./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-97.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/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_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-97.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/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_09b14db4-42aa-4f6b-85e9-df91d174284b/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 71088fcc9fbf7fdd414b5a09b7fb834bc17213c2f570683779dd1957ada6c960 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:04:26,677 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:04:26,813 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:04:26,824 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:04:26,825 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:04:26,868 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:04:26,869 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:04:26,870 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:04:26,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:04:26,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:04:26,878 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:04:26,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:04:26,879 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:04:26,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:04:26,882 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:04:26,883 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:04:26,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:04:26,884 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:04:26,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:04:26,885 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:04:26,885 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:04:26,886 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:04:26,887 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:04:26,887 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:04:26,888 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:04:26,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:04:26,890 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:04:26,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:04:26,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:26,891 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:04:26,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:04:26,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:04:26,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:04:26,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:04:26,895 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:04:26,895 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:04:26,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:04:26,896 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:04:26,896 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:04:26,896 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_09b14db4-42aa-4f6b-85e9-df91d174284b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71088fcc9fbf7fdd414b5a09b7fb834bc17213c2f570683779dd1957ada6c960 [2023-11-19 08:04:27,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:04:27,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:04:27,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:04:27,298 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:04:27,299 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:04:27,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-97.i [2023-11-19 08:04:30,593 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:04:30,883 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:04:30,884 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-97.i [2023-11-19 08:04:30,911 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/data/6dfa8ed24/91e3234c3960459fbf18ccc202d75c3f/FLAG90661a740 [2023-11-19 08:04:30,936 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/data/6dfa8ed24/91e3234c3960459fbf18ccc202d75c3f [2023-11-19 08:04:30,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:04:30,946 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:04:30,950 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:30,950 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:04:30,957 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:04:30,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:30" (1/1) ... [2023-11-19 08:04:30,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df612e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:30, skipping insertion in model container [2023-11-19 08:04:30,960 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:30" (1/1) ... [2023-11-19 08:04:31,043 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:04:31,231 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_09b14db4-42aa-4f6b-85e9-df91d174284b/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-97.i[916,929] [2023-11-19 08:04:31,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:31,466 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:04:31,507 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_09b14db4-42aa-4f6b-85e9-df91d174284b/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-97.i[916,929] [2023-11-19 08:04:31,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:31,612 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:04:31,613 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31 WrapperNode [2023-11-19 08:04:31,613 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:31,615 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:31,615 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:04:31,615 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:04:31,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,649 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,758 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 445 [2023-11-19 08:04:31,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:31,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:04:31,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:04:31,760 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:04:31,771 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,780 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,780 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,833 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,852 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,858 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,862 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,881 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:04:31,883 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:04:31,883 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:04:31,883 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:04:31,886 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (1/1) ... [2023-11-19 08:04:31,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:31,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:31,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:04:32,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:04:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:04:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:04:32,031 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:04:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:04:32,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:04:32,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:04:32,201 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:04:32,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:04:33,283 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:04:33,301 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:04:33,301 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:04:33,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:33 BoogieIcfgContainer [2023-11-19 08:04:33,313 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:04:33,318 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:04:33,319 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:04:33,322 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:04:33,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:30" (1/3) ... [2023-11-19 08:04:33,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a09206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:33, skipping insertion in model container [2023-11-19 08:04:33,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:31" (2/3) ... [2023-11-19 08:04:33,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a09206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:33, skipping insertion in model container [2023-11-19 08:04:33,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:33" (3/3) ... [2023-11-19 08:04:33,327 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-97.i [2023-11-19 08:04:33,351 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:04:33,351 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:04:33,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:04:33,443 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;@531a86bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:04:33,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:04:33,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 131 states have (on average 1.5725190839694656) internal successors, (206), 132 states have internal predecessors, (206), 43 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-19 08:04:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2023-11-19 08:04:33,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:33,487 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:33,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:33,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:33,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1694341522, now seen corresponding path program 1 times [2023-11-19 08:04:33,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:33,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137460936] [2023-11-19 08:04:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:33,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:33,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:33,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137460936] [2023-11-19 08:04:33,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:04:33,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788044340] [2023-11-19 08:04:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:33,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:33,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:33,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:04:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:34,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:04:34,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2023-11-19 08:04:34,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:34,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788044340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:34,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:34,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:04:34,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745274044] [2023-11-19 08:04:34,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:34,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:04:34,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:04:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:04:34,509 INFO L87 Difference]: Start difference. First operand has 177 states, 131 states have (on average 1.5725190839694656) internal successors, (206), 132 states have internal predecessors, (206), 43 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 2 states have call successors, (43) [2023-11-19 08:04:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:34,577 INFO L93 Difference]: Finished difference Result 347 states and 621 transitions. [2023-11-19 08:04:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:04:34,580 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 2 states have call successors, (43) Word has length 289 [2023-11-19 08:04:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:34,593 INFO L225 Difference]: With dead ends: 347 [2023-11-19 08:04:34,594 INFO L226 Difference]: Without dead ends: 173 [2023-11-19 08:04:34,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 288 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 08:04:34,606 INFO L413 NwaCegarLoop]: 285 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, 285 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 08:04:34,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:04:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-19 08:04:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-11-19 08:04:34,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.5546875) internal successors, (199), 128 states have internal predecessors, (199), 43 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-19 08:04:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 285 transitions. [2023-11-19 08:04:34,690 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 285 transitions. Word has length 289 [2023-11-19 08:04:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:34,691 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 285 transitions. [2023-11-19 08:04:34,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 2 states have call successors, (43) [2023-11-19 08:04:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 285 transitions. [2023-11-19 08:04:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2023-11-19 08:04:34,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:34,700 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:34,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:34,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:34,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:34,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash 485856852, now seen corresponding path program 1 times [2023-11-19 08:04:34,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:34,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454383701] [2023-11-19 08:04:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:34,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:35,114 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:35,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336847828] [2023-11-19 08:04:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:35,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:35,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:35,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:35,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:04:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:35,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 08:04:35,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:04:36,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:36,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:36,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454383701] [2023-11-19 08:04:36,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:36,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336847828] [2023-11-19 08:04:36,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336847828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:36,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:36,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:04:36,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75270649] [2023-11-19 08:04:36,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:36,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:04:36,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:36,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:04:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:04:36,265 INFO L87 Difference]: Start difference. First operand 173 states and 285 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:04:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:37,478 INFO L93 Difference]: Finished difference Result 943 states and 1562 transitions. [2023-11-19 08:04:37,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:04:37,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 289 [2023-11-19 08:04:37,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:37,490 INFO L225 Difference]: With dead ends: 943 [2023-11-19 08:04:37,490 INFO L226 Difference]: Without dead ends: 773 [2023-11-19 08:04:37,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:04:37,493 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1267 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1267 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:37,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1267 Valid, 1454 Invalid, 779 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [393 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 08:04:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-11-19 08:04:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 478. [2023-11-19 08:04:37,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 345 states have (on average 1.5681159420289854) internal successors, (541), 345 states have internal predecessors, (541), 129 states have call successors, (129), 3 states have call predecessors, (129), 3 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-19 08:04:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 799 transitions. [2023-11-19 08:04:37,617 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 799 transitions. Word has length 289 [2023-11-19 08:04:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:37,619 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 799 transitions. [2023-11-19 08:04:37,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:04:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 799 transitions. [2023-11-19 08:04:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2023-11-19 08:04:37,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:37,626 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:37,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:37,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:37,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:37,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:37,858 INFO L85 PathProgramCache]: Analyzing trace with hash 413470294, now seen corresponding path program 1 times [2023-11-19 08:04:37,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:37,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222899152] [2023-11-19 08:04:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:37,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:37,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453291869] [2023-11-19 08:04:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:37,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:37,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:37,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:37,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:04:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:38,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:04:38,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:04:38,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:38,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222899152] [2023-11-19 08:04:38,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453291869] [2023-11-19 08:04:38,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453291869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:38,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:38,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:04:38,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959202248] [2023-11-19 08:04:38,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:38,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:04:38,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:38,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:04:38,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:04:38,353 INFO L87 Difference]: Start difference. First operand 478 states and 799 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:04:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:39,171 INFO L93 Difference]: Finished difference Result 1626 states and 2709 transitions. [2023-11-19 08:04:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:04:39,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 289 [2023-11-19 08:04:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:39,187 INFO L225 Difference]: With dead ends: 1626 [2023-11-19 08:04:39,187 INFO L226 Difference]: Without dead ends: 1269 [2023-11-19 08:04:39,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:39,192 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1296 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:39,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 1339 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 08:04:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2023-11-19 08:04:39,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 910. [2023-11-19 08:04:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 641 states have (on average 1.5163806552262091) internal successors, (972), 645 states have internal predecessors, (972), 259 states have call successors, (259), 9 states have call predecessors, (259), 9 states have return successors, (259), 255 states have call predecessors, (259), 259 states have call successors, (259) [2023-11-19 08:04:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1490 transitions. [2023-11-19 08:04:39,369 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1490 transitions. Word has length 289 [2023-11-19 08:04:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:39,371 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 1490 transitions. [2023-11-19 08:04:39,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:04:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1490 transitions. [2023-11-19 08:04:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2023-11-19 08:04:39,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:39,377 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:39,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:39,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:39,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:39,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash 354079880, now seen corresponding path program 1 times [2023-11-19 08:04:39,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:39,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675779909] [2023-11-19 08:04:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:39,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:39,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:39,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657362475] [2023-11-19 08:04:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:39,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:39,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:39,671 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:39,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:04:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:39,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:04:39,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1846 proven. 60 refuted. 0 times theorem prover too weak. 1706 trivial. 0 not checked. [2023-11-19 08:04:40,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 66 proven. 60 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-19 08:04:40,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675779909] [2023-11-19 08:04:40,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657362475] [2023-11-19 08:04:40,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657362475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:40,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:40,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:04:40,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936558157] [2023-11-19 08:04:40,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:40,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:04:40,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:40,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:04:40,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:04:40,413 INFO L87 Difference]: Start difference. First operand 910 states and 1490 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-19 08:04:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:40,774 INFO L93 Difference]: Finished difference Result 1277 states and 2086 transitions. [2023-11-19 08:04:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:04:40,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 289 [2023-11-19 08:04:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:40,780 INFO L225 Difference]: With dead ends: 1277 [2023-11-19 08:04:40,780 INFO L226 Difference]: Without dead ends: 484 [2023-11-19 08:04:40,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 570 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:04:40,784 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 200 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:40,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 580 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:04:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-11-19 08:04:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 478. [2023-11-19 08:04:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 342 states have (on average 1.523391812865497) internal successors, (521), 342 states have internal predecessors, (521), 129 states have call successors, (129), 6 states have call predecessors, (129), 6 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-19 08:04:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 779 transitions. [2023-11-19 08:04:40,841 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 779 transitions. Word has length 289 [2023-11-19 08:04:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:40,843 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 779 transitions. [2023-11-19 08:04:40,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 2 states have call successors, (63), 2 states have call predecessors, (63), 4 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-19 08:04:40,843 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 779 transitions. [2023-11-19 08:04:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-11-19 08:04:40,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:40,849 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:40,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:41,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:41,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:41,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash -865557662, now seen corresponding path program 1 times [2023-11-19 08:04:41,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:41,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300324084] [2023-11-19 08:04:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:41,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:41,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:41,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832856240] [2023-11-19 08:04:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:41,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:41,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:41,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:41,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:04:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:41,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:04:41,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1342 proven. 96 refuted. 0 times theorem prover too weak. 2174 trivial. 0 not checked. [2023-11-19 08:04:41,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 30 proven. 96 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-19 08:04:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300324084] [2023-11-19 08:04:42,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832856240] [2023-11-19 08:04:42,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832856240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:42,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:42,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 08:04:42,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441310229] [2023-11-19 08:04:42,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:04:42,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:42,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:04:42,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:42,234 INFO L87 Difference]: Start difference. First operand 478 states and 779 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 3 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) [2023-11-19 08:04:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:42,626 INFO L93 Difference]: Finished difference Result 853 states and 1377 transitions. [2023-11-19 08:04:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:04:42,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 3 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) Word has length 290 [2023-11-19 08:04:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:42,636 INFO L225 Difference]: With dead ends: 853 [2023-11-19 08:04:42,636 INFO L226 Difference]: Without dead ends: 496 [2023-11-19 08:04:42,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:04:42,639 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 435 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:42,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 564 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:04:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-19 08:04:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 490. [2023-11-19 08:04:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 351 states have (on average 1.5042735042735043) internal successors, (528), 351 states have internal predecessors, (528), 129 states have call successors, (129), 9 states have call predecessors, (129), 9 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-19 08:04:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 786 transitions. [2023-11-19 08:04:42,713 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 786 transitions. Word has length 290 [2023-11-19 08:04:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:42,715 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 786 transitions. [2023-11-19 08:04:42,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 3 states have call successors, (75), 2 states have call predecessors, (75), 4 states have return successors, (76), 3 states have call predecessors, (76), 3 states have call successors, (76) [2023-11-19 08:04:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 786 transitions. [2023-11-19 08:04:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-11-19 08:04:42,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:42,723 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:42,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:42,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:42,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:42,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash -646702944, now seen corresponding path program 1 times [2023-11-19 08:04:42,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:42,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466444837] [2023-11-19 08:04:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:43,011 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:43,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530686927] [2023-11-19 08:04:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:43,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:43,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:43,013 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:43,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:04:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:43,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:04:43,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:04:43,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:43,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:43,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466444837] [2023-11-19 08:04:43,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:43,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530686927] [2023-11-19 08:04:43,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530686927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:43,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:43,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:43,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71422961] [2023-11-19 08:04:43,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:43,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:43,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:43,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:43,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:43,717 INFO L87 Difference]: Start difference. First operand 490 states and 786 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:04:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:43,925 INFO L93 Difference]: Finished difference Result 680 states and 1090 transitions. [2023-11-19 08:04:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:43,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 290 [2023-11-19 08:04:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:43,929 INFO L225 Difference]: With dead ends: 680 [2023-11-19 08:04:43,929 INFO L226 Difference]: Without dead ends: 277 [2023-11-19 08:04:43,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:04:43,935 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 327 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:43,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 257 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:04:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-19 08:04:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2023-11-19 08:04:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 184 states have (on average 1.4021739130434783) internal successors, (258), 184 states have internal predecessors, (258), 86 states have call successors, (86), 6 states have call predecessors, (86), 6 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-19 08:04:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 430 transitions. [2023-11-19 08:04:43,984 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 430 transitions. Word has length 290 [2023-11-19 08:04:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:43,984 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 430 transitions. [2023-11-19 08:04:43,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:04:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 430 transitions. [2023-11-19 08:04:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2023-11-19 08:04:43,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:43,991 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:44,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:44,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:44,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:44,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash -566365700, now seen corresponding path program 1 times [2023-11-19 08:04:44,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:44,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274401688] [2023-11-19 08:04:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:44,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:44,281 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:44,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062374169] [2023-11-19 08:04:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:44,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:44,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:44,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:44,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:04:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:44,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:04:44,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 548 proven. 237 refuted. 0 times theorem prover too weak. 2827 trivial. 0 not checked. [2023-11-19 08:04:45,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 9 proven. 240 refuted. 0 times theorem prover too weak. 3363 trivial. 0 not checked. [2023-11-19 08:04:46,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:46,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274401688] [2023-11-19 08:04:46,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:46,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062374169] [2023-11-19 08:04:46,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062374169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:46,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:46,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-19 08:04:46,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352679120] [2023-11-19 08:04:46,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:46,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:04:46,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:04:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:04:46,422 INFO L87 Difference]: Start difference. First operand 277 states and 430 transitions. Second operand has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 5 states have call successors, (85), 3 states have call predecessors, (85), 7 states have return successors, (86), 4 states have call predecessors, (86), 5 states have call successors, (86) [2023-11-19 08:04:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:47,100 INFO L93 Difference]: Finished difference Result 492 states and 752 transitions. [2023-11-19 08:04:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 08:04:47,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 5 states have call successors, (85), 3 states have call predecessors, (85), 7 states have return successors, (86), 4 states have call predecessors, (86), 5 states have call successors, (86) Word has length 291 [2023-11-19 08:04:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:47,105 INFO L225 Difference]: With dead ends: 492 [2023-11-19 08:04:47,105 INFO L226 Difference]: Without dead ends: 301 [2023-11-19 08:04:47,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:04:47,107 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 754 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:47,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 666 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:04:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-11-19 08:04:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 293. [2023-11-19 08:04:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 196 states have (on average 1.3622448979591837) internal successors, (267), 196 states have internal predecessors, (267), 86 states have call successors, (86), 10 states have call predecessors, (86), 10 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-19 08:04:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 439 transitions. [2023-11-19 08:04:47,182 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 439 transitions. Word has length 291 [2023-11-19 08:04:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:47,184 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 439 transitions. [2023-11-19 08:04:47,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.714285714285714) internal successors, (122), 14 states have internal predecessors, (122), 5 states have call successors, (85), 3 states have call predecessors, (85), 7 states have return successors, (86), 4 states have call predecessors, (86), 5 states have call successors, (86) [2023-11-19 08:04:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 439 transitions. [2023-11-19 08:04:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-19 08:04:47,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:47,190 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:47,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:47,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:47,414 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:47,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:47,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1055488184, now seen corresponding path program 1 times [2023-11-19 08:04:47,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:47,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195186076] [2023-11-19 08:04:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:47,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:47,479 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:47,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701808644] [2023-11-19 08:04:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:47,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:47,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:47,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:47,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:04:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:47,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 08:04:47,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 2285 proven. 87 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2023-11-19 08:04:48,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 273 proven. 96 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2023-11-19 08:04:49,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:49,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195186076] [2023-11-19 08:04:49,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701808644] [2023-11-19 08:04:49,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701808644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:49,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:49,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2023-11-19 08:04:49,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186293257] [2023-11-19 08:04:49,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:49,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 08:04:49,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 08:04:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2023-11-19 08:04:49,770 INFO L87 Difference]: Start difference. First operand 293 states and 439 transitions. Second operand has 26 states, 26 states have (on average 6.038461538461538) internal successors, (157), 26 states have internal predecessors, (157), 8 states have call successors, (86), 5 states have call predecessors, (86), 11 states have return successors, (86), 8 states have call predecessors, (86), 8 states have call successors, (86) [2023-11-19 08:04:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:55,150 INFO L93 Difference]: Finished difference Result 1298 states and 1921 transitions. [2023-11-19 08:04:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-19 08:04:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.038461538461538) internal successors, (157), 26 states have internal predecessors, (157), 8 states have call successors, (86), 5 states have call predecessors, (86), 11 states have return successors, (86), 8 states have call predecessors, (86), 8 states have call successors, (86) Word has length 292 [2023-11-19 08:04:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:55,161 INFO L225 Difference]: With dead ends: 1298 [2023-11-19 08:04:55,161 INFO L226 Difference]: Without dead ends: 1111 [2023-11-19 08:04:55,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1350, Invalid=3762, Unknown=0, NotChecked=0, Total=5112 [2023-11-19 08:04:55,166 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 2023 mSDsluCounter, 2888 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2044 SdHoareTripleChecker+Valid, 3239 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:55,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2044 Valid, 3239 Invalid, 3073 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [758 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-19 08:04:55,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2023-11-19 08:04:55,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 638. [2023-11-19 08:04:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 461 states have (on average 1.3774403470715835) internal successors, (635), 463 states have internal predecessors, (635), 149 states have call successors, (149), 27 states have call predecessors, (149), 27 states have return successors, (149), 147 states have call predecessors, (149), 149 states have call successors, (149) [2023-11-19 08:04:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 933 transitions. [2023-11-19 08:04:55,285 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 933 transitions. Word has length 292 [2023-11-19 08:04:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:55,286 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 933 transitions. [2023-11-19 08:04:55,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.038461538461538) internal successors, (157), 26 states have internal predecessors, (157), 8 states have call successors, (86), 5 states have call predecessors, (86), 11 states have return successors, (86), 8 states have call predecessors, (86), 8 states have call successors, (86) [2023-11-19 08:04:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 933 transitions. [2023-11-19 08:04:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-19 08:04:55,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:55,292 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:55,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:55,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:55,515 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:55,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1311206410, now seen corresponding path program 1 times [2023-11-19 08:04:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:55,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124175103] [2023-11-19 08:04:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:55,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:55,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:55,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098049761] [2023-11-19 08:04:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:55,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:55,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:55,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:55,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:04:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:55,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:04:55,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:04:56,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:56,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124175103] [2023-11-19 08:04:56,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098049761] [2023-11-19 08:04:56,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098049761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:56,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:56,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:56,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694711915] [2023-11-19 08:04:56,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:56,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:56,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:56,342 INFO L87 Difference]: Start difference. First operand 638 states and 933 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:04:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:56,553 INFO L93 Difference]: Finished difference Result 1709 states and 2521 transitions. [2023-11-19 08:04:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:04:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 292 [2023-11-19 08:04:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:56,564 INFO L225 Difference]: With dead ends: 1709 [2023-11-19 08:04:56,564 INFO L226 Difference]: Without dead ends: 1172 [2023-11-19 08:04:56,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:04:56,566 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 157 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:56,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 757 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:04:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2023-11-19 08:04:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1142. [2023-11-19 08:04:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 840 states have (on average 1.380952380952381) internal successors, (1160), 843 states have internal predecessors, (1160), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 252 states have call predecessors, (255), 255 states have call successors, (255) [2023-11-19 08:04:56,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1670 transitions. [2023-11-19 08:04:56,777 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1670 transitions. Word has length 292 [2023-11-19 08:04:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:56,778 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 1670 transitions. [2023-11-19 08:04:56,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:04:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1670 transitions. [2023-11-19 08:04:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-19 08:04:56,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:56,784 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:56,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:57,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 08:04:57,004 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:57,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1370596824, now seen corresponding path program 1 times [2023-11-19 08:04:57,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:57,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493738043] [2023-11-19 08:04:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:57,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:57,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:57,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16472493] [2023-11-19 08:04:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:57,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:57,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:57,060 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:57,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:04:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:57,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:04:57,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:04:57,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:57,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:57,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493738043] [2023-11-19 08:04:57,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:57,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16472493] [2023-11-19 08:04:57,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16472493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:57,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:57,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:04:57,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850520176] [2023-11-19 08:04:57,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:57,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:04:57,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:04:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:04:57,717 INFO L87 Difference]: Start difference. First operand 1142 states and 1670 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:04:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:58,111 INFO L93 Difference]: Finished difference Result 2665 states and 3959 transitions. [2023-11-19 08:04:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:04:58,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 292 [2023-11-19 08:04:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:58,124 INFO L225 Difference]: With dead ends: 2665 [2023-11-19 08:04:58,124 INFO L226 Difference]: Without dead ends: 1624 [2023-11-19 08:04:58,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:04:58,129 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 307 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:58,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1402 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:04:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2023-11-19 08:04:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1186. [2023-11-19 08:04:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 884 states have (on average 1.3868778280542986) internal successors, (1226), 886 states have internal predecessors, (1226), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 253 states have call predecessors, (255), 255 states have call successors, (255) [2023-11-19 08:04:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1736 transitions. [2023-11-19 08:04:58,391 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1736 transitions. Word has length 292 [2023-11-19 08:04:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:58,392 INFO L495 AbstractCegarLoop]: Abstraction has 1186 states and 1736 transitions. [2023-11-19 08:04:58,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:04:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1736 transitions. [2023-11-19 08:04:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-19 08:04:58,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:58,396 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:58,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:58,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:04:58,620 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:58,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:58,621 INFO L85 PathProgramCache]: Analyzing trace with hash -946950102, now seen corresponding path program 1 times [2023-11-19 08:04:58,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:58,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557587355] [2023-11-19 08:04:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:58,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:58,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786414349] [2023-11-19 08:04:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:58,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:58,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:58,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:58,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:04:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:58,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 08:04:58,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1283 proven. 303 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2023-11-19 08:05:00,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 60 proven. 189 refuted. 0 times theorem prover too weak. 3363 trivial. 0 not checked. [2023-11-19 08:05:02,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:02,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557587355] [2023-11-19 08:05:02,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786414349] [2023-11-19 08:05:02,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786414349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:02,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:05:02,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-19 08:05:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808532701] [2023-11-19 08:05:02,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:02,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 08:05:02,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:02,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 08:05:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-11-19 08:05:02,268 INFO L87 Difference]: Start difference. First operand 1186 states and 1736 transitions. Second operand has 16 states, 15 states have (on average 10.333333333333334) internal successors, (155), 14 states have internal predecessors, (155), 6 states have call successors, (86), 4 states have call predecessors, (86), 7 states have return successors, (86), 6 states have call predecessors, (86), 6 states have call successors, (86) [2023-11-19 08:05:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:05,726 INFO L93 Difference]: Finished difference Result 5752 states and 8389 transitions. [2023-11-19 08:05:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 08:05:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 10.333333333333334) internal successors, (155), 14 states have internal predecessors, (155), 6 states have call successors, (86), 4 states have call predecessors, (86), 7 states have return successors, (86), 6 states have call predecessors, (86), 6 states have call successors, (86) Word has length 292 [2023-11-19 08:05:05,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:05,757 INFO L225 Difference]: With dead ends: 5752 [2023-11-19 08:05:05,758 INFO L226 Difference]: Without dead ends: 4711 [2023-11-19 08:05:05,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=383, Invalid=739, Unknown=0, NotChecked=0, Total=1122 [2023-11-19 08:05:05,763 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 1294 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:05,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1306 Valid, 1788 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-19 08:05:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2023-11-19 08:05:06,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3698. [2023-11-19 08:05:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 2805 states have (on average 1.366488413547237) internal successors, (3833), 2817 states have internal predecessors, (3833), 739 states have call successors, (739), 153 states have call predecessors, (739), 153 states have return successors, (739), 727 states have call predecessors, (739), 739 states have call successors, (739) [2023-11-19 08:05:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 5311 transitions. [2023-11-19 08:05:06,520 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 5311 transitions. Word has length 292 [2023-11-19 08:05:06,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:06,520 INFO L495 AbstractCegarLoop]: Abstraction has 3698 states and 5311 transitions. [2023-11-19 08:05:06,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 10.333333333333334) internal successors, (155), 14 states have internal predecessors, (155), 6 states have call successors, (86), 4 states have call predecessors, (86), 7 states have return successors, (86), 6 states have call predecessors, (86), 6 states have call successors, (86) [2023-11-19 08:05:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 5311 transitions. [2023-11-19 08:05:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-19 08:05:06,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:06,555 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:06,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:06,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:06,756 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:06,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:06,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1735582013, now seen corresponding path program 1 times [2023-11-19 08:05:06,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:06,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756832979] [2023-11-19 08:05:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:06,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:06,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:06,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120351853] [2023-11-19 08:05:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:06,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:06,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:06,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:06,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09b14db4-42aa-4f6b-85e9-df91d174284b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:05:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:07,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 08:05:07,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1975 proven. 327 refuted. 0 times theorem prover too weak. 1310 trivial. 0 not checked. [2023-11-19 08:05:10,109 INFO L327 TraceCheckSpWp]: Computing backward predicates...