./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/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_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/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_a316bd49-c533-4c35-96a1-88d992b59051/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 cde063dcb13ed313b2f32e49cd3dc75da2c365cf6b52ae59dd9b17042beff0a8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:03,884 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:04,005 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:50:04,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:04,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:04,056 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:04,056 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:04,057 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:04,058 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:04,063 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:04,064 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:04,064 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:04,065 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:04,067 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:04,067 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:50:04,068 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:04,068 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:04,068 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:04,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:04,069 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:50:04,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:04,070 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:50:04,071 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:04,071 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:50:04,071 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:04,072 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:04,073 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:04,073 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:04,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:04,074 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:04,075 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:04,076 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:50:04,076 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:04,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:04,076 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:04,077 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:50:04,077 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:04,077 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:04,077 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:04,078 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_a316bd49-c533-4c35-96a1-88d992b59051/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cde063dcb13ed313b2f32e49cd3dc75da2c365cf6b52ae59dd9b17042beff0a8 [2023-11-19 07:50:04,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:04,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:04,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:04,429 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:04,430 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:04,431 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i [2023-11-19 07:50:07,517 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:07,894 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:07,896 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i [2023-11-19 07:50:07,914 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/data/8aaad5860/8feb04ffb40d4b5580115647f0e7b1fb/FLAGae4255f3d [2023-11-19 07:50:07,931 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/data/8aaad5860/8feb04ffb40d4b5580115647f0e7b1fb [2023-11-19 07:50:07,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:07,935 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:07,936 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:07,936 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:07,942 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:07,943 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:07" (1/1) ... [2023-11-19 07:50:07,944 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@314f94e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:07, skipping insertion in model container [2023-11-19 07:50:07,944 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:07" (1/1) ... [2023-11-19 07:50:08,001 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:08,179 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_a316bd49-c533-4c35-96a1-88d992b59051/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i[916,929] [2023-11-19 07:50:08,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:08,381 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:08,393 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_a316bd49-c533-4c35-96a1-88d992b59051/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i[916,929] [2023-11-19 07:50:08,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:08,577 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:08,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08 WrapperNode [2023-11-19 07:50:08,578 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:08,579 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:08,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:08,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:08,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,610 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,678 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 450 [2023-11-19 07:50:08,679 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:08,680 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:08,680 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:08,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:08,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,703 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,739 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,757 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,787 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,815 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:08,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:08,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:08,816 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:08,817 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (1/1) ... [2023-11-19 07:50:08,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:08,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:08,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:08,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:08,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:08,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:50:08,899 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:50:08,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:08,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:08,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:09,053 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:09,055 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:09,978 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:09,989 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:09,990 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:50:09,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:09 BoogieIcfgContainer [2023-11-19 07:50:09,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:10,002 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:10,002 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:10,006 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:10,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:07" (1/3) ... [2023-11-19 07:50:10,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f5ad23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:10, skipping insertion in model container [2023-11-19 07:50:10,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:08" (2/3) ... [2023-11-19 07:50:10,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f5ad23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:10, skipping insertion in model container [2023-11-19 07:50:10,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:09" (3/3) ... [2023-11-19 07:50:10,010 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-27.i [2023-11-19 07:50:10,031 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:10,032 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:50:10,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:10,121 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;@c5a8450, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:10,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:50:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 184 states, 130 states have (on average 1.523076923076923) internal successors, (198), 131 states have internal predecessors, (198), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-19 07:50:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2023-11-19 07:50:10,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:10,154 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:10,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:10,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:10,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1133111130, now seen corresponding path program 1 times [2023-11-19 07:50:10,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:10,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279259024] [2023-11-19 07:50:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:10,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:10,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:10,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279259024] [2023-11-19 07:50:10,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:50:10,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076179691] [2023-11-19 07:50:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:10,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:10,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:10,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:10,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:50:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:11,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:50:11,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2023-11-19 07:50:11,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:11,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076179691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:11,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:11,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:11,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906281961] [2023-11-19 07:50:11,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:11,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:11,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:11,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:11,233 INFO L87 Difference]: Start difference. First operand has 184 states, 130 states have (on average 1.523076923076923) internal successors, (198), 131 states have internal predecessors, (198), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-19 07:50:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:11,324 INFO L93 Difference]: Finished difference Result 360 states and 643 transitions. [2023-11-19 07:50:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:11,328 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) Word has length 340 [2023-11-19 07:50:11,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:11,342 INFO L225 Difference]: With dead ends: 360 [2023-11-19 07:50:11,342 INFO L226 Difference]: Without dead ends: 179 [2023-11-19 07:50:11,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:11,358 INFO L413 NwaCegarLoop]: 289 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, 289 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:11,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-19 07:50:11,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-11-19 07:50:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 126 states have (on average 1.4841269841269842) internal successors, (187), 126 states have internal predecessors, (187), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-19 07:50:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 289 transitions. [2023-11-19 07:50:11,448 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 289 transitions. Word has length 340 [2023-11-19 07:50:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:11,449 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 289 transitions. [2023-11-19 07:50:11,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-19 07:50:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 289 transitions. [2023-11-19 07:50:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2023-11-19 07:50:11,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:11,469 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:11,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:11,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:50:11,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:11,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:11,686 INFO L85 PathProgramCache]: Analyzing trace with hash 719381412, now seen corresponding path program 1 times [2023-11-19 07:50:11,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:11,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123314920] [2023-11-19 07:50:11,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:11,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:11,887 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:11,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968794778] [2023-11-19 07:50:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:11,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:11,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:11,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:11,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:50:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:12,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:50:12,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-19 07:50:13,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:13,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123314920] [2023-11-19 07:50:13,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:13,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968794778] [2023-11-19 07:50:13,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968794778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:13,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:13,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:50:13,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357477776] [2023-11-19 07:50:13,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:13,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:50:13,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:13,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:50:13,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:50:13,444 INFO L87 Difference]: Start difference. First operand 179 states and 289 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-19 07:50:15,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:15,108 INFO L93 Difference]: Finished difference Result 1251 states and 2042 transitions. [2023-11-19 07:50:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:50:15,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 341 [2023-11-19 07:50:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:15,125 INFO L225 Difference]: With dead ends: 1251 [2023-11-19 07:50:15,126 INFO L226 Difference]: Without dead ends: 1075 [2023-11-19 07:50:15,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:50:15,129 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 1310 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:15,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1310 Valid, 2484 Invalid, 895 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [210 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 07:50:15,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2023-11-19 07:50:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 566. [2023-11-19 07:50:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 429 states have (on average 1.5034965034965035) internal successors, (645), 430 states have internal predecessors, (645), 132 states have call successors, (132), 4 states have call predecessors, (132), 4 states have return successors, (132), 131 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-19 07:50:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 909 transitions. [2023-11-19 07:50:15,227 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 909 transitions. Word has length 341 [2023-11-19 07:50:15,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:15,229 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 909 transitions. [2023-11-19 07:50:15,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-19 07:50:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 909 transitions. [2023-11-19 07:50:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2023-11-19 07:50:15,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:15,237 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:15,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:15,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:15,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:15,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:15,458 INFO L85 PathProgramCache]: Analyzing trace with hash -611411036, now seen corresponding path program 1 times [2023-11-19 07:50:15,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:15,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131498793] [2023-11-19 07:50:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:15,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:15,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:15,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510315677] [2023-11-19 07:50:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:15,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:15,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:15,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:15,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:50:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:15,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:50:15,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2810 proven. 207 refuted. 0 times theorem prover too weak. 2083 trivial. 0 not checked. [2023-11-19 07:50:16,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 87 proven. 210 refuted. 0 times theorem prover too weak. 4803 trivial. 0 not checked. [2023-11-19 07:50:17,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:17,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131498793] [2023-11-19 07:50:17,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:17,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510315677] [2023-11-19 07:50:17,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510315677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:17,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:17,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-19 07:50:17,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861788637] [2023-11-19 07:50:17,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:17,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:50:17,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:17,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:50:17,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:50:17,200 INFO L87 Difference]: Start difference. First operand 566 states and 909 transitions. Second operand has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 15 states have internal predecessors, (140), 4 states have call successors, (91), 3 states have call predecessors, (91), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-19 07:50:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:17,876 INFO L93 Difference]: Finished difference Result 1157 states and 1837 transitions. [2023-11-19 07:50:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:50:17,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 15 states have internal predecessors, (140), 4 states have call successors, (91), 3 states have call predecessors, (91), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) Word has length 342 [2023-11-19 07:50:17,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:17,884 INFO L225 Difference]: With dead ends: 1157 [2023-11-19 07:50:17,885 INFO L226 Difference]: Without dead ends: 594 [2023-11-19 07:50:17,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 668 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:50:17,890 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 651 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:17,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 757 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:50:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2023-11-19 07:50:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 590. [2023-11-19 07:50:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 447 states have (on average 1.476510067114094) internal successors, (660), 448 states have internal predecessors, (660), 132 states have call successors, (132), 10 states have call predecessors, (132), 10 states have return successors, (132), 131 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-19 07:50:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 924 transitions. [2023-11-19 07:50:17,985 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 924 transitions. Word has length 342 [2023-11-19 07:50:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:17,987 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 924 transitions. [2023-11-19 07:50:17,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 15 states have internal predecessors, (140), 4 states have call successors, (91), 3 states have call predecessors, (91), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-19 07:50:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 924 transitions. [2023-11-19 07:50:17,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2023-11-19 07:50:17,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:17,995 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:18,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:18,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:18,214 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:18,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:18,215 INFO L85 PathProgramCache]: Analyzing trace with hash -187764314, now seen corresponding path program 1 times [2023-11-19 07:50:18,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:18,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198441886] [2023-11-19 07:50:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:18,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:18,315 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:18,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603827991] [2023-11-19 07:50:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:18,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:18,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:18,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:50:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:18,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:50:18,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 3155 proven. 192 refuted. 0 times theorem prover too weak. 1753 trivial. 0 not checked. [2023-11-19 07:50:19,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 102 proven. 195 refuted. 0 times theorem prover too weak. 4803 trivial. 0 not checked. [2023-11-19 07:50:20,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:20,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198441886] [2023-11-19 07:50:20,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:20,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603827991] [2023-11-19 07:50:20,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603827991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:20,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:20,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-19 07:50:20,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621212936] [2023-11-19 07:50:20,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:20,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:50:20,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:50:20,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:50:20,243 INFO L87 Difference]: Start difference. First operand 590 states and 924 transitions. Second operand has 16 states, 16 states have (on average 10.6875) internal successors, (171), 16 states have internal predecessors, (171), 5 states have call successors, (92), 3 states have call predecessors, (92), 7 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) [2023-11-19 07:50:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:21,334 INFO L93 Difference]: Finished difference Result 1566 states and 2443 transitions. [2023-11-19 07:50:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:50:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.6875) internal successors, (171), 16 states have internal predecessors, (171), 5 states have call successors, (92), 3 states have call predecessors, (92), 7 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) Word has length 342 [2023-11-19 07:50:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:21,343 INFO L225 Difference]: With dead ends: 1566 [2023-11-19 07:50:21,344 INFO L226 Difference]: Without dead ends: 979 [2023-11-19 07:50:21,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 669 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:50:21,352 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 960 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:21,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 1028 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:50:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2023-11-19 07:50:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 964. [2023-11-19 07:50:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 788 states have (on average 1.4936548223350254) internal successors, (1177), 792 states have internal predecessors, (1177), 156 states have call successors, (156), 19 states have call predecessors, (156), 19 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-19 07:50:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1489 transitions. [2023-11-19 07:50:21,471 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1489 transitions. Word has length 342 [2023-11-19 07:50:21,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:21,475 INFO L495 AbstractCegarLoop]: Abstraction has 964 states and 1489 transitions. [2023-11-19 07:50:21,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.6875) internal successors, (171), 16 states have internal predecessors, (171), 5 states have call successors, (92), 3 states have call predecessors, (92), 7 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) [2023-11-19 07:50:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1489 transitions. [2023-11-19 07:50:21,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-19 07:50:21,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:21,485 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:21,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:21,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:21,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:21,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash 389431114, now seen corresponding path program 1 times [2023-11-19 07:50:21,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:21,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441034142] [2023-11-19 07:50:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:21,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:21,773 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:21,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245417895] [2023-11-19 07:50:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:21,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:21,775 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:21,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:50:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:22,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:50:22,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 434 proven. 54 refuted. 0 times theorem prover too weak. 4612 trivial. 0 not checked. [2023-11-19 07:50:22,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 147 proven. 3 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-19 07:50:22,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:22,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441034142] [2023-11-19 07:50:22,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:22,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245417895] [2023-11-19 07:50:22,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245417895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:22,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:22,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-11-19 07:50:22,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331793584] [2023-11-19 07:50:22,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:22,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:50:22,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:50:22,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:50:22,621 INFO L87 Difference]: Start difference. First operand 964 states and 1489 transitions. Second operand has 12 states, 12 states have (on average 9.833333333333334) internal successors, (118), 12 states have internal predecessors, (118), 2 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (54), 3 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-19 07:50:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:23,744 INFO L93 Difference]: Finished difference Result 1934 states and 2904 transitions. [2023-11-19 07:50:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:50:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.833333333333334) internal successors, (118), 12 states have internal predecessors, (118), 2 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (54), 3 states have call predecessors, (54), 2 states have call successors, (54) Word has length 343 [2023-11-19 07:50:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:23,753 INFO L225 Difference]: With dead ends: 1934 [2023-11-19 07:50:23,754 INFO L226 Difference]: Without dead ends: 973 [2023-11-19 07:50:23,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 674 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:50:23,758 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 699 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:23,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 830 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:50:23,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2023-11-19 07:50:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 878. [2023-11-19 07:50:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 662 states have (on average 1.3580060422960725) internal successors, (899), 667 states have internal predecessors, (899), 186 states have call successors, (186), 29 states have call predecessors, (186), 29 states have return successors, (186), 181 states have call predecessors, (186), 186 states have call successors, (186) [2023-11-19 07:50:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1271 transitions. [2023-11-19 07:50:23,906 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1271 transitions. Word has length 343 [2023-11-19 07:50:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:23,907 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 1271 transitions. [2023-11-19 07:50:23,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.833333333333334) internal successors, (118), 12 states have internal predecessors, (118), 2 states have call successors, (52), 2 states have call predecessors, (52), 4 states have return successors, (54), 3 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-19 07:50:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1271 transitions. [2023-11-19 07:50:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-19 07:50:23,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:23,914 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:23,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:24,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:24,131 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:24,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2000249753, now seen corresponding path program 1 times [2023-11-19 07:50:24,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:24,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539534981] [2023-11-19 07:50:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:24,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:24,210 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:24,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780030253] [2023-11-19 07:50:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:24,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:24,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:24,213 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:24,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a316bd49-c533-4c35-96a1-88d992b59051/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:50:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:24,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-19 07:50:24,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 3978 proven. 297 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2023-11-19 07:50:29,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 393 proven. 327 refuted. 0 times theorem prover too weak. 4380 trivial. 0 not checked. [2023-11-19 07:50:36,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:36,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539534981] [2023-11-19 07:50:36,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:36,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780030253] [2023-11-19 07:50:36,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780030253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:36,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:36,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2023-11-19 07:50:36,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075480495] [2023-11-19 07:50:36,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:36,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-19 07:50:36,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:36,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-19 07:50:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=1610, Unknown=0, NotChecked=0, Total=2070 [2023-11-19 07:50:36,052 INFO L87 Difference]: Start difference. First operand 878 states and 1271 transitions. Second operand has 46 states, 44 states have (on average 4.863636363636363) internal successors, (214), 42 states have internal predecessors, (214), 14 states have call successors, (102), 8 states have call predecessors, (102), 16 states have return successors, (102), 14 states have call predecessors, (102), 14 states have call successors, (102)