average 1.168141592920354) internal successors, (132), 116 states have internal predecessors, (132), 90 states have call successors, (90), 16 states have call predecessors, (90), 16 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-21 22:18:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 310 transitions. [2023-11-21 22:18:07,582 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 310 transitions. Word has length 90 [2023-11-21 22:18:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:07,583 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 310 transitions. [2023-11-21 22:18:07,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-21 22:18:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 310 transitions. [2023-11-21 22:18:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-21 22:18:07,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:07,585 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-21 22:18:07,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-21 22:18:07,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:18:07,788 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:07,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2012729071, now seen corresponding path program 1 times [2023-11-21 22:18:07,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:07,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202879002] [2023-11-21 22:18:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:07,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:07,818 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:18:07,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587331816] [2023-11-21 22:18:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:07,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:07,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:07,825 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:07,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-21 22:18:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:07,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 22:18:07,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-11-21 22:18:07,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-21 22:18:08,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:08,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202879002] [2023-11-21 22:18:08,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:18:08,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587331816] [2023-11-21 22:18:08,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587331816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:08,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:18:08,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2023-11-21 22:18:08,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920801292] [2023-11-21 22:18:08,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:08,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:18:08,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:08,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:18:08,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:18:08,056 INFO L87 Difference]: Start difference. First operand 220 states and 310 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-21 22:18:08,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:08,395 INFO L93 Difference]: Finished difference Result 246 states and 349 transitions. [2023-11-21 22:18:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:18:08,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 104 [2023-11-21 22:18:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:08,398 INFO L225 Difference]: With dead ends: 246 [2023-11-21 22:18:08,398 INFO L226 Difference]: Without dead ends: 234 [2023-11-21 22:18:08,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:18:08,400 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:08,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 294 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:18:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-21 22:18:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 215. [2023-11-21 22:18:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 112 states have internal predecessors, (128), 89 states have call successors, (89), 15 states have call predecessors, (89), 15 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-21 22:18:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 304 transitions. [2023-11-21 22:18:08,546 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 304 transitions. Word has length 104 [2023-11-21 22:18:08,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:08,546 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 304 transitions. [2023-11-21 22:18:08,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-21 22:18:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 304 transitions. [2023-11-21 22:18:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-21 22:18:08,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:08,549 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:08,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:08,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:08,755 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:08,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:08,756 INFO L85 PathProgramCache]: Analyzing trace with hash 173280102, now seen corresponding path program 2 times [2023-11-21 22:18:08,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:08,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529167870] [2023-11-21 22:18:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:08,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:08,766 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:18:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565237876] [2023-11-21 22:18:08,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:18:08,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:08,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:08,768 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:08,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 22:18:08,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:18:08,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:08,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-21 22:18:08,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2023-11-21 22:18:09,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:09,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:09,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529167870] [2023-11-21 22:18:09,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:18:09,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565237876] [2023-11-21 22:18:09,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565237876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:09,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:09,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-21 22:18:09,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665008503] [2023-11-21 22:18:09,882 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:09,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:18:09,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:18:09,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:18:09,884 INFO L87 Difference]: Start difference. First operand 215 states and 304 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2023-11-21 22:18:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:10,790 INFO L93 Difference]: Finished difference Result 245 states and 347 transitions. [2023-11-21 22:18:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:18:10,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 105 [2023-11-21 22:18:10,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:10,795 INFO L225 Difference]: With dead ends: 245 [2023-11-21 22:18:10,795 INFO L226 Difference]: Without dead ends: 243 [2023-11-21 22:18:10,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2023-11-21 22:18:10,797 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 39 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:10,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 300 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:18:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-21 22:18:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2023-11-21 22:18:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 124 states have internal predecessors, (142), 101 states have call successors, (101), 16 states have call predecessors, (101), 16 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-21 22:18:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 342 transitions. [2023-11-21 22:18:10,948 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 342 transitions. Word has length 105 [2023-11-21 22:18:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:10,949 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 342 transitions. [2023-11-21 22:18:10,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2023-11-21 22:18:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 342 transitions. [2023-11-21 22:18:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-21 22:18:10,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:10,951 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:10,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:11,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:18:11,164 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:11,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:11,165 INFO L85 PathProgramCache]: Analyzing trace with hash -743497349, now seen corresponding path program 3 times [2023-11-21 22:18:11,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:11,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102519230] [2023-11-21 22:18:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:11,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:11,178 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:18:11,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250956438] [2023-11-21 22:18:11,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:18:11,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:11,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:11,180 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:11,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-21 22:18:11,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-21 22:18:11,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:11,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-21 22:18:11,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 89 proven. 48 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2023-11-21 22:18:12,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102519230] [2023-11-21 22:18:13,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:18:13,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250956438] [2023-11-21 22:18:13,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250956438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:13,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-21 22:18:13,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861795283] [2023-11-21 22:18:13,761 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:13,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:18:13,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:13,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:18:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:18:13,764 INFO L87 Difference]: Start difference. First operand 240 states and 342 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2023-11-21 22:18:14,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:14,635 INFO L93 Difference]: Finished difference Result 257 states and 356 transitions. [2023-11-21 22:18:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 22:18:14,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 110 [2023-11-21 22:18:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:14,639 INFO L225 Difference]: With dead ends: 257 [2023-11-21 22:18:14,639 INFO L226 Difference]: Without dead ends: 255 [2023-11-21 22:18:14,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2023-11-21 22:18:14,641 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 32 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:14,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 439 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:18:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-21 22:18:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2023-11-21 22:18:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 131 states have (on average 1.1526717557251909) internal successors, (151), 133 states have internal predecessors, (151), 101 states have call successors, (101), 19 states have call predecessors, (101), 19 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-21 22:18:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 351 transitions. [2023-11-21 22:18:14,843 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 351 transitions. Word has length 110 [2023-11-21 22:18:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:14,844 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 351 transitions. [2023-11-21 22:18:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2023-11-21 22:18:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 351 transitions. [2023-11-21 22:18:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-21 22:18:14,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:14,846 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:14,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:15,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 22:18:15,069 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:15,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:15,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1680324149, now seen corresponding path program 4 times [2023-11-21 22:18:15,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:15,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879992684] [2023-11-21 22:18:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:15,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:15,083 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:18:15,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053674611] [2023-11-21 22:18:15,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:18:15,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:15,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:15,085 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:15,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-21 22:18:15,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:18:15,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:15,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-21 22:18:15,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 71 proven. 36 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-11-21 22:18:16,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:16,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:16,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879992684] [2023-11-21 22:18:16,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:18:16,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053674611] [2023-11-21 22:18:16,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053674611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:16,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:16,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-21 22:18:16,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35508076] [2023-11-21 22:18:16,908 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:16,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:18:16,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:16,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:18:16,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:18:16,910 INFO L87 Difference]: Start difference. First operand 252 states and 351 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2023-11-21 22:18:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:17,878 INFO L93 Difference]: Finished difference Result 264 states and 361 transitions. [2023-11-21 22:18:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-21 22:18:17,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 112 [2023-11-21 22:18:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:17,882 INFO L225 Difference]: With dead ends: 264 [2023-11-21 22:18:17,882 INFO L226 Difference]: Without dead ends: 262 [2023-11-21 22:18:17,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:18:17,884 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:17,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 447 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:18:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-21 22:18:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 231. [2023-11-21 22:18:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 124 states have internal predecessors, (140), 89 states have call successors, (89), 19 states have call predecessors, (89), 19 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-21 22:18:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 316 transitions. [2023-11-21 22:18:18,026 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 316 transitions. Word has length 112 [2023-11-21 22:18:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:18,027 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 316 transitions. [2023-11-21 22:18:18,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2023-11-21 22:18:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 316 transitions. [2023-11-21 22:18:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-21 22:18:18,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:18,030 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:18,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:18,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 22:18:18,242 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:18,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:18,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1506060358, now seen corresponding path program 5 times [2023-11-21 22:18:18,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:18,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314186217] [2023-11-21 22:18:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:18,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:18,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:18:18,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431806656] [2023-11-21 22:18:18,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:18:18,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:18,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:18,265 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:18,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-21 22:18:18,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-21 22:18:18,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:18,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-21 22:18:18,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 79 proven. 74 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2023-11-21 22:18:19,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:22,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:22,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314186217] [2023-11-21 22:18:22,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:18:22,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431806656] [2023-11-21 22:18:22,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431806656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:22,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:18:22,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-21 22:18:22,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124970473] [2023-11-21 22:18:22,431 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:22,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 22:18:22,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 22:18:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=352, Unknown=1, NotChecked=0, Total=420 [2023-11-21 22:18:22,433 INFO L87 Difference]: Start difference. First operand 231 states and 316 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) [2023-11-21 22:18:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:24,571 INFO L93 Difference]: Finished difference Result 265 states and 362 transitions. [2023-11-21 22:18:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-21 22:18:24,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) Word has length 115 [2023-11-21 22:18:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:24,573 INFO L225 Difference]: With dead ends: 265 [2023-11-21 22:18:24,574 INFO L226 Difference]: Without dead ends: 263 [2023-11-21 22:18:24,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=124, Invalid=687, Unknown=1, NotChecked=0, Total=812 [2023-11-21 22:18:24,575 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 42 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:24,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 424 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-21 22:18:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-11-21 22:18:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2023-11-21 22:18:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 137 states have (on average 1.145985401459854) internal successors, (157), 139 states have internal predecessors, (157), 101 states have call successors, (101), 21 states have call predecessors, (101), 21 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-21 22:18:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 357 transitions. [2023-11-21 22:18:24,745 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 357 transitions. Word has length 115 [2023-11-21 22:18:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:24,745 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 357 transitions. [2023-11-21 22:18:24,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 9 states have call predecessors, (21), 6 states have call successors, (21) [2023-11-21 22:18:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 357 transitions. [2023-11-21 22:18:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-21 22:18:24,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:24,748 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:24,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-21 22:18:24,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-21 22:18:24,954 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:24,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:24,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1538893617, now seen corresponding path program 2 times [2023-11-21 22:18:24,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:24,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632380744] [2023-11-21 22:18:24,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:24,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:24,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:18:24,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271314592] [2023-11-21 22:18:24,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:18:24,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:24,971 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:24,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-21 22:18:25,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:18:25,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:25,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-21 22:18:25,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2023-11-21 22:18:26,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2023-11-21 22:18:27,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632380744] [2023-11-21 22:18:27,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:18:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271314592] [2023-11-21 22:18:27,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271314592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:27,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:18:27,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2023-11-21 22:18:27,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803574010] [2023-11-21 22:18:27,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:27,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-21 22:18:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-21 22:18:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:18:27,035 INFO L87 Difference]: Start difference. First operand 260 states and 357 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2023-11-21 22:18:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:18:36,332 INFO L93 Difference]: Finished difference Result 400 states and 581 transitions. [2023-11-21 22:18:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-21 22:18:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) Word has length 121 [2023-11-21 22:18:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:18:36,336 INFO L225 Difference]: With dead ends: 400 [2023-11-21 22:18:36,337 INFO L226 Difference]: Without dead ends: 398 [2023-11-21 22:18:36,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=782, Invalid=3378, Unknown=0, NotChecked=0, Total=4160 [2023-11-21 22:18:36,340 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 146 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:18:36,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 761 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-21 22:18:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-21 22:18:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 375. [2023-11-21 22:18:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 188 states have (on average 1.1861702127659575) internal successors, (223), 191 states have internal predecessors, (223), 162 states have call successors, (162), 24 states have call predecessors, (162), 24 states have return successors, (160), 159 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-21 22:18:36,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 545 transitions. [2023-11-21 22:18:36,648 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 545 transitions. Word has length 121 [2023-11-21 22:18:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:18:36,648 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 545 transitions. [2023-11-21 22:18:36,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 13 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2023-11-21 22:18:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 545 transitions. [2023-11-21 22:18:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-21 22:18:36,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:18:36,651 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2023-11-21 22:18:36,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:36,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:36,864 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:18:36,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:36,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1934717904, now seen corresponding path program 2 times [2023-11-21 22:18:36,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:36,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826707354] [2023-11-21 22:18:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:36,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:36,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:18:36,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108807897] [2023-11-21 22:18:36,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:18:36,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:36,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:36,877 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:36,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb959389-ab5f-45e2-b3ae-dcab68fa34a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-21 22:18:36,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:18:36,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:36,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 22:18:36,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 77 proven. 53 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2023-11-21 22:18:37,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 86 proven. 7 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2023-11-21 22:18:38,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:38,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826707354] [2023-11-21 22:18:38,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:18:38,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108807897] [2023-11-21 22:18:38,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108807897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:38,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:18:38,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 24 [2023-11-21 22:18:38,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009038453] [2023-11-21 22:18:38,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:38,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-21 22:18:38,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:38,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-21 22:18:38,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:18:38,013 INFO L87 Difference]: Start difference. First operand 375 states and 545 transitions. Second operand has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34)