./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu --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 a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:55,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:55,874 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:55:55,886 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:55,887 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:55,926 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:55,927 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:55,928 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:55,930 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:55,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:55,937 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:55,937 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:55,938 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:55,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:55,940 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:55:55,941 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:55,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:55,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:55,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:55,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:55:55,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:55,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:55:55,945 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:55,945 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:55,946 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:55,947 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:55,947 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:55,948 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:55,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:55,949 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:55,950 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:55,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:55:55,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:55,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:55,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:55,952 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:55:55,953 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:55,953 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:55,953 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:55,954 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_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 [2023-11-19 07:55:56,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:56,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:56,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:56,307 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:56,308 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:56,309 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2023-11-19 07:55:59,482 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:59,708 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:59,709 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2023-11-19 07:55:59,716 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/data/fc7cc795d/55a6a87e9d14476d8ef4cde9614d053f/FLAGaa57c570f [2023-11-19 07:55:59,730 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/data/fc7cc795d/55a6a87e9d14476d8ef4cde9614d053f [2023-11-19 07:55:59,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:59,734 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:59,736 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:59,736 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:59,741 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:59,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:59" (1/1) ... [2023-11-19 07:55:59,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e7ca46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:59, skipping insertion in model container [2023-11-19 07:55:59,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:59" (1/1) ... [2023-11-19 07:55:59,765 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:59,994 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_614c96fe-355f-4eae-9800-1463b4491c07/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2023-11-19 07:56:00,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:00,022 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:56:00,036 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_614c96fe-355f-4eae-9800-1463b4491c07/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2023-11-19 07:56:00,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:56:00,063 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:56:00,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00 WrapperNode [2023-11-19 07:56:00,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:56:00,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:00,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:56:00,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:56:00,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,081 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,101 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2023-11-19 07:56:00,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:56:00,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:56:00,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:56:00,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:56:00,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,112 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,117 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,120 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,121 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,122 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,124 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:56:00,125 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:56:00,125 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:56:00,125 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:56:00,126 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (1/1) ... [2023-11-19 07:56:00,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:56:00,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:00,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:56:00,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:56:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:56:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:56:00,210 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:56:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:56:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:56:00,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:56:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:56:00,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:56:00,267 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:56:00,269 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:56:00,444 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:56:00,453 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:56:00,453 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:56:00,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:00 BoogieIcfgContainer [2023-11-19 07:56:00,457 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:56:00,460 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:56:00,460 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:56:00,464 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:56:00,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:59" (1/3) ... [2023-11-19 07:56:00,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3dcb11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:00, skipping insertion in model container [2023-11-19 07:56:00,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:00" (2/3) ... [2023-11-19 07:56:00,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3dcb11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:00, skipping insertion in model container [2023-11-19 07:56:00,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:00" (3/3) ... [2023-11-19 07:56:00,467 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2023-11-19 07:56:00,488 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:56:00,488 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:56:00,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:56:00,549 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;@5b30b2c9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:56:00,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:56:00,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 07:56:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:56:00,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:00,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:00,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:00,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2023-11-19 07:56:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:00,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291344783] [2023-11-19 07:56:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:00,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:00,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:56:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:00,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:56:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:00,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:56:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:56:00,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:00,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291344783] [2023-11-19 07:56:00,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291344783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:00,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:00,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:56:00,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211910500] [2023-11-19 07:56:00,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:00,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:56:00,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:00,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:56:00,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:56:00,901 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:56:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:00,925 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2023-11-19 07:56:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:56:00,927 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-19 07:56:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:00,935 INFO L225 Difference]: With dead ends: 63 [2023-11-19 07:56:00,935 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 07:56:00,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:56:00,942 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:00,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 07:56:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-19 07:56:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:56:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-11-19 07:56:00,984 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2023-11-19 07:56:00,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:00,984 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-11-19 07:56:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:56:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-11-19 07:56:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:56:00,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:00,987 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:00,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:56:00,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:00,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:00,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2023-11-19 07:56:00,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:00,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212860963] [2023-11-19 07:56:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:00,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:56:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:56:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:56:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:56:01,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:01,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212860963] [2023-11-19 07:56:01,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212860963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:01,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:01,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:56:01,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054646219] [2023-11-19 07:56:01,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:01,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:01,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:01,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:01,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:01,254 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:56:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:01,322 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-11-19 07:56:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:01,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-11-19 07:56:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:01,324 INFO L225 Difference]: With dead ends: 42 [2023-11-19 07:56:01,324 INFO L226 Difference]: Without dead ends: 40 [2023-11-19 07:56:01,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:01,326 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:01,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 125 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-19 07:56:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-11-19 07:56:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:56:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-11-19 07:56:01,350 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2023-11-19 07:56:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:01,351 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-11-19 07:56:01,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:56:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-11-19 07:56:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 07:56:01,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:01,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:01,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:56:01,355 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:01,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2023-11-19 07:56:01,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:01,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329086158] [2023-11-19 07:56:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:01,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:56:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-19 07:56:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:56:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-19 07:56:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:56:01,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329086158] [2023-11-19 07:56:01,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329086158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:01,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:01,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:56:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606974107] [2023-11-19 07:56:01,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:01,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:01,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:01,558 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:56:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:01,699 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-11-19 07:56:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:01,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-11-19 07:56:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:01,707 INFO L225 Difference]: With dead ends: 46 [2023-11-19 07:56:01,708 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 07:56:01,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:01,710 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:01,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 121 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 07:56:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-11-19 07:56:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:56:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-11-19 07:56:01,726 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2023-11-19 07:56:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:01,727 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-11-19 07:56:01,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:56:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-11-19 07:56:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 07:56:01,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:01,729 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:01,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:56:01,730 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:01,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:01,731 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2023-11-19 07:56:01,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:01,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247005725] [2023-11-19 07:56:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:01,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:01,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:01,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472487183] [2023-11-19 07:56:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:01,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:01,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:01,755 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:01,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:56:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:01,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:56:01,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:56:02,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:56:02,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:02,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247005725] [2023-11-19 07:56:02,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:02,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472487183] [2023-11-19 07:56:02,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472487183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:02,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:02,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:56:02,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241294906] [2023-11-19 07:56:02,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:02,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:02,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:02,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:02,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:02,059 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:56:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:02,194 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2023-11-19 07:56:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:56:02,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2023-11-19 07:56:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:02,199 INFO L225 Difference]: With dead ends: 65 [2023-11-19 07:56:02,199 INFO L226 Difference]: Without dead ends: 51 [2023-11-19 07:56:02,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:02,210 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:02,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 123 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:02,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-19 07:56:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-19 07:56:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-19 07:56:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-11-19 07:56:02,252 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 34 [2023-11-19 07:56:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:02,253 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-11-19 07:56:02,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:56:02,254 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-11-19 07:56:02,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 07:56:02,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:02,259 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:02,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:02,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:02,472 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:02,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:02,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2023-11-19 07:56:02,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:02,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106516405] [2023-11-19 07:56:02,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:02,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:02,490 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:02,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251126095] [2023-11-19 07:56:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:02,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:02,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:02,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:02,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:56:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:02,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:56:02,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 07:56:02,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:56:02,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106516405] [2023-11-19 07:56:02,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:02,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251126095] [2023-11-19 07:56:02,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251126095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:02,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:02,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:56:02,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997718166] [2023-11-19 07:56:02,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:02,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:02,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:02,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:02,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:02,688 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:56:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:02,791 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2023-11-19 07:56:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:56:02,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2023-11-19 07:56:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:02,798 INFO L225 Difference]: With dead ends: 64 [2023-11-19 07:56:02,801 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 07:56:02,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:02,803 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:02,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 107 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 07:56:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-11-19 07:56:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 07:56:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-11-19 07:56:02,831 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 41 [2023-11-19 07:56:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:02,852 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-11-19 07:56:02,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:56:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-11-19 07:56:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 07:56:02,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:02,854 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:02,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:56:03,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:03,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:03,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:03,068 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2023-11-19 07:56:03,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:03,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776649351] [2023-11-19 07:56:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:03,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:03,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:03,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31042685] [2023-11-19 07:56:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:03,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:03,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:03,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:03,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:56:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:03,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:56:03,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 07:56:03,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-19 07:56:03,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:03,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776649351] [2023-11-19 07:56:03,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:03,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31042685] [2023-11-19 07:56:03,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31042685] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:03,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:56:03,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-19 07:56:03,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251713502] [2023-11-19 07:56:03,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:03,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:03,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:03,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:03,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:56:03,429 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:56:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:03,520 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2023-11-19 07:56:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:56:03,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2023-11-19 07:56:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:03,524 INFO L225 Difference]: With dead ends: 68 [2023-11-19 07:56:03,524 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 07:56:03,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:56:03,526 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:03,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 116 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 07:56:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2023-11-19 07:56:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-19 07:56:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2023-11-19 07:56:03,548 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 51 [2023-11-19 07:56:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:03,548 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2023-11-19 07:56:03,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:56:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2023-11-19 07:56:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-19 07:56:03,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:03,551 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:03,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:03,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:03,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:03,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:03,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2023-11-19 07:56:03,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:03,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987100942] [2023-11-19 07:56:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:03,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:03,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:03,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310351727] [2023-11-19 07:56:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:03,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:03,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:03,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:03,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:56:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:03,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 07:56:03,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-19 07:56:04,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-19 07:56:08,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:08,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987100942] [2023-11-19 07:56:08,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:08,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310351727] [2023-11-19 07:56:08,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310351727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:08,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:56:08,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-11-19 07:56:08,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800174237] [2023-11-19 07:56:08,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:08,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:56:08,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:56:08,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:56:08,156 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-19 07:56:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:10,766 INFO L93 Difference]: Finished difference Result 161 states and 224 transitions. [2023-11-19 07:56:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:56:10,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 71 [2023-11-19 07:56:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:10,772 INFO L225 Difference]: With dead ends: 161 [2023-11-19 07:56:10,772 INFO L226 Difference]: Without dead ends: 138 [2023-11-19 07:56:10,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2023-11-19 07:56:10,778 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:10,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 341 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 07:56:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-19 07:56:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 102. [2023-11-19 07:56:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 07:56:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2023-11-19 07:56:10,842 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 71 [2023-11-19 07:56:10,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:10,843 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2023-11-19 07:56:10,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-19 07:56:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2023-11-19 07:56:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-19 07:56:10,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:10,846 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:10,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:11,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:11,060 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:11,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2023-11-19 07:56:11,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:11,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365711825] [2023-11-19 07:56:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:11,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:11,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:11,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665875030] [2023-11-19 07:56:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:11,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:11,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:11,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:11,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:56:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:11,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:56:11,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2023-11-19 07:56:11,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:11,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:11,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365711825] [2023-11-19 07:56:11,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:11,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665875030] [2023-11-19 07:56:11,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665875030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:56:11,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:56:11,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-19 07:56:11,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015412375] [2023-11-19 07:56:11,691 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:11,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:56:11,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:11,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:56:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:56:11,693 INFO L87 Difference]: Start difference. First operand 102 states and 129 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-19 07:56:12,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:12,235 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2023-11-19 07:56:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:56:12,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2023-11-19 07:56:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:12,241 INFO L225 Difference]: With dead ends: 118 [2023-11-19 07:56:12,241 INFO L226 Difference]: Without dead ends: 116 [2023-11-19 07:56:12,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:56:12,244 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 35 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:12,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 374 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:56:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-19 07:56:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2023-11-19 07:56:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.203125) internal successors, (77), 67 states have internal predecessors, (77), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-19 07:56:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2023-11-19 07:56:12,347 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 82 [2023-11-19 07:56:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:12,348 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2023-11-19 07:56:12,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-19 07:56:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2023-11-19 07:56:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-19 07:56:12,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:12,350 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:12,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:12,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:56:12,564 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:12,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1888027627, now seen corresponding path program 2 times [2023-11-19 07:56:12,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:12,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246744105] [2023-11-19 07:56:12,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:12,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:12,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:12,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379722337] [2023-11-19 07:56:12,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:56:12,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:12,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:12,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:12,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:56:12,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:56:12,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:12,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:56:12,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-11-19 07:56:12,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-11-19 07:56:12,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:12,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246744105] [2023-11-19 07:56:12,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:12,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379722337] [2023-11-19 07:56:12,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379722337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:12,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:56:12,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-11-19 07:56:12,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323861180] [2023-11-19 07:56:12,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:12,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:12,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:12,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:12,811 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-19 07:56:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:12,953 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2023-11-19 07:56:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:56:12,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2023-11-19 07:56:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:12,956 INFO L225 Difference]: With dead ends: 133 [2023-11-19 07:56:12,956 INFO L226 Difference]: Without dead ends: 111 [2023-11-19 07:56:12,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:12,959 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:12,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 112 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:56:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-19 07:56:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-11-19 07:56:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 66 states have (on average 1.196969696969697) internal successors, (79), 69 states have internal predecessors, (79), 33 states have call successors, (33), 11 states have call predecessors, (33), 11 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-19 07:56:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2023-11-19 07:56:13,023 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 84 [2023-11-19 07:56:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:13,026 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2023-11-19 07:56:13,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-19 07:56:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2023-11-19 07:56:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 07:56:13,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:13,034 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:13,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:13,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:56:13,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:13,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:13,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1729716470, now seen corresponding path program 1 times [2023-11-19 07:56:13,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:13,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896684335] [2023-11-19 07:56:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:13,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:13,267 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588946402] [2023-11-19 07:56:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:13,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:13,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:13,268 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:13,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:56:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:13,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:56:13,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-11-19 07:56:13,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-11-19 07:56:14,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896684335] [2023-11-19 07:56:14,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588946402] [2023-11-19 07:56:14,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588946402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:14,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:56:14,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-11-19 07:56:14,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059133753] [2023-11-19 07:56:14,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:56:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:56:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:56:14,179 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2023-11-19 07:56:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:14,672 INFO L93 Difference]: Finished difference Result 126 states and 164 transitions. [2023-11-19 07:56:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:56:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) Word has length 87 [2023-11-19 07:56:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:14,680 INFO L225 Difference]: With dead ends: 126 [2023-11-19 07:56:14,680 INFO L226 Difference]: Without dead ends: 109 [2023-11-19 07:56:14,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:56:14,682 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 27 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:14,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 405 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:56:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-19 07:56:14,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2023-11-19 07:56:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 07:56:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 130 transitions. [2023-11-19 07:56:14,734 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 130 transitions. Word has length 87 [2023-11-19 07:56:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:14,734 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 130 transitions. [2023-11-19 07:56:14,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2023-11-19 07:56:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 130 transitions. [2023-11-19 07:56:14,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 07:56:14,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:14,736 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:14,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:14,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:56:14,956 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:14,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:14,957 INFO L85 PathProgramCache]: Analyzing trace with hash -219918921, now seen corresponding path program 1 times [2023-11-19 07:56:14,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:14,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711012210] [2023-11-19 07:56:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:14,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:14,969 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:14,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122845328] [2023-11-19 07:56:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:14,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:14,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:14,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:14,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:56:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:15,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:56:15,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-19 07:56:15,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:56:15,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:15,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711012210] [2023-11-19 07:56:15,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:15,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122845328] [2023-11-19 07:56:15,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122845328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:15,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:15,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:56:15,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539339301] [2023-11-19 07:56:15,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:15,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:15,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:15,108 INFO L87 Difference]: Start difference. First operand 102 states and 130 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-19 07:56:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:15,195 INFO L93 Difference]: Finished difference Result 115 states and 143 transitions. [2023-11-19 07:56:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:56:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2023-11-19 07:56:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:15,198 INFO L225 Difference]: With dead ends: 115 [2023-11-19 07:56:15,198 INFO L226 Difference]: Without dead ends: 103 [2023-11-19 07:56:15,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:15,200 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:15,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 113 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:56:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-19 07:56:15,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-19 07:56:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 64 states have internal predecessors, (72), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 07:56:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2023-11-19 07:56:15,268 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 91 [2023-11-19 07:56:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:15,268 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2023-11-19 07:56:15,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-19 07:56:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2023-11-19 07:56:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-19 07:56:15,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:15,270 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:56:15,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:15,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:15,492 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:15,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2023-11-19 07:56:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:15,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881356502] [2023-11-19 07:56:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:15,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:15,504 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:15,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290033568] [2023-11-19 07:56:15,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:56:15,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:15,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:15,506 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:15,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_614c96fe-355f-4eae-9800-1463b4491c07/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:56:15,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:56:15,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:56:15,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-19 07:56:15,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-11-19 07:56:16,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-11-19 07:56:33,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:33,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881356502] [2023-11-19 07:56:33,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:33,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290033568] [2023-11-19 07:56:33,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290033568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:33,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:56:33,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-11-19 07:56:33,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465798757] [2023-11-19 07:56:33,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:33,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:56:33,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:33,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:56:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:56:33,996 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 19 states have internal predecessors, (46), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-11-19 07:56:46,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 07:56:48,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 07:56:51,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []