./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.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_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/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_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/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_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/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 a92ccd1f56cdb28b8e6efc63e50fd814467549956882758cf5aa04b7a8a9eb25 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:04:42,765 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:04:42,840 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:04:42,846 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:04:42,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:04:42,872 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:04:42,873 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:04:42,873 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:04:42,874 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:04:42,875 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:04:42,876 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:04:42,877 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:04:42,877 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:04:42,878 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:04:42,879 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:04:42,880 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:04:42,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:04:42,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:04:42,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:04:42,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:04:42,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:04:42,886 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:04:42,886 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:04:42,887 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:04:42,888 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:04:42,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:04:42,889 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:04:42,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:04:42,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:42,891 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:04:42,892 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:04:42,893 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:04:42,893 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:04:42,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:04:42,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:04:42,894 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:04:42,894 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:04:42,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:04:42,895 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:04:42,895 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_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92ccd1f56cdb28b8e6efc63e50fd814467549956882758cf5aa04b7a8a9eb25 [2023-11-19 08:04:43,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:04:43,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:04:43,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:04:43,203 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:04:43,204 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:04:43,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i [2023-11-19 08:04:46,326 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:04:46,702 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:04:46,703 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i [2023-11-19 08:04:46,716 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/data/5145f522e/e32dc41542d241c6b21da980801ba1a1/FLAG80ff81cd6 [2023-11-19 08:04:46,732 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/data/5145f522e/e32dc41542d241c6b21da980801ba1a1 [2023-11-19 08:04:46,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:04:46,737 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:04:46,738 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:46,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:04:46,744 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:04:46,745 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4921337f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:46, skipping insertion in model container [2023-11-19 08:04:46,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:46" (1/1) ... [2023-11-19 08:04:46,813 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:04:47,017 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_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i[916,929] [2023-11-19 08:04:47,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:47,254 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:04:47,267 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_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-94.i[916,929] [2023-11-19 08:04:47,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:47,442 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:04:47,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47 WrapperNode [2023-11-19 08:04:47,443 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:47,445 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:47,445 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:04:47,445 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:04:47,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,481 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,630 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 492 [2023-11-19 08:04:47,631 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:47,632 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:04:47,632 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:04:47,632 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:04:47,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,655 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,704 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,710 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,724 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,731 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,742 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:04:47,743 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:04:47,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:04:47,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:04:47,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (1/1) ... [2023-11-19 08:04:47,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:47,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:47,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:04:47,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:04:47,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:04:47,828 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:04:47,828 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:04:47,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:04:47,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:04:47,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:04:47,991 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:04:47,993 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:04:48,995 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:04:49,014 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:04:49,014 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:04:49,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:49 BoogieIcfgContainer [2023-11-19 08:04:49,025 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:04:49,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:04:49,032 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:04:49,036 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:04:49,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:46" (1/3) ... [2023-11-19 08:04:49,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3251f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:49, skipping insertion in model container [2023-11-19 08:04:49,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:47" (2/3) ... [2023-11-19 08:04:49,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3251f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:49, skipping insertion in model container [2023-11-19 08:04:49,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:49" (3/3) ... [2023-11-19 08:04:49,041 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-94.i [2023-11-19 08:04:49,061 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:04:49,061 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:04:49,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:04:49,129 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;@761b3e01, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:04:49,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:04:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 178 states, 136 states have (on average 1.5661764705882353) internal successors, (213), 137 states have internal predecessors, (213), 39 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 08:04:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-11-19 08:04:49,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:49,178 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:04:49,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:49,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1501674573, now seen corresponding path program 1 times [2023-11-19 08:04:49,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:49,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397933723] [2023-11-19 08:04:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:49,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:49,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:49,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397933723] [2023-11-19 08:04:49,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:04:49,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176967651] [2023-11-19 08:04:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:49,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:49,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:49,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:49,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:04:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:49,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:04:49,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2023-11-19 08:04:50,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:50,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176967651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:50,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:50,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:04:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590778778] [2023-11-19 08:04:50,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:50,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:04:50,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:04:50,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:04:50,084 INFO L87 Difference]: Start difference. First operand has 178 states, 136 states have (on average 1.5661764705882353) internal successors, (213), 137 states have internal predecessors, (213), 39 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 2 states have call successors, (39) [2023-11-19 08:04:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:50,158 INFO L93 Difference]: Finished difference Result 349 states and 615 transitions. [2023-11-19 08:04:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:04:50,160 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 2 states have call successors, (39) Word has length 275 [2023-11-19 08:04:50,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:50,170 INFO L225 Difference]: With dead ends: 349 [2023-11-19 08:04:50,170 INFO L226 Difference]: Without dead ends: 174 [2023-11-19 08:04:50,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 274 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 08:04:50,182 INFO L413 NwaCegarLoop]: 284 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, 284 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 08:04:50,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:04:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-19 08:04:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2023-11-19 08:04:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 133 states have (on average 1.5488721804511278) internal successors, (206), 133 states have internal predecessors, (206), 39 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-19 08:04:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 284 transitions. [2023-11-19 08:04:50,262 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 284 transitions. Word has length 275 [2023-11-19 08:04:50,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:50,262 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 284 transitions. [2023-11-19 08:04:50,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 2 states have call successors, (39) [2023-11-19 08:04:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 284 transitions. [2023-11-19 08:04:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-11-19 08:04:50,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:50,271 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:04:50,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:50,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:04:50,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:50,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:50,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1457704577, now seen corresponding path program 1 times [2023-11-19 08:04:50,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:50,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622154400] [2023-11-19 08:04:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:50,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:50,660 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:50,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546556823] [2023-11-19 08:04:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:50,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:50,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:50,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:50,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:04:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:50,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:04:50,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-19 08:04:51,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:51,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:51,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622154400] [2023-11-19 08:04:51,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:51,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546556823] [2023-11-19 08:04:51,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546556823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:51,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:51,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 08:04:51,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462064247] [2023-11-19 08:04:51,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:51,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:04:51,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:04:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:51,623 INFO L87 Difference]: Start difference. First operand 174 states and 284 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:04:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:53,167 INFO L93 Difference]: Finished difference Result 844 states and 1387 transitions. [2023-11-19 08:04:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:04:53,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 275 [2023-11-19 08:04:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:53,177 INFO L225 Difference]: With dead ends: 844 [2023-11-19 08:04:53,177 INFO L226 Difference]: Without dead ends: 673 [2023-11-19 08:04:53,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:04:53,182 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 648 mSDsluCounter, 2152 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 2768 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:53,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 2768 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 08:04:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2023-11-19 08:04:53,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 416. [2023-11-19 08:04:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 335 states have (on average 1.5820895522388059) internal successors, (530), 335 states have internal predecessors, (530), 78 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-19 08:04:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 686 transitions. [2023-11-19 08:04:53,320 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 686 transitions. Word has length 275 [2023-11-19 08:04:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:53,322 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 686 transitions. [2023-11-19 08:04:53,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:04:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 686 transitions. [2023-11-19 08:04:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-11-19 08:04:53,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:53,331 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:04:53,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:53,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 08:04:53,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:53,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1480336831, now seen corresponding path program 1 times [2023-11-19 08:04:53,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:53,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276894862] [2023-11-19 08:04:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:53,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:53,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:53,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175931577] [2023-11-19 08:04:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:53,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:53,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:53,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:53,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:04:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:53,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:04:53,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-19 08:04:54,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:54,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276894862] [2023-11-19 08:04:54,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:54,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175931577] [2023-11-19 08:04:54,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175931577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:54,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:54,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 08:04:54,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349579411] [2023-11-19 08:04:54,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:54,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:04:54,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:04:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:04:54,460 INFO L87 Difference]: Start difference. First operand 416 states and 686 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:04:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:55,677 INFO L93 Difference]: Finished difference Result 1099 states and 1806 transitions. [2023-11-19 08:04:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:04:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 275 [2023-11-19 08:04:55,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:55,692 INFO L225 Difference]: With dead ends: 1099 [2023-11-19 08:04:55,693 INFO L226 Difference]: Without dead ends: 686 [2023-11-19 08:04:55,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:04:55,699 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 829 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:55,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 1759 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 08:04:55,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-11-19 08:04:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 414. [2023-11-19 08:04:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 333 states have (on average 1.5825825825825826) internal successors, (527), 333 states have internal predecessors, (527), 78 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-19 08:04:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 683 transitions. [2023-11-19 08:04:55,781 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 683 transitions. Word has length 275 [2023-11-19 08:04:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:55,783 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 683 transitions. [2023-11-19 08:04:55,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:04:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 683 transitions. [2023-11-19 08:04:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-19 08:04:55,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:55,791 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:04:55,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:56,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 08:04:56,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:56,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:56,014 INFO L85 PathProgramCache]: Analyzing trace with hash 317734549, now seen corresponding path program 1 times [2023-11-19 08:04:56,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:56,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464502643] [2023-11-19 08:04:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:56,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:56,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:56,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312159064] [2023-11-19 08:04:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:56,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:56,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:56,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:56,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:04:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:56,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:04:56,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-19 08:04:56,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:56,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:56,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464502643] [2023-11-19 08:04:56,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:56,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312159064] [2023-11-19 08:04:56,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312159064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:56,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:56,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:04:56,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014873682] [2023-11-19 08:04:56,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:56,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:56,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:56,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:56,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:56,430 INFO L87 Difference]: Start difference. First operand 414 states and 683 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:04:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:56,777 INFO L93 Difference]: Finished difference Result 1150 states and 1901 transitions. [2023-11-19 08:04:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:04:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 276 [2023-11-19 08:04:56,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:56,784 INFO L225 Difference]: With dead ends: 1150 [2023-11-19 08:04:56,785 INFO L226 Difference]: Without dead ends: 739 [2023-11-19 08:04:56,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 273 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 08:04:56,787 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 412 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:56,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 599 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:04:56,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2023-11-19 08:04:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 735. [2023-11-19 08:04:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 616 states have (on average 1.599025974025974) internal successors, (985), 618 states have internal predecessors, (985), 114 states have call successors, (114), 4 states have call predecessors, (114), 4 states have return successors, (114), 112 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-19 08:04:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1213 transitions. [2023-11-19 08:04:56,873 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1213 transitions. Word has length 276 [2023-11-19 08:04:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:56,874 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1213 transitions. [2023-11-19 08:04:56,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:04:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1213 transitions. [2023-11-19 08:04:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-19 08:04:56,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:56,880 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:04:56,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:57,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:57,096 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:57,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:57,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1003870059, now seen corresponding path program 1 times [2023-11-19 08:04:57,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:57,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083570827] [2023-11-19 08:04:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:57,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:57,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:57,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759338226] [2023-11-19 08:04:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:57,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:57,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:57,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:57,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:04:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:57,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:04:57,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-19 08:04:57,983 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:57,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083570827] [2023-11-19 08:04:57,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:57,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759338226] [2023-11-19 08:04:57,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759338226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:57,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:57,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-19 08:04:57,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604254438] [2023-11-19 08:04:57,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:57,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:04:57,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:04:57,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:04:57,994 INFO L87 Difference]: Start difference. First operand 735 states and 1213 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:04:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:59,336 INFO L93 Difference]: Finished difference Result 3886 states and 6462 transitions. [2023-11-19 08:04:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 08:04:59,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 276 [2023-11-19 08:04:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:59,365 INFO L225 Difference]: With dead ends: 3886 [2023-11-19 08:04:59,365 INFO L226 Difference]: Without dead ends: 3590 [2023-11-19 08:04:59,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2023-11-19 08:04:59,369 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 2498 mSDsluCounter, 2867 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2498 SdHoareTripleChecker+Valid, 3251 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:59,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2498 Valid, 3251 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 08:04:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2023-11-19 08:04:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 2154. [2023-11-19 08:04:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 1808 states have (on average 1.6017699115044248) internal successors, (2896), 1816 states have internal predecessors, (2896), 331 states have call successors, (331), 14 states have call predecessors, (331), 14 states have return successors, (331), 323 states have call predecessors, (331), 331 states have call successors, (331) [2023-11-19 08:04:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 3558 transitions. [2023-11-19 08:04:59,673 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 3558 transitions. Word has length 276 [2023-11-19 08:04:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:59,674 INFO L495 AbstractCegarLoop]: Abstraction has 2154 states and 3558 transitions. [2023-11-19 08:04:59,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:04:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 3558 transitions. [2023-11-19 08:04:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-19 08:04:59,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:59,682 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:04:59,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:59,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:59,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:59,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1144418669, now seen corresponding path program 1 times [2023-11-19 08:04:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781421010] [2023-11-19 08:04:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:59,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:59,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490656410] [2023-11-19 08:04:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:59,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:59,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:59,968 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:59,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:05:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:00,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:05:00,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-19 08:05:00,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:00,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:00,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781421010] [2023-11-19 08:05:00,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:00,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490656410] [2023-11-19 08:05:00,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490656410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:00,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:00,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:05:00,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384842056] [2023-11-19 08:05:00,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:00,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:00,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:00,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:00,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:00,747 INFO L87 Difference]: Start difference. First operand 2154 states and 3558 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:05:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:01,461 INFO L93 Difference]: Finished difference Result 9082 states and 15158 transitions. [2023-11-19 08:05:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:05:01,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 276 [2023-11-19 08:05:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:01,511 INFO L225 Difference]: With dead ends: 9082 [2023-11-19 08:05:01,511 INFO L226 Difference]: Without dead ends: 7022 [2023-11-19 08:05:01,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:05:01,519 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 1124 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:01,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 1298 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:05:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7022 states. [2023-11-19 08:05:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7022 to 2190. [2023-11-19 08:05:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 1844 states have (on average 1.5900216919739696) internal successors, (2932), 1852 states have internal predecessors, (2932), 331 states have call successors, (331), 14 states have call predecessors, (331), 14 states have return successors, (331), 323 states have call predecessors, (331), 331 states have call successors, (331) [2023-11-19 08:05:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3594 transitions. [2023-11-19 08:05:01,899 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3594 transitions. Word has length 276 [2023-11-19 08:05:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:01,900 INFO L495 AbstractCegarLoop]: Abstraction has 2190 states and 3594 transitions. [2023-11-19 08:05:01,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:05:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3594 transitions. [2023-11-19 08:05:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-19 08:05:01,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:01,909 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:01,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:02,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:02,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:02,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:02,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1803950191, now seen corresponding path program 1 times [2023-11-19 08:05:02,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:02,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772466232] [2023-11-19 08:05:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:02,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:02,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:02,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002343847] [2023-11-19 08:05:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:02,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:02,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:02,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:02,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:05:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:02,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 08:05:02,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1679 proven. 57 refuted. 0 times theorem prover too weak. 1228 trivial. 0 not checked. [2023-11-19 08:05:03,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 165 proven. 60 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2023-11-19 08:05:03,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:03,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772466232] [2023-11-19 08:05:03,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:03,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002343847] [2023-11-19 08:05:03,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002343847] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:03,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:05:03,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-11-19 08:05:03,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055975482] [2023-11-19 08:05:03,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:03,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:05:03,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:03,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:05:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:05:03,955 INFO L87 Difference]: Start difference. First operand 2190 states and 3594 transitions. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 6 states have call successors, (78), 4 states have call predecessors, (78), 8 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-11-19 08:05:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:07,521 INFO L93 Difference]: Finished difference Result 13969 states and 22958 transitions. [2023-11-19 08:05:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-19 08:05:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 6 states have call successors, (78), 4 states have call predecessors, (78), 8 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) Word has length 276 [2023-11-19 08:05:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:07,615 INFO L225 Difference]: With dead ends: 13969 [2023-11-19 08:05:07,615 INFO L226 Difference]: Without dead ends: 11873 [2023-11-19 08:05:07,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=643, Invalid=1613, Unknown=0, NotChecked=0, Total=2256 [2023-11-19 08:05:07,625 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 4709 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 942 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4757 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 942 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:07,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4757 Valid, 2000 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [942 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 08:05:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11873 states. [2023-11-19 08:05:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11873 to 6439. [2023-11-19 08:05:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6439 states, 5535 states have (on average 1.5884372177055104) internal successors, (8792), 5563 states have internal predecessors, (8792), 851 states have call successors, (851), 52 states have call predecessors, (851), 52 states have return successors, (851), 823 states have call predecessors, (851), 851 states have call successors, (851) [2023-11-19 08:05:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6439 states to 6439 states and 10494 transitions. [2023-11-19 08:05:08,406 INFO L78 Accepts]: Start accepts. Automaton has 6439 states and 10494 transitions. Word has length 276 [2023-11-19 08:05:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:08,407 INFO L495 AbstractCegarLoop]: Abstraction has 6439 states and 10494 transitions. [2023-11-19 08:05:08,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 6 states have call successors, (78), 4 states have call predecessors, (78), 8 states have return successors, (78), 6 states have call predecessors, (78), 6 states have call successors, (78) [2023-11-19 08:05:08,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6439 states and 10494 transitions. [2023-11-19 08:05:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-11-19 08:05:08,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:08,419 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:08,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:08,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:08,632 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:08,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:08,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1729639256, now seen corresponding path program 1 times [2023-11-19 08:05:08,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:08,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063038865] [2023-11-19 08:05:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:08,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:08,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:08,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700412621] [2023-11-19 08:05:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:08,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:08,692 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:08,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:05:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:09,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:05:09,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-19 08:05:09,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:09,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:09,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063038865] [2023-11-19 08:05:09,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:09,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700412621] [2023-11-19 08:05:09,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700412621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:09,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:09,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 08:05:09,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469404052] [2023-11-19 08:05:09,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:09,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:05:09,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:05:09,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:05:09,573 INFO L87 Difference]: Start difference. First operand 6439 states and 10494 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:05:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:14,336 INFO L93 Difference]: Finished difference Result 59982 states and 99309 transitions. [2023-11-19 08:05:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-19 08:05:14,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 277 [2023-11-19 08:05:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:14,518 INFO L225 Difference]: With dead ends: 59982 [2023-11-19 08:05:14,519 INFO L226 Difference]: Without dead ends: 53662 [2023-11-19 08:05:14,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 08:05:14,546 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 2990 mSDsluCounter, 6093 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2990 SdHoareTripleChecker+Valid, 6567 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:14,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2990 Valid, 6567 Invalid, 1176 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [310 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 08:05:14,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53662 states. [2023-11-19 08:05:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53662 to 16062. [2023-11-19 08:05:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16062 states, 14045 states have (on average 1.6111071555713776) internal successors, (22628), 14121 states have internal predecessors, (22628), 1891 states have call successors, (1891), 125 states have call predecessors, (1891), 125 states have return successors, (1891), 1815 states have call predecessors, (1891), 1891 states have call successors, (1891) [2023-11-19 08:05:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16062 states to 16062 states and 26410 transitions. [2023-11-19 08:05:16,857 INFO L78 Accepts]: Start accepts. Automaton has 16062 states and 26410 transitions. Word has length 277 [2023-11-19 08:05:16,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:16,859 INFO L495 AbstractCegarLoop]: Abstraction has 16062 states and 26410 transitions. [2023-11-19 08:05:16,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:05:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 16062 states and 26410 transitions. [2023-11-19 08:05:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-11-19 08:05:16,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:16,881 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:16,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:17,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:05:17,096 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:17,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash 103338087, now seen corresponding path program 1 times [2023-11-19 08:05:17,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:17,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91386925] [2023-11-19 08:05:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:17,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:17,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:17,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874495092] [2023-11-19 08:05:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:17,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:17,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:17,148 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:17,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:05:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:17,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:05:17,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-19 08:05:17,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:17,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:17,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91386925] [2023-11-19 08:05:17,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:17,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874495092] [2023-11-19 08:05:17,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874495092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:17,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:17,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:05:17,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127123084] [2023-11-19 08:05:17,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:17,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:17,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:17,990 INFO L87 Difference]: Start difference. First operand 16062 states and 26410 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:05:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:20,202 INFO L93 Difference]: Finished difference Result 55938 states and 93207 transitions. [2023-11-19 08:05:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:05:20,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 277 [2023-11-19 08:05:20,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:20,312 INFO L225 Difference]: With dead ends: 55938 [2023-11-19 08:05:20,312 INFO L226 Difference]: Without dead ends: 46090 [2023-11-19 08:05:20,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:05:20,339 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 1113 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:20,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 2504 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 08:05:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46090 states. [2023-11-19 08:05:22,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46090 to 26260. [2023-11-19 08:05:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26260 states, 22987 states have (on average 1.6187845303867403) internal successors, (37211), 23123 states have internal predecessors, (37211), 3083 states have call successors, (3083), 189 states have call predecessors, (3083), 189 states have return successors, (3083), 2947 states have call predecessors, (3083), 3083 states have call successors, (3083) [2023-11-19 08:05:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26260 states to 26260 states and 43377 transitions. [2023-11-19 08:05:22,812 INFO L78 Accepts]: Start accepts. Automaton has 26260 states and 43377 transitions. Word has length 277 [2023-11-19 08:05:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:22,815 INFO L495 AbstractCegarLoop]: Abstraction has 26260 states and 43377 transitions. [2023-11-19 08:05:22,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 1 states have call successors, (39), 1 states have call predecessors, (39), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2023-11-19 08:05:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 26260 states and 43377 transitions. [2023-11-19 08:05:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-11-19 08:05:22,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:22,845 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:05:22,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:23,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:23,075 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:23,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:23,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1742029079, now seen corresponding path program 1 times [2023-11-19 08:05:23,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:23,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374286079] [2023-11-19 08:05:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:23,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:23,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:23,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356093776] [2023-11-19 08:05:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:23,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:23,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:23,147 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:23,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e5f1e23-3c4e-46af-92a5-f4ab14c1b4b7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:05:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:23,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 08:05:23,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1490 proven. 48 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2023-11-19 08:05:24,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 66 proven. 48 refuted. 0 times theorem prover too weak. 2850 trivial. 0 not checked. [2023-11-19 08:05:25,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:25,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374286079] [2023-11-19 08:05:25,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:25,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356093776] [2023-11-19 08:05:25,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356093776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:25,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:05:25,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2023-11-19 08:05:25,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91958901] [2023-11-19 08:05:25,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:25,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 08:05:25,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 08:05:25,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-11-19 08:05:25,749 INFO L87 Difference]: Start difference. First operand 26260 states and 43377 transitions. Second operand has 27 states, 26 states have (on average 5.923076923076923) internal successors, (154), 27 states have internal predecessors, (154), 5 states have call successors, (78), 3 states have call predecessors, (78), 5 states have return successors, (78), 5 states have call predecessors, (78), 5 states have call successors, (78)