./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.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_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/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_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/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_457e704e-f6a3-46d2-82ab-30c517b684ce/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 aeeaf8ddcaaadce0bb307be8d4cdfb2d28179f7ce6737573dce6c1be4b061da1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:24,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:24,701 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:55:24,706 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:24,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:24,730 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:24,731 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:24,732 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:24,733 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:24,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:24,735 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:24,736 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:24,737 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:24,738 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:24,738 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:55:24,739 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:24,740 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:24,741 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:24,741 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:24,742 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:55:24,743 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:24,744 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:55:24,745 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:24,745 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:24,746 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:24,747 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:24,747 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:24,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:24,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:24,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:24,750 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:24,750 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:55:24,751 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:24,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:24,751 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:24,752 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:55:24,752 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:24,753 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:24,753 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:24,753 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_457e704e-f6a3-46d2-82ab-30c517b684ce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aeeaf8ddcaaadce0bb307be8d4cdfb2d28179f7ce6737573dce6c1be4b061da1 [2023-11-19 07:55:25,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:25,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:25,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:25,162 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:25,164 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:25,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2023-11-19 07:55:28,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:28,814 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:28,815 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2023-11-19 07:55:28,850 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/data/75ab36cec/3db401a0ed334307832b2384b918188f/FLAGcc7e81e25 [2023-11-19 07:55:28,872 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/data/75ab36cec/3db401a0ed334307832b2384b918188f [2023-11-19 07:55:28,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:28,884 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:28,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:28,911 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:28,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:28,919 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:28" (1/1) ... [2023-11-19 07:55:28,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@319577a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:28, skipping insertion in model container [2023-11-19 07:55:28,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:28" (1/1) ... [2023-11-19 07:55:28,959 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:29,144 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_457e704e-f6a3-46d2-82ab-30c517b684ce/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c[520,533] [2023-11-19 07:55:29,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:29,189 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:29,206 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_457e704e-f6a3-46d2-82ab-30c517b684ce/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c[520,533] [2023-11-19 07:55:29,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:29,232 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:29,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29 WrapperNode [2023-11-19 07:55:29,233 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:29,234 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:29,234 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:29,235 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:29,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,257 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,282 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-11-19 07:55:29,284 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:29,289 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:29,290 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:29,290 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:29,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,313 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,313 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,316 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,322 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,327 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,328 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,330 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:29,334 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:29,335 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:29,335 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:29,336 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (1/1) ... [2023-11-19 07:55:29,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:29,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:29,378 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:29,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:29,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:55:29,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:55:29,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:29,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:55:29,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:55:29,512 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:29,515 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:29,768 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:29,776 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:29,777 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:55:29,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:29 BoogieIcfgContainer [2023-11-19 07:55:29,781 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:29,784 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:55:29,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:55:29,789 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:55:29,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:28" (1/3) ... [2023-11-19 07:55:29,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d41c5f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:29, skipping insertion in model container [2023-11-19 07:55:29,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:29" (2/3) ... [2023-11-19 07:55:29,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d41c5f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:29, skipping insertion in model container [2023-11-19 07:55:29,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:29" (3/3) ... [2023-11-19 07:55:29,793 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound100.c [2023-11-19 07:55:29,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:55:29,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:55:29,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:29,907 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;@2edb4c18, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:29,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:55:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 07:55:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 07:55:29,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:29,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:29,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:29,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:29,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2023-11-19 07:55:29,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:29,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896541350] [2023-11-19 07:55:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:29,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:30,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:30,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896541350] [2023-11-19 07:55:30,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896541350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:30,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:30,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:55:30,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659020754] [2023-11-19 07:55:30,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:30,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:55:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:55:30,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:55:30,187 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:30,225 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2023-11-19 07:55:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:55:30,228 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 07:55:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:30,237 INFO L225 Difference]: With dead ends: 40 [2023-11-19 07:55:30,237 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 07:55:30,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 07:55:30,247 INFO L413 NwaCegarLoop]: 27 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, 27 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 07:55:30,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:55:30,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 07:55:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 07:55:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:55:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2023-11-19 07:55:30,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2023-11-19 07:55:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:30,300 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2023-11-19 07:55:30,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,301 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2023-11-19 07:55:30,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:55:30,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:30,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:30,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:55:30,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:30,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:30,306 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2023-11-19 07:55:30,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:30,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440544574] [2023-11-19 07:55:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:30,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:30,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440544574] [2023-11-19 07:55:30,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440544574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:30,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:30,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:30,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679254354] [2023-11-19 07:55:30,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:30,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:30,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:30,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:30,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:30,469 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:30,496 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-11-19 07:55:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:30,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:55:30,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:30,498 INFO L225 Difference]: With dead ends: 28 [2023-11-19 07:55:30,499 INFO L226 Difference]: Without dead ends: 19 [2023-11-19 07:55:30,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:30,501 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:30,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:55:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-19 07:55:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-19 07:55:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:55:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-11-19 07:55:30,512 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2023-11-19 07:55:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:30,513 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-11-19 07:55:30,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-11-19 07:55:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:55:30,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:30,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:30,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:55:30,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:30,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:30,517 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2023-11-19 07:55:30,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:30,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796732231] [2023-11-19 07:55:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:30,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:30,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:30,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796732231] [2023-11-19 07:55:30,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796732231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:30,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:30,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:55:30,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356375824] [2023-11-19 07:55:30,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:30,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:30,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:30,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:30,795 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:30,884 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2023-11-19 07:55:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:30,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:55:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:30,887 INFO L225 Difference]: With dead ends: 32 [2023-11-19 07:55:30,887 INFO L226 Difference]: Without dead ends: 30 [2023-11-19 07:55:30,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:55:30,890 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:30,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 72 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:55:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-19 07:55:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-11-19 07:55:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:55:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-11-19 07:55:30,909 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2023-11-19 07:55:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:30,910 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-11-19 07:55:30,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-11-19 07:55:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 07:55:30,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:30,912 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:55:30,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:30,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2023-11-19 07:55:30,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:30,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851993780] [2023-11-19 07:55:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:30,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:30,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:30,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58444201] [2023-11-19 07:55:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:30,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:30,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:30,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:30,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:55:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:31,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:55:31,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:31,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851993780] [2023-11-19 07:55:31,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:31,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58444201] [2023-11-19 07:55:31,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58444201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:31,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:31,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:55:31,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362240523] [2023-11-19 07:55:31,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:31,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:31,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:31,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:31,160 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:55:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:31,234 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2023-11-19 07:55:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:31,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-19 07:55:31,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:31,237 INFO L225 Difference]: With dead ends: 36 [2023-11-19 07:55:31,237 INFO L226 Difference]: Without dead ends: 34 [2023-11-19 07:55:31,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 07:55:31,240 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:31,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:55:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-19 07:55:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-11-19 07:55:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 07:55:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-19 07:55:31,257 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 13 [2023-11-19 07:55:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:31,258 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-19 07:55:31,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:55:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-19 07:55:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:55:31,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:31,260 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:31,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:31,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:31,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:31,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:31,482 INFO L85 PathProgramCache]: Analyzing trace with hash 892115231, now seen corresponding path program 1 times [2023-11-19 07:55:31,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:31,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452666614] [2023-11-19 07:55:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:31,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:31,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:31,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577564624] [2023-11-19 07:55:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:31,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:31,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:31,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:31,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:55:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:31,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:55:31,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:55:31,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:31,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:31,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452666614] [2023-11-19 07:55:31,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:31,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577564624] [2023-11-19 07:55:31,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577564624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:31,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:31,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:55:31,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763213114] [2023-11-19 07:55:31,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:31,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:31,772 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:55:31,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:31,844 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-11-19 07:55:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:31,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-11-19 07:55:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:31,846 INFO L225 Difference]: With dead ends: 40 [2023-11-19 07:55:31,847 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 07:55:31,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 07:55:31,849 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:31,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 84 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:55:31,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 07:55:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-19 07:55:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:55:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-19 07:55:31,877 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 18 [2023-11-19 07:55:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:31,878 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-19 07:55:31,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:55:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-19 07:55:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 07:55:31,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:31,893 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:31,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:32,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:32,117 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:32,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:32,118 INFO L85 PathProgramCache]: Analyzing trace with hash 259746456, now seen corresponding path program 1 times [2023-11-19 07:55:32,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:32,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982121873] [2023-11-19 07:55:32,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:32,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:32,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:32,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741994235] [2023-11-19 07:55:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:32,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:32,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:32,146 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:32,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:32,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:55:32,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:55:32,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:55:32,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:32,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982121873] [2023-11-19 07:55:32,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:32,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741994235] [2023-11-19 07:55:32,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741994235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:32,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:32,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-19 07:55:32,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939770622] [2023-11-19 07:55:32,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:32,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:32,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:32,347 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:55:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:32,469 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2023-11-19 07:55:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:55:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2023-11-19 07:55:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:32,471 INFO L225 Difference]: With dead ends: 76 [2023-11-19 07:55:32,471 INFO L226 Difference]: Without dead ends: 67 [2023-11-19 07:55:32,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:55:32,473 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:32,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 99 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:55:32,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-19 07:55:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2023-11-19 07:55:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-19 07:55:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2023-11-19 07:55:32,490 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 26 [2023-11-19 07:55:32,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:32,490 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2023-11-19 07:55:32,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:55:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2023-11-19 07:55:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 07:55:32,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:32,492 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:32,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:32,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:55:32,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:32,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:32,709 INFO L85 PathProgramCache]: Analyzing trace with hash 261414752, now seen corresponding path program 1 times [2023-11-19 07:55:32,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:32,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722411385] [2023-11-19 07:55:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:32,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:32,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:32,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643336230] [2023-11-19 07:55:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:32,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:32,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:32,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:32,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:32,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:55:32,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:55:32,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:55:32,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:32,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722411385] [2023-11-19 07:55:32,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:32,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643336230] [2023-11-19 07:55:32,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643336230] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:32,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:55:32,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-19 07:55:32,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936545308] [2023-11-19 07:55:32,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:32,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:32,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:32,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:55:32,944 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 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 07:55:32,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:32,998 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2023-11-19 07:55:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:32,999 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), 1 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 26 [2023-11-19 07:55:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:33,002 INFO L225 Difference]: With dead ends: 77 [2023-11-19 07:55:33,002 INFO L226 Difference]: Without dead ends: 75 [2023-11-19 07:55:33,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:33,004 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 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 07:55:33,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:55:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-19 07:55:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-19 07:55:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-19 07:55:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2023-11-19 07:55:33,029 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 26 [2023-11-19 07:55:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:33,029 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2023-11-19 07:55:33,030 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), 1 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 07:55:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2023-11-19 07:55:33,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 07:55:33,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:33,032 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:33,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:33,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:33,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:33,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:33,249 INFO L85 PathProgramCache]: Analyzing trace with hash -857109600, now seen corresponding path program 2 times [2023-11-19 07:55:33,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:33,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412273524] [2023-11-19 07:55:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:33,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:33,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:33,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902841009] [2023-11-19 07:55:33,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:33,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:33,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:33,263 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:33,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:55:33,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:33,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:33,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:55:33,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:55:33,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 07:55:33,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:33,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412273524] [2023-11-19 07:55:33,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:33,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902841009] [2023-11-19 07:55:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902841009] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:33,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:33,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-11-19 07:55:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39230149] [2023-11-19 07:55:33,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:33,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:55:33,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:55:33,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:55:33,817 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 07:55:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:34,044 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2023-11-19 07:55:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:55:34,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 31 [2023-11-19 07:55:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:34,048 INFO L225 Difference]: With dead ends: 86 [2023-11-19 07:55:34,048 INFO L226 Difference]: Without dead ends: 81 [2023-11-19 07:55:34,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:55:34,050 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:34,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:55:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-19 07:55:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2023-11-19 07:55:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-19 07:55:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2023-11-19 07:55:34,076 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 31 [2023-11-19 07:55:34,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:34,077 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2023-11-19 07:55:34,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-19 07:55:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2023-11-19 07:55:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 07:55:34,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:34,079 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:55:34,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:34,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:55:34,301 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:34,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:34,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1192261919, now seen corresponding path program 3 times [2023-11-19 07:55:34,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:34,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702419565] [2023-11-19 07:55:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:34,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:34,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:34,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925754322] [2023-11-19 07:55:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:55:34,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:34,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:34,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:55:34,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:55:34,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:34,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 07:55:34,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-19 07:55:34,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-11-19 07:55:35,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:35,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702419565] [2023-11-19 07:55:35,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:35,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925754322] [2023-11-19 07:55:35,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925754322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:35,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:35,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2023-11-19 07:55:35,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880404870] [2023-11-19 07:55:35,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:35,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:55:35,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:35,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:55:35,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:55:35,410 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-19 07:55:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:35,660 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-11-19 07:55:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:55:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 54 [2023-11-19 07:55:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:35,664 INFO L225 Difference]: With dead ends: 80 [2023-11-19 07:55:35,665 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 07:55:35,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:55:35,674 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:35,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 124 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:55:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 07:55:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 07:55:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 07:55:35,677 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2023-11-19 07:55:35,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:35,678 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:55:35,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-19 07:55:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 07:55:35,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 07:55:35,682 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 07:55:35,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:35,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:35,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-19 07:55:36,440 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2023-11-19 07:55:36,440 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-19 07:55:36,441 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-19 07:55:36,441 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-19 07:55:36,441 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-11-19 07:55:36,441 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-19 07:55:36,441 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-19 07:55:36,441 INFO L899 garLoopResultBuilder]: For program point main_returnLabel#1(lines 21 49) no Hoare annotation was computed. [2023-11-19 07:55:36,442 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-19 07:55:36,442 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-11-19 07:55:36,442 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2023-11-19 07:55:36,442 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-11-19 07:55:36,442 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-19 07:55:36,442 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-11-19 07:55:36,443 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~t~0#1| 1) (= |ULTIMATE.start_main_~s~0#1| 1)) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1)))) [2023-11-19 07:55:36,443 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2023-11-19 07:55:36,443 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2023-11-19 07:55:36,443 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2023-11-19 07:55:36,443 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2023-11-19 07:55:36,443 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2023-11-19 07:55:36,443 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-11-19 07:55:36,447 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:36,449 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:55:36,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:55:36 BoogieIcfgContainer [2023-11-19 07:55:36,459 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:55:36,460 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:55:36,460 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:55:36,460 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:55:36,461 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:29" (3/4) ... [2023-11-19 07:55:36,463 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-19 07:55:36,466 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-19 07:55:36,471 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-11-19 07:55:36,471 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-19 07:55:36,471 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-19 07:55:36,472 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-19 07:55:36,575 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 07:55:36,576 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/witness.yml [2023-11-19 07:55:36,576 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:55:36,577 INFO L158 Benchmark]: Toolchain (without parser) took 7693.45ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 128.5MB in the beginning and 122.5MB in the end (delta: 6.0MB). Peak memory consumption was 36.7MB. Max. memory is 16.1GB. [2023-11-19 07:55:36,578 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 109.1MB. Free memory is still 77.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:55:36,578 INFO L158 Benchmark]: CACSL2BoogieTranslator took 334.76ms. Allocated memory is still 155.2MB. Free memory was 128.1MB in the beginning and 117.4MB in the end (delta: 10.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:55:36,579 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.49ms. Allocated memory is still 155.2MB. Free memory was 117.4MB in the beginning and 116.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:55:36,582 INFO L158 Benchmark]: Boogie Preprocessor took 44.13ms. Allocated memory is still 155.2MB. Free memory was 116.0MB in the beginning and 114.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:55:36,583 INFO L158 Benchmark]: RCFGBuilder took 447.08ms. Allocated memory is still 155.2MB. Free memory was 114.8MB in the beginning and 104.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:55:36,583 INFO L158 Benchmark]: TraceAbstraction took 6675.04ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 103.5MB in the beginning and 126.7MB in the end (delta: -23.2MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2023-11-19 07:55:36,584 INFO L158 Benchmark]: Witness Printer took 116.51ms. Allocated memory is still 186.6MB. Free memory was 126.7MB in the beginning and 122.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-19 07:55:36,587 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 109.1MB. Free memory is still 77.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 334.76ms. Allocated memory is still 155.2MB. Free memory was 128.1MB in the beginning and 117.4MB in the end (delta: 10.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.49ms. Allocated memory is still 155.2MB. Free memory was 117.4MB in the beginning and 116.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.13ms. Allocated memory is still 155.2MB. Free memory was 116.0MB in the beginning and 114.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 447.08ms. Allocated memory is still 155.2MB. Free memory was 114.8MB in the beginning and 104.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6675.04ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 103.5MB in the beginning and 126.7MB in the end (delta: -23.2MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. * Witness Printer took 116.51ms. Allocated memory is still 186.6MB. Free memory was 126.7MB in the beginning and 122.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.6s, OverallIterations: 9, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 103 mSDsluCounter, 722 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 530 mSDsCounter, 50 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 464 IncrementalHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50 mSolverCounterUnsat, 192 mSDtfsCounter, 464 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 316 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=8, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 43 PreInvPairs, 72 NumberOfFragments, 149 HoareAnnotationTreeSize, 43 FomulaSimplifications, 280 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 475 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 191 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 1372 SizeOfPredicates, 10 NumberOfNonLiveVariables, 492 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 415/452 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((t == (1 + (2 * a))) && ((s * 4) == (((t * t) + (2 * t)) + 1))) RESULT: Ultimate proved your program to be correct! [2023-11-19 07:55:36,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_457e704e-f6a3-46d2-82ab-30c517b684ce/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE