./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/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_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/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_89d23d63-1580-46c2-ba27-d05ad230b98a/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 b4ff78c7a05ff12ed3c4b9587e1e659860187fd62fb9ac015e2b63b391c38f88 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:26:02,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:26:02,928 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:26:02,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:26:02,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:26:02,962 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:26:02,963 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:26:02,964 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:26:02,965 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:26:02,966 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:26:02,966 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:26:02,967 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:26:02,968 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:26:02,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:26:02,969 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:26:02,970 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:26:02,971 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:26:02,971 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:26:02,972 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:26:02,972 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:26:02,973 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:26:02,974 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:26:02,975 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:26:02,975 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:26:02,976 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:26:02,976 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:26:02,977 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:26:02,978 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:26:02,978 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:26:02,979 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:26:02,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:26:02,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:26:02,981 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:26:02,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:26:02,982 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:26:02,982 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:26:02,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:26:02,983 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:26:02,984 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:26:02,984 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:26:02,985 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:26:02,985 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:26:02,985 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_89d23d63-1580-46c2-ba27-d05ad230b98a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4ff78c7a05ff12ed3c4b9587e1e659860187fd62fb9ac015e2b63b391c38f88 [2023-11-21 22:26:03,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:26:03,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:26:03,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:26:03,278 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:26:03,279 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:26:03,280 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2023-11-21 22:26:06,549 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:26:06,736 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:26:06,736 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2023-11-21 22:26:06,751 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/data/70be22a52/a4707d481ad04857b3637be7b2a12e3c/FLAG08fb22282 [2023-11-21 22:26:06,767 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/data/70be22a52/a4707d481ad04857b3637be7b2a12e3c [2023-11-21 22:26:06,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:26:06,775 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:26:06,777 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:26:06,777 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:26:06,785 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:26:06,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:26:06" (1/1) ... [2023-11-21 22:26:06,787 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1cf7c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:06, skipping insertion in model container [2023-11-21 22:26:06,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:26:06" (1/1) ... [2023-11-21 22:26:06,810 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:26:06,959 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_89d23d63-1580-46c2-ba27-d05ad230b98a/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c[1175,1188] [2023-11-21 22:26:06,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:26:06,988 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:26:07,002 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_89d23d63-1580-46c2-ba27-d05ad230b98a/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c[1175,1188] [2023-11-21 22:26:07,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:26:07,024 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:26:07,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07 WrapperNode [2023-11-21 22:26:07,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:26:07,027 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:26:07,027 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:26:07,027 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:26:07,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,043 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,077 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2023-11-21 22:26:07,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:26:07,079 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:26:07,079 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:26:07,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:26:07,093 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,109 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,120 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:26:07,129 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,130 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,133 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,136 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,147 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,148 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,149 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:26:07,150 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:26:07,151 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:26:07,151 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:26:07,152 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:26:07,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:07,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:26:07,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:26:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:26:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:26:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:26:07,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:26:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 22:26:07,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 22:26:07,321 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:26:07,323 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:26:07,473 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:26:07,545 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:26:07,545 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 22:26:07,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:07 BoogieIcfgContainer [2023-11-21 22:26:07,547 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:26:07,550 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:26:07,550 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:26:07,554 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:26:07,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:26:06" (1/3) ... [2023-11-21 22:26:07,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b3a8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:07, skipping insertion in model container [2023-11-21 22:26:07,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07" (2/3) ... [2023-11-21 22:26:07,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b3a8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:07, skipping insertion in model container [2023-11-21 22:26:07,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:07" (3/3) ... [2023-11-21 22:26:07,557 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.c [2023-11-21 22:26:07,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:26:07,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:26:07,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:26:07,635 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;@3429f824, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:26:07,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:26:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:26:07,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:07,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:26:07,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:07,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1628036165, now seen corresponding path program 1 times [2023-11-21 22:26:07,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:07,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424778572] [2023-11-21 22:26:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:07,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:07,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:07,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424778572] [2023-11-21 22:26:07,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-21 22:26:07,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643922975] [2023-11-21 22:26:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:07,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:07,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:07,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:07,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:26:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:07,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-21 22:26:07,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:07,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:26:07,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643922975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:07,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:07,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:26:07,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070400228] [2023-11-21 22:26:07,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:07,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 22:26:07,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:07,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 22:26:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:26:07,957 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:07,987 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2023-11-21 22:26:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 22:26:07,990 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-21 22:26:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:07,997 INFO L225 Difference]: With dead ends: 27 [2023-11-21 22:26:07,997 INFO L226 Difference]: Without dead ends: 12 [2023-11-21 22:26:08,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 22:26:08,004 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:08,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:26:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-21 22:26:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-21 22:26:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:26:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-11-21 22:26:08,043 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2023-11-21 22:26:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:08,044 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-11-21 22:26:08,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-11-21 22:26:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:26:08,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:08,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:08,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:08,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 22:26:08,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:08,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash 464117524, now seen corresponding path program 1 times [2023-11-21 22:26:08,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:08,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748914032] [2023-11-21 22:26:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:08,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:08,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:08,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748914032] [2023-11-21 22:26:08,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-21 22:26:08,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860503499] [2023-11-21 22:26:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:08,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:08,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:08,322 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:08,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:26:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:08,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:26:08,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:08,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:26:08,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860503499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:08,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:08,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:26:08,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016678104] [2023-11-21 22:26:08,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:08,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:26:08,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:08,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:26:08,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:26:08,444 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:08,474 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-11-21 22:26:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:26:08,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 22:26:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:08,476 INFO L225 Difference]: With dead ends: 21 [2023-11-21 22:26:08,476 INFO L226 Difference]: Without dead ends: 14 [2023-11-21 22:26:08,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:26:08,478 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:08,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:26:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-21 22:26:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-21 22:26:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:26:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-21 22:26:08,484 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2023-11-21 22:26:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:08,484 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-21 22:26:08,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-21 22:26:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:26:08,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:08,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:08,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:08,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:08,686 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:08,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash 465904984, now seen corresponding path program 1 times [2023-11-21 22:26:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:08,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019581146] [2023-11-21 22:26:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:08,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:26:08,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508710835] [2023-11-21 22:26:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:08,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:08,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:08,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:26:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:08,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:26:08,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:08,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:26:08,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:08,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019581146] [2023-11-21 22:26:08,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:26:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508710835] [2023-11-21 22:26:08,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508710835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:08,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:08,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:26:08,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865417556] [2023-11-21 22:26:08,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:08,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:08,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:08,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:08,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:08,875 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:08,946 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-11-21 22:26:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:26:08,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 22:26:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:08,949 INFO L225 Difference]: With dead ends: 23 [2023-11-21 22:26:08,949 INFO L226 Difference]: Without dead ends: 21 [2023-11-21 22:26:08,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 22:26:08,954 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:08,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:26:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-21 22:26:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-11-21 22:26:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-21 22:26:08,974 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 7 [2023-11-21 22:26:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:08,975 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-21 22:26:08,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-21 22:26:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 22:26:08,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:08,977 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:09,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:09,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:09,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:09,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:09,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1433201903, now seen corresponding path program 1 times [2023-11-21 22:26:09,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:09,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110339685] [2023-11-21 22:26:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:09,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:09,213 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:26:09,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192571631] [2023-11-21 22:26:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:09,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:09,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:09,217 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:09,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:26:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:09,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 22:26:09,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:09,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:26:09,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:09,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110339685] [2023-11-21 22:26:09,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:26:09,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192571631] [2023-11-21 22:26:09,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192571631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:09,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:09,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:26:09,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736928597] [2023-11-21 22:26:09,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:09,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:09,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:09,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:09,310 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:26:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:09,323 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-11-21 22:26:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:09,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-21 22:26:09,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:09,325 INFO L225 Difference]: With dead ends: 27 [2023-11-21 22:26:09,325 INFO L226 Difference]: Without dead ends: 20 [2023-11-21 22:26:09,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:09,327 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:09,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:26:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-21 22:26:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-21 22:26:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-21 22:26:09,333 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2023-11-21 22:26:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:09,334 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-21 22:26:09,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:26:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-21 22:26:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:26:09,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:09,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:09,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:09,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:09,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:09,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:09,557 INFO L85 PathProgramCache]: Analyzing trace with hash -516596709, now seen corresponding path program 1 times [2023-11-21 22:26:09,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:09,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421295997] [2023-11-21 22:26:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:09,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:09,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:26:09,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580999097] [2023-11-21 22:26:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:09,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:09,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:09,600 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:09,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:26:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:09,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:26:09,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:09,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:26:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:09,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:09,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421295997] [2023-11-21 22:26:09,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:26:09,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580999097] [2023-11-21 22:26:09,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580999097] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:26:09,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:26:09,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-21 22:26:09,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686748652] [2023-11-21 22:26:09,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:26:09,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:26:09,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:09,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:26:09,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:26:09,804 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:09,918 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-11-21 22:26:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:26:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-21 22:26:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:09,919 INFO L225 Difference]: With dead ends: 51 [2023-11-21 22:26:09,920 INFO L226 Difference]: Without dead ends: 44 [2023-11-21 22:26:09,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:26:09,922 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:09,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-21 22:26:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2023-11-21 22:26:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:26:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-11-21 22:26:09,931 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2023-11-21 22:26:09,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:09,932 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-11-21 22:26:09,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:09,932 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-11-21 22:26:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:26:09,935 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:09,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:09,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:10,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:10,145 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:10,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash -514809249, now seen corresponding path program 1 times [2023-11-21 22:26:10,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:10,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131790082] [2023-11-21 22:26:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:10,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:26:10,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547649440] [2023-11-21 22:26:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:10,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:10,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:10,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:10,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:26:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:10,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-21 22:26:10,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:12,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:26:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:20,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:20,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131790082] [2023-11-21 22:26:20,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:26:20,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547649440] [2023-11-21 22:26:20,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547649440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:26:20,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:26:20,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-21 22:26:20,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564844733] [2023-11-21 22:26:20,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:26:20,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:26:20,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:26:20,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:26:20,813 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:22,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-21 22:26:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:25,917 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-11-21 22:26:25,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:26:25,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-21 22:26:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:25,926 INFO L225 Difference]: With dead ends: 56 [2023-11-21 22:26:25,926 INFO L226 Difference]: Without dead ends: 50 [2023-11-21 22:26:25,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:26:25,932 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:25,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 57 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-21 22:26:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-21 22:26:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-11-21 22:26:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:26:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-11-21 22:26:25,965 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 15 [2023-11-21 22:26:25,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:25,966 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-11-21 22:26:25,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-11-21 22:26:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 22:26:25,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:25,968 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:25,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:26,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:26,169 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:26,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:26,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1676822710, now seen corresponding path program 1 times [2023-11-21 22:26:26,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:26,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151221192] [2023-11-21 22:26:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:26,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:26,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:26:26,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942590017] [2023-11-21 22:26:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:26,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:26,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:26,201 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:26,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:26:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:26,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:26:26,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:26:26,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:26:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:26:26,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:26,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151221192] [2023-11-21 22:26:26,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:26:26,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942590017] [2023-11-21 22:26:26,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942590017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:26:26,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:26:26,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2023-11-21 22:26:26,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516074497] [2023-11-21 22:26:26,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:26:26,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:26:26,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:26:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:26:26,540 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:26:26,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:26,658 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2023-11-21 22:26:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:26:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2023-11-21 22:26:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:26,666 INFO L225 Difference]: With dead ends: 53 [2023-11-21 22:26:26,667 INFO L226 Difference]: Without dead ends: 43 [2023-11-21 22:26:26,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:26:26,669 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:26,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 42 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-21 22:26:26,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-21 22:26:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.064516129032258) internal successors, (33), 33 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:26:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2023-11-21 22:26:26,693 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 21 [2023-11-21 22:26:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:26,694 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2023-11-21 22:26:26,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-21 22:26:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2023-11-21 22:26:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-21 22:26:26,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:26,696 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-21 22:26:26,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:26,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:26,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:26,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1595930320, now seen corresponding path program 2 times [2023-11-21 22:26:26,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:26,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146601053] [2023-11-21 22:26:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:26,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:26,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:26:26,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265883812] [2023-11-21 22:26:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:26:26,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:26,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:26,935 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:26,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:26:27,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:26:27,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:26:27,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:26:27,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:27,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:26:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 22:26:27,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:27,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146601053] [2023-11-21 22:26:27,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:26:27,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265883812] [2023-11-21 22:26:27,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265883812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:26:27,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:26:27,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-21 22:26:27,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357639009] [2023-11-21 22:26:27,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:26:27,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:26:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:26:27,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:26:27,256 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-21 22:26:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:27,484 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2023-11-21 22:26:27,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 22:26:27,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39 [2023-11-21 22:26:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:27,487 INFO L225 Difference]: With dead ends: 103 [2023-11-21 22:26:27,487 INFO L226 Difference]: Without dead ends: 96 [2023-11-21 22:26:27,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:26:27,489 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:27,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 73 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-21 22:26:27,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2023-11-21 22:26:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.109375) internal successors, (71), 65 states have internal predecessors, (71), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-21 22:26:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2023-11-21 22:26:27,506 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 39 [2023-11-21 22:26:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:27,506 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2023-11-21 22:26:27,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-21 22:26:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2023-11-21 22:26:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-21 22:26:27,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:27,508 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1] [2023-11-21 22:26:27,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:27,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:27,722 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:27,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1594142860, now seen corresponding path program 2 times [2023-11-21 22:26:27,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:27,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415035116] [2023-11-21 22:26:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:27,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:27,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:26:27,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345399475] [2023-11-21 22:26:27,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:26:27,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:27,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:27,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:27,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:26:27,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:26:27,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:26:27,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-21 22:26:27,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:26:29,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:26:37,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:37,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415035116] [2023-11-21 22:26:37,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:26:37,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345399475] [2023-11-21 22:26:37,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345399475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:26:37,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:26:37,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-21 22:26:37,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555663554] [2023-11-21 22:26:37,940 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 22:26:37,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:26:37,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:26:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=270, Unknown=1, NotChecked=0, Total=342 [2023-11-21 22:26:37,943 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:26:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:38,648 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2023-11-21 22:26:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:26:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2023-11-21 22:26:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:38,653 INFO L225 Difference]: With dead ends: 88 [2023-11-21 22:26:38,653 INFO L226 Difference]: Without dead ends: 86 [2023-11-21 22:26:38,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=84, Invalid=335, Unknown=1, NotChecked=0, Total=420 [2023-11-21 22:26:38,654 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:38,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 161 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:26:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-21 22:26:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-21 22:26:38,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.09375) internal successors, (70), 65 states have internal predecessors, (70), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-21 22:26:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2023-11-21 22:26:38,680 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 39 [2023-11-21 22:26:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:38,683 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2023-11-21 22:26:38,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:26:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2023-11-21 22:26:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 22:26:38,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:38,693 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1] [2023-11-21 22:26:38,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:38,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:38,901 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:38,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1111027835, now seen corresponding path program 3 times [2023-11-21 22:26:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:38,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052897304] [2023-11-21 22:26:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:38,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:38,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:26:38,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381493521] [2023-11-21 22:26:38,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:26:38,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:38,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:38,927 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:38,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89d23d63-1580-46c2-ba27-d05ad230b98a/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:26:39,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-21 22:26:39,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:26:39,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-21 22:26:39,244 INFO L285 TraceCheckSpWp]: Computing forward predicates...