./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-29.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/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_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-29.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/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_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/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 e794586f9f3740a193d413dfe816851463e703edc20a79bd19788c3a0505333b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:45:40,837 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:45:40,988 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:45:40,998 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:45:40,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:45:41,039 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:45:41,040 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:45:41,041 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:45:41,042 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:45:41,047 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:45:41,049 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:45:41,049 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:45:41,050 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:45:41,052 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:45:41,052 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:45:41,053 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:45:41,053 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:45:41,054 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:45:41,054 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:45:41,055 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:45:41,055 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:45:41,056 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:45:41,056 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:45:41,057 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:45:41,057 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:45:41,058 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:45:41,059 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:45:41,059 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:45:41,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:41,060 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:45:41,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:45:41,062 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:45:41,062 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:45:41,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:45:41,063 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:45:41,063 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:45:41,063 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:45:41,064 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:45:41,064 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:45:41,064 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_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e794586f9f3740a193d413dfe816851463e703edc20a79bd19788c3a0505333b [2023-11-19 07:45:41,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:45:41,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:45:41,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:45:41,397 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:45:41,398 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:45:41,399 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-29.i [2023-11-19 07:45:44,548 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:45:44,880 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:45:44,881 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-29.i [2023-11-19 07:45:44,902 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/data/4a61893a3/47242cde26f445519a381cdd025738e0/FLAG8fdb9bea8 [2023-11-19 07:45:44,916 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/data/4a61893a3/47242cde26f445519a381cdd025738e0 [2023-11-19 07:45:44,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:45:44,920 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:45:44,922 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:44,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:45:44,930 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:45:44,931 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:44" (1/1) ... [2023-11-19 07:45:44,932 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff1ff7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:44, skipping insertion in model container [2023-11-19 07:45:44,933 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:44" (1/1) ... [2023-11-19 07:45:44,993 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:45:45,188 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_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-29.i[916,929] [2023-11-19 07:45:45,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:45,392 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:45:45,417 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_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-29.i[916,929] [2023-11-19 07:45:45,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:45,562 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:45:45,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45 WrapperNode [2023-11-19 07:45:45,564 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:45,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:45,566 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:45:45,566 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:45:45,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,600 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,689 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 411 [2023-11-19 07:45:45,689 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:45,690 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:45:45,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:45:45,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:45:45,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,724 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,724 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,772 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,789 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:45:45,826 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:45:45,826 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:45:45,827 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:45:45,828 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (1/1) ... [2023-11-19 07:45:45,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:45,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:45,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:45:45,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:45:45,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:45:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:45:45,922 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:45:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:45:45,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:45:45,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:45:46,085 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:45:46,088 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:45:47,035 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:45:47,046 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:45:47,046 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:45:47,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:47 BoogieIcfgContainer [2023-11-19 07:45:47,052 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:45:47,054 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:45:47,054 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:45:47,058 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:45:47,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:45:44" (1/3) ... [2023-11-19 07:45:47,059 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8899c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:47, skipping insertion in model container [2023-11-19 07:45:47,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:45" (2/3) ... [2023-11-19 07:45:47,060 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8899c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:47, skipping insertion in model container [2023-11-19 07:45:47,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:47" (3/3) ... [2023-11-19 07:45:47,062 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-29.i [2023-11-19 07:45:47,089 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:45:47,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:45:47,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:45:47,173 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;@6ecce620, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:45:47,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:45:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 117 states have (on average 1.4871794871794872) internal successors, (174), 118 states have internal predecessors, (174), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-19 07:45:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-11-19 07:45:47,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:47,236 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:47,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:47,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:47,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1497187027, now seen corresponding path program 1 times [2023-11-19 07:45:47,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:47,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154986783] [2023-11-19 07:45:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:47,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:47,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154986783] [2023-11-19 07:45:47,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:45:47,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196197322] [2023-11-19 07:45:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:47,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:47,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:45:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:48,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:45:48,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2023-11-19 07:45:48,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:48,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196197322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:48,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:48,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:45:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512732001] [2023-11-19 07:45:48,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:48,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:45:48,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:48,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:45:48,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:45:48,409 INFO L87 Difference]: Start difference. First operand has 175 states, 117 states have (on average 1.4871794871794872) internal successors, (174), 118 states have internal predecessors, (174), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-19 07:45:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:48,469 INFO L93 Difference]: Finished difference Result 343 states and 617 transitions. [2023-11-19 07:45:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:45:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) Word has length 360 [2023-11-19 07:45:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:48,483 INFO L225 Difference]: With dead ends: 343 [2023-11-19 07:45:48,484 INFO L226 Difference]: Without dead ends: 171 [2023-11-19 07:45:48,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:45:48,497 INFO L413 NwaCegarLoop]: 277 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, 277 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:48,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:45:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-19 07:45:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-11-19 07:45:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 114 states have (on average 1.4649122807017543) internal successors, (167), 114 states have internal predecessors, (167), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-19 07:45:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 277 transitions. [2023-11-19 07:45:48,579 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 277 transitions. Word has length 360 [2023-11-19 07:45:48,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:48,579 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 277 transitions. [2023-11-19 07:45:48,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-19 07:45:48,580 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 277 transitions. [2023-11-19 07:45:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-11-19 07:45:48,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:48,589 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:48,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:48,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:48,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:48,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash -579237445, now seen corresponding path program 1 times [2023-11-19 07:45:48,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:48,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595969540] [2023-11-19 07:45:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:48,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:48,968 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:48,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114654854] [2023-11-19 07:45:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:48,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:48,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:48,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:49,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:45:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:49,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:45:49,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-19 07:45:50,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:50,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:50,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595969540] [2023-11-19 07:45:50,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:50,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114654854] [2023-11-19 07:45:50,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114654854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:50,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:50,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:45:50,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694578685] [2023-11-19 07:45:50,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:50,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:45:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:45:50,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:45:50,137 INFO L87 Difference]: Start difference. First operand 171 states and 277 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-19 07:45:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:50,313 INFO L93 Difference]: Finished difference Result 507 states and 825 transitions. [2023-11-19 07:45:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:45:50,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 360 [2023-11-19 07:45:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:50,329 INFO L225 Difference]: With dead ends: 507 [2023-11-19 07:45:50,330 INFO L226 Difference]: Without dead ends: 339 [2023-11-19 07:45:50,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 357 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 07:45:50,334 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 184 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:50,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 802 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:45:50,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-11-19 07:45:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2023-11-19 07:45:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 224 states have (on average 1.46875) internal successors, (329), 224 states have internal predecessors, (329), 110 states have call successors, (110), 2 states have call predecessors, (110), 2 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2023-11-19 07:45:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 549 transitions. [2023-11-19 07:45:50,462 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 549 transitions. Word has length 360 [2023-11-19 07:45:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:50,465 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 549 transitions. [2023-11-19 07:45:50,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-19 07:45:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 549 transitions. [2023-11-19 07:45:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-11-19 07:45:50,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:50,476 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:50,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:50,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:50,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:50,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1423242947, now seen corresponding path program 1 times [2023-11-19 07:45:50,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:50,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394480492] [2023-11-19 07:45:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:50,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:50,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684859629] [2023-11-19 07:45:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:50,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:50,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:50,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:50,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:45:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:51,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:45:51,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2496 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-19 07:45:52,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:52,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:52,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394480492] [2023-11-19 07:45:52,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:52,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684859629] [2023-11-19 07:45:52,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684859629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:52,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:52,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:45:52,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117828552] [2023-11-19 07:45:52,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:52,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:45:52,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:52,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:45:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:45:52,302 INFO L87 Difference]: Start difference. First operand 337 states and 549 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-19 07:45:52,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:52,779 INFO L93 Difference]: Finished difference Result 1007 states and 1645 transitions. [2023-11-19 07:45:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:45:52,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 360 [2023-11-19 07:45:52,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:52,788 INFO L225 Difference]: With dead ends: 1007 [2023-11-19 07:45:52,788 INFO L226 Difference]: Without dead ends: 673 [2023-11-19 07:45:52,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:45:52,792 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 202 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:52,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1132 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:45:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2023-11-19 07:45:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 671. [2023-11-19 07:45:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 446 states have (on average 1.4708520179372198) internal successors, (656), 446 states have internal predecessors, (656), 220 states have call successors, (220), 4 states have call predecessors, (220), 4 states have return successors, (220), 220 states have call predecessors, (220), 220 states have call successors, (220) [2023-11-19 07:45:52,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1096 transitions. [2023-11-19 07:45:52,929 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1096 transitions. Word has length 360 [2023-11-19 07:45:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:52,931 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 1096 transitions. [2023-11-19 07:45:52,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-19 07:45:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1096 transitions. [2023-11-19 07:45:52,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-11-19 07:45:52,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:52,940 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:52,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:53,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:53,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:53,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:53,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1282694337, now seen corresponding path program 1 times [2023-11-19 07:45:53,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:53,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917066815] [2023-11-19 07:45:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:53,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:53,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:53,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647317037] [2023-11-19 07:45:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:53,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:53,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:53,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:53,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:45:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:53,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:45:53,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-19 07:45:53,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:53,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:53,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917066815] [2023-11-19 07:45:53,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:53,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647317037] [2023-11-19 07:45:53,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647317037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:53,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:53,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:45:53,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459623077] [2023-11-19 07:45:53,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:53,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:53,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:53,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:53,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:53,668 INFO L87 Difference]: Start difference. First operand 671 states and 1096 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-19 07:45:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:53,748 INFO L93 Difference]: Finished difference Result 1619 states and 2634 transitions. [2023-11-19 07:45:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 360 [2023-11-19 07:45:53,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:53,757 INFO L225 Difference]: With dead ends: 1619 [2023-11-19 07:45:53,758 INFO L226 Difference]: Without dead ends: 951 [2023-11-19 07:45:53,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:53,764 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 99 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:53,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 615 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:45:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2023-11-19 07:45:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 945. [2023-11-19 07:45:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 708 states have (on average 1.5197740112994351) internal successors, (1076), 712 states have internal predecessors, (1076), 228 states have call successors, (228), 8 states have call predecessors, (228), 8 states have return successors, (228), 224 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-19 07:45:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1532 transitions. [2023-11-19 07:45:53,888 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1532 transitions. Word has length 360 [2023-11-19 07:45:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:53,889 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1532 transitions. [2023-11-19 07:45:53,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-19 07:45:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1532 transitions. [2023-11-19 07:45:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-11-19 07:45:53,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:53,898 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:53,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:54,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:54,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:54,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:54,126 INFO L85 PathProgramCache]: Analyzing trace with hash -859047615, now seen corresponding path program 1 times [2023-11-19 07:45:54,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:54,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440990934] [2023-11-19 07:45:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:54,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:54,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:54,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139280055] [2023-11-19 07:45:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:54,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:54,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:54,204 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:54,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:45:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:54,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:45:54,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2032 proven. 33 refuted. 0 times theorem prover too weak. 3875 trivial. 0 not checked. [2023-11-19 07:45:54,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 129 proven. 33 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2023-11-19 07:45:55,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440990934] [2023-11-19 07:45:55,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139280055] [2023-11-19 07:45:55,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139280055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:55,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:45:55,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-19 07:45:55,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136643171] [2023-11-19 07:45:55,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:55,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:45:55,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:55,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:45:55,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:45:55,389 INFO L87 Difference]: Start difference. First operand 945 states and 1532 transitions. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 2 states have call successors, (66), 2 states have call predecessors, (66), 4 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-19 07:45:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:57,493 INFO L93 Difference]: Finished difference Result 3891 states and 6246 transitions. [2023-11-19 07:45:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:45:57,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 2 states have call successors, (66), 2 states have call predecessors, (66), 4 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) Word has length 360 [2023-11-19 07:45:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:57,521 INFO L225 Difference]: With dead ends: 3891 [2023-11-19 07:45:57,521 INFO L226 Difference]: Without dead ends: 2949 [2023-11-19 07:45:57,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 709 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:45:57,529 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 1379 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:57,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1467 Valid, 1421 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-19 07:45:57,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2023-11-19 07:45:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 1262. [2023-11-19 07:45:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 918 states have (on average 1.491285403050109) internal successors, (1369), 925 states have internal predecessors, (1369), 328 states have call successors, (328), 15 states have call predecessors, (328), 15 states have return successors, (328), 321 states have call predecessors, (328), 328 states have call successors, (328) [2023-11-19 07:45:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 2025 transitions. [2023-11-19 07:45:57,882 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 2025 transitions. Word has length 360 [2023-11-19 07:45:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:57,883 INFO L495 AbstractCegarLoop]: Abstraction has 1262 states and 2025 transitions. [2023-11-19 07:45:57,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 2 states have call successors, (66), 2 states have call predecessors, (66), 4 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-19 07:45:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 2025 transitions. [2023-11-19 07:45:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-11-19 07:45:57,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:57,893 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:57,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:58,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:58,118 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:58,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:58,118 INFO L85 PathProgramCache]: Analyzing trace with hash -436345789, now seen corresponding path program 1 times [2023-11-19 07:45:58,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:58,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740788586] [2023-11-19 07:45:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:58,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:58,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:58,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298318059] [2023-11-19 07:45:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:58,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:58,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:58,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:58,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:45:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:58,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:45:58,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 3805 proven. 273 refuted. 0 times theorem prover too weak. 1862 trivial. 0 not checked. [2023-11-19 07:45:59,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 195 proven. 282 refuted. 0 times theorem prover too weak. 5463 trivial. 0 not checked. [2023-11-19 07:46:00,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:00,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740788586] [2023-11-19 07:46:00,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:00,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298318059] [2023-11-19 07:46:00,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298318059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:00,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:46:00,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-11-19 07:46:00,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456855654] [2023-11-19 07:46:00,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:00,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 07:46:00,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:00,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 07:46:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:46:00,919 INFO L87 Difference]: Start difference. First operand 1262 states and 2025 transitions. Second operand has 26 states, 24 states have (on average 6.666666666666667) internal successors, (160), 24 states have internal predecessors, (160), 9 states have call successors, (91), 5 states have call predecessors, (91), 9 states have return successors, (92), 7 states have call predecessors, (92), 9 states have call successors, (92) [2023-11-19 07:46:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:04,524 INFO L93 Difference]: Finished difference Result 5586 states and 8634 transitions. [2023-11-19 07:46:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-19 07:46:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 6.666666666666667) internal successors, (160), 24 states have internal predecessors, (160), 9 states have call successors, (91), 5 states have call predecessors, (91), 9 states have return successors, (92), 7 states have call predecessors, (92), 9 states have call successors, (92) Word has length 360 [2023-11-19 07:46:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:04,558 INFO L225 Difference]: With dead ends: 5586 [2023-11-19 07:46:04,558 INFO L226 Difference]: Without dead ends: 4396 [2023-11-19 07:46:04,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 700 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2230 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1773, Invalid=5199, Unknown=0, NotChecked=0, Total=6972 [2023-11-19 07:46:04,567 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 2097 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2115 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:04,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2115 Valid, 1531 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 1363 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 07:46:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4396 states. [2023-11-19 07:46:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4396 to 2367. [2023-11-19 07:46:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 1899 states have (on average 1.5134281200631912) internal successors, (2874), 1916 states have internal predecessors, (2874), 418 states have call successors, (418), 49 states have call predecessors, (418), 49 states have return successors, (418), 401 states have call predecessors, (418), 418 states have call successors, (418) [2023-11-19 07:46:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 3710 transitions. [2023-11-19 07:46:05,039 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 3710 transitions. Word has length 360 [2023-11-19 07:46:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:05,041 INFO L495 AbstractCegarLoop]: Abstraction has 2367 states and 3710 transitions. [2023-11-19 07:46:05,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 6.666666666666667) internal successors, (160), 24 states have internal predecessors, (160), 9 states have call successors, (91), 5 states have call predecessors, (91), 9 states have return successors, (92), 7 states have call predecessors, (92), 9 states have call successors, (92) [2023-11-19 07:46:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 3710 transitions. [2023-11-19 07:46:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2023-11-19 07:46:05,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:05,051 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:05,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:05,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:05,269 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:05,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:05,270 INFO L85 PathProgramCache]: Analyzing trace with hash -937556611, now seen corresponding path program 1 times [2023-11-19 07:46:05,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:05,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99422055] [2023-11-19 07:46:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:05,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:05,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:05,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226155478] [2023-11-19 07:46:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:05,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:05,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:05,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:05,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:46:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:05,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:46:05,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 4034 proven. 102 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2023-11-19 07:46:07,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 108 proven. 54 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2023-11-19 07:46:08,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:08,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99422055] [2023-11-19 07:46:08,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:08,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226155478] [2023-11-19 07:46:08,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226155478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:08,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:46:08,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2023-11-19 07:46:08,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085028594] [2023-11-19 07:46:08,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:08,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:46:08,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:08,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:46:08,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:46:08,237 INFO L87 Difference]: Start difference. First operand 2367 states and 3710 transitions. Second operand has 19 states, 19 states have (on average 9.421052631578947) internal successors, (179), 18 states have internal predecessors, (179), 6 states have call successors, (110), 5 states have call predecessors, (110), 7 states have return successors, (110), 6 states have call predecessors, (110), 6 states have call successors, (110) [2023-11-19 07:46:11,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:11,512 INFO L93 Difference]: Finished difference Result 11613 states and 18191 transitions. [2023-11-19 07:46:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:46:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 9.421052631578947) internal successors, (179), 18 states have internal predecessors, (179), 6 states have call successors, (110), 5 states have call predecessors, (110), 7 states have return successors, (110), 6 states have call predecessors, (110), 6 states have call successors, (110) Word has length 360 [2023-11-19 07:46:11,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:11,583 INFO L225 Difference]: With dead ends: 11613 [2023-11-19 07:46:11,583 INFO L226 Difference]: Without dead ends: 9334 [2023-11-19 07:46:11,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:46:11,592 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 981 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1833 SdHoareTripleChecker+Invalid, 2342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:11,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 1833 Invalid, 2342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-19 07:46:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9334 states. [2023-11-19 07:46:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9334 to 7431. [2023-11-19 07:46:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7431 states, 6279 states have (on average 1.5269947443860488) internal successors, (9588), 6332 states have internal predecessors, (9588), 1014 states have call successors, (1014), 137 states have call predecessors, (1014), 137 states have return successors, (1014), 961 states have call predecessors, (1014), 1014 states have call successors, (1014) [2023-11-19 07:46:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7431 states to 7431 states and 11616 transitions. [2023-11-19 07:46:12,540 INFO L78 Accepts]: Start accepts. Automaton has 7431 states and 11616 transitions. Word has length 360 [2023-11-19 07:46:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:12,541 INFO L495 AbstractCegarLoop]: Abstraction has 7431 states and 11616 transitions. [2023-11-19 07:46:12,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.421052631578947) internal successors, (179), 18 states have internal predecessors, (179), 6 states have call successors, (110), 5 states have call predecessors, (110), 7 states have return successors, (110), 6 states have call predecessors, (110), 6 states have call successors, (110) [2023-11-19 07:46:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 7431 states and 11616 transitions. [2023-11-19 07:46:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2023-11-19 07:46:12,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:12,550 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:12,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:12,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:12,765 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:12,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash -914819381, now seen corresponding path program 1 times [2023-11-19 07:46:12,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:12,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052720191] [2023-11-19 07:46:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:12,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:12,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:12,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546621480] [2023-11-19 07:46:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:12,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:12,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:12,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:12,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:46:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:13,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:46:13,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2496 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-19 07:46:16,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:16,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:16,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052720191] [2023-11-19 07:46:16,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:16,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546621480] [2023-11-19 07:46:16,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546621480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:16,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:16,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:46:16,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518349698] [2023-11-19 07:46:16,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:16,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:46:16,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:16,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:46:16,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:46:16,557 INFO L87 Difference]: Start difference. First operand 7431 states and 11616 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-19 07:46:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:18,665 INFO L93 Difference]: Finished difference Result 21603 states and 33603 transitions. [2023-11-19 07:46:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:46:18,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 361 [2023-11-19 07:46:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:18,733 INFO L225 Difference]: With dead ends: 21603 [2023-11-19 07:46:18,733 INFO L226 Difference]: Without dead ends: 14268 [2023-11-19 07:46:18,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:46:18,753 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1388 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:18,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1388 Valid, 893 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:46:18,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14268 states. [2023-11-19 07:46:20,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14268 to 11314. [2023-11-19 07:46:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11314 states, 9568 states have (on average 1.5166178929765886) internal successors, (14511), 9639 states have internal predecessors, (14511), 1524 states have call successors, (1524), 221 states have call predecessors, (1524), 221 states have return successors, (1524), 1453 states have call predecessors, (1524), 1524 states have call successors, (1524) [2023-11-19 07:46:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11314 states to 11314 states and 17559 transitions. [2023-11-19 07:46:20,299 INFO L78 Accepts]: Start accepts. Automaton has 11314 states and 17559 transitions. Word has length 361 [2023-11-19 07:46:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:20,300 INFO L495 AbstractCegarLoop]: Abstraction has 11314 states and 17559 transitions. [2023-11-19 07:46:20,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-19 07:46:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 11314 states and 17559 transitions. [2023-11-19 07:46:20,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2023-11-19 07:46:20,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:20,319 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:20,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:20,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:46:20,528 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:20,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash -606363217, now seen corresponding path program 1 times [2023-11-19 07:46:20,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:20,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866710233] [2023-11-19 07:46:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:20,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:20,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:20,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639739186] [2023-11-19 07:46:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:20,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:20,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:20,629 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:20,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11672262-5cf3-4442-9c0e-4c5b7c12ed8a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:46:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:21,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-19 07:46:21,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 4219 proven. 201 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2023-11-19 07:46:23,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 153 proven. 9 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2023-11-19 07:46:25,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:25,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866710233] [2023-11-19 07:46:25,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:25,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639739186] [2023-11-19 07:46:25,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639739186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:25,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:46:25,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 30 [2023-11-19 07:46:25,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343024800] [2023-11-19 07:46:25,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:25,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 07:46:25,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:25,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 07:46:25,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:46:25,538 INFO L87 Difference]: Start difference. First operand 11314 states and 17559 transitions. Second operand has 30 states, 30 states have (on average 6.433333333333334) internal successors, (193), 28 states have internal predecessors, (193), 8 states have call successors, (110), 7 states have call predecessors, (110), 11 states have return successors, (110), 8 states have call predecessors, (110), 8 states have call successors, (110)