./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/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_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/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_1d828d88-cfe3-4076-90ad-47d897f1fc8f/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 2130977652141f87aaeab3d55d3a6ad4866e75f526c9ed5f7fd20a11fd2ef6f1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:17,977 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:18,059 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:55:18,066 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:18,067 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:18,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:18,097 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:18,098 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:18,099 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:18,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:18,101 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:18,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:18,102 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:18,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:18,104 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:55:18,105 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:18,105 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:18,106 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:18,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:18,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:55:18,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:18,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:55:18,115 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:18,116 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:18,116 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:18,117 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:18,118 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:18,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:18,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:18,119 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:18,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:18,121 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:55:18,122 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:18,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:18,122 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:18,122 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:55:18,123 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:18,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:18,123 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:18,124 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_1d828d88-cfe3-4076-90ad-47d897f1fc8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2130977652141f87aaeab3d55d3a6ad4866e75f526c9ed5f7fd20a11fd2ef6f1 [2023-11-19 07:55:18,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:18,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:18,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:18,489 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:18,491 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:18,493 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-10.i [2023-11-19 07:55:21,647 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:22,015 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:22,016 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-10.i [2023-11-19 07:55:22,032 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/data/732777969/0378c94342c94baaa0b661537821d79f/FLAG1d92f7669 [2023-11-19 07:55:22,052 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/data/732777969/0378c94342c94baaa0b661537821d79f [2023-11-19 07:55:22,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:22,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:22,067 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:22,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:22,073 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:22,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,074 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@269499d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22, skipping insertion in model container [2023-11-19 07:55:22,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,158 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:22,316 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_1d828d88-cfe3-4076-90ad-47d897f1fc8f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-10.i[916,929] [2023-11-19 07:55:22,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:22,541 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:22,554 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_1d828d88-cfe3-4076-90ad-47d897f1fc8f/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-10.i[916,929] [2023-11-19 07:55:22,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:22,654 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:22,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22 WrapperNode [2023-11-19 07:55:22,655 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:22,656 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:22,657 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:22,657 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:22,674 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,707 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,838 INFO L138 Inliner]: procedures = 26, calls = 78, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 483 [2023-11-19 07:55:22,839 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:22,840 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:22,840 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:22,841 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:22,851 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,888 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,889 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,944 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,955 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,976 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:22,990 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:23,002 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:23,003 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:23,003 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:23,004 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:23,004 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (1/1) ... [2023-11-19 07:55:23,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:23,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:23,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:23,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:55:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:55:23,083 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:55:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:55:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:23,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:23,240 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:23,242 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:24,218 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:24,238 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:24,239 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:55:24,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:24 BoogieIcfgContainer [2023-11-19 07:55:24,253 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:24,257 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:55:24,258 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:55:24,261 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:55:24,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:22" (1/3) ... [2023-11-19 07:55:24,262 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e175a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:24, skipping insertion in model container [2023-11-19 07:55:24,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:22" (2/3) ... [2023-11-19 07:55:24,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e175a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:24, skipping insertion in model container [2023-11-19 07:55:24,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:24" (3/3) ... [2023-11-19 07:55:24,266 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-10.i [2023-11-19 07:55:24,291 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:55:24,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:55:24,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:24,361 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;@460aa4f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:24,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:55:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 127 states have (on average 1.4724409448818898) internal successors, (187), 128 states have internal predecessors, (187), 65 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-19 07:55:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2023-11-19 07:55:24,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:24,398 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:24,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:24,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash 657731709, now seen corresponding path program 1 times [2023-11-19 07:55:24,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:24,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601135164] [2023-11-19 07:55:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:24,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:24,763 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:24,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482075348] [2023-11-19 07:55:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:24,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:24,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:24,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:24,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:55:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:25,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:55:25,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-19 07:55:25,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:25,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:25,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601135164] [2023-11-19 07:55:25,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:25,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482075348] [2023-11-19 07:55:25,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482075348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:25,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:25,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:25,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971124107] [2023-11-19 07:55:25,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:25,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:25,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:25,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:25,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:25,502 INFO L87 Difference]: Start difference. First operand has 195 states, 127 states have (on average 1.4724409448818898) internal successors, (187), 128 states have internal predecessors, (187), 65 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:55:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:25,764 INFO L93 Difference]: Finished difference Result 570 states and 1067 transitions. [2023-11-19 07:55:25,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:25,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 411 [2023-11-19 07:55:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:25,800 INFO L225 Difference]: With dead ends: 570 [2023-11-19 07:55:25,801 INFO L226 Difference]: Without dead ends: 378 [2023-11-19 07:55:25,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 409 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 07:55:25,812 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 284 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:25,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 857 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:55:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-19 07:55:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2023-11-19 07:55:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 243 states have (on average 1.448559670781893) internal successors, (352), 243 states have internal predecessors, (352), 130 states have call successors, (130), 2 states have call predecessors, (130), 2 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 07:55:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 612 transitions. [2023-11-19 07:55:25,993 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 612 transitions. Word has length 411 [2023-11-19 07:55:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:25,996 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 612 transitions. [2023-11-19 07:55:25,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:55:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 612 transitions. [2023-11-19 07:55:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2023-11-19 07:55:26,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:26,012 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:26,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:26,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:55:26,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:26,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:26,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1391656133, now seen corresponding path program 1 times [2023-11-19 07:55:26,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:26,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743678843] [2023-11-19 07:55:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:26,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:26,423 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:26,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030683281] [2023-11-19 07:55:26,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:26,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:26,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:26,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:26,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:55:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:26,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:55:26,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-19 07:55:28,646 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:28,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:28,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743678843] [2023-11-19 07:55:28,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:28,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030683281] [2023-11-19 07:55:28,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030683281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:28,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:28,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:28,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287685666] [2023-11-19 07:55:28,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:28,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:28,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:28,653 INFO L87 Difference]: Start difference. First operand 376 states and 612 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:55:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:28,749 INFO L93 Difference]: Finished difference Result 746 states and 1216 transitions. [2023-11-19 07:55:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:28,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 411 [2023-11-19 07:55:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:28,759 INFO L225 Difference]: With dead ends: 746 [2023-11-19 07:55:28,759 INFO L226 Difference]: Without dead ends: 373 [2023-11-19 07:55:28,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:28,763 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 108 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:28,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 299 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:55:28,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-19 07:55:28,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 221. [2023-11-19 07:55:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 154 states have (on average 1.4805194805194806) internal successors, (228), 154 states have internal predecessors, (228), 65 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-19 07:55:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 358 transitions. [2023-11-19 07:55:28,826 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 358 transitions. Word has length 411 [2023-11-19 07:55:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:28,828 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 358 transitions. [2023-11-19 07:55:28,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:55:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 358 transitions. [2023-11-19 07:55:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2023-11-19 07:55:28,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:28,840 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:28,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:29,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:29,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:29,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:29,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1057221556, now seen corresponding path program 1 times [2023-11-19 07:55:29,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:29,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799319381] [2023-11-19 07:55:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:29,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:29,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:29,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793021455] [2023-11-19 07:55:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:29,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:29,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:29,249 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:29,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:29,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:55:29,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 64 proven. 192 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-19 07:55:30,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:55:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799319381] [2023-11-19 07:55:30,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793021455] [2023-11-19 07:55:30,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793021455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:30,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:30,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2023-11-19 07:55:30,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87722314] [2023-11-19 07:55:30,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:30,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:55:30,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:55:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:55:30,966 INFO L87 Difference]: Start difference. First operand 221 states and 358 transitions. Second operand has 14 states, 14 states have (on average 10.785714285714286) internal successors, (151), 14 states have internal predecessors, (151), 3 states have call successors, (129), 2 states have call predecessors, (129), 4 states have return successors, (130), 2 states have call predecessors, (130), 3 states have call successors, (130) [2023-11-19 07:55:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:33,343 INFO L93 Difference]: Finished difference Result 703 states and 1133 transitions. [2023-11-19 07:55:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:55:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.785714285714286) internal successors, (151), 14 states have internal predecessors, (151), 3 states have call successors, (129), 2 states have call predecessors, (129), 4 states have return successors, (130), 2 states have call predecessors, (130), 3 states have call successors, (130) Word has length 412 [2023-11-19 07:55:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:33,349 INFO L225 Difference]: With dead ends: 703 [2023-11-19 07:55:33,349 INFO L226 Difference]: Without dead ends: 485 [2023-11-19 07:55:33,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 811 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:55:33,352 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 427 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:33,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 1770 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 07:55:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-11-19 07:55:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 445. [2023-11-19 07:55:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 310 states have (on average 1.4580645161290322) internal successors, (452), 310 states have internal predecessors, (452), 130 states have call successors, (130), 4 states have call predecessors, (130), 4 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 07:55:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 712 transitions. [2023-11-19 07:55:33,454 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 712 transitions. Word has length 412 [2023-11-19 07:55:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:33,455 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 712 transitions. [2023-11-19 07:55:33,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.785714285714286) internal successors, (151), 14 states have internal predecessors, (151), 3 states have call successors, (129), 2 states have call predecessors, (129), 4 states have return successors, (130), 2 states have call predecessors, (130), 3 states have call successors, (130) [2023-11-19 07:55:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 712 transitions. [2023-11-19 07:55:33,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2023-11-19 07:55:33,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:33,466 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:33,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:33,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:33,690 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:33,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:33,690 INFO L85 PathProgramCache]: Analyzing trace with hash 993762442, now seen corresponding path program 1 times [2023-11-19 07:55:33,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:33,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791929683] [2023-11-19 07:55:33,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:33,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:33,795 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:33,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975173846] [2023-11-19 07:55:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:33,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:33,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:33,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:33,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:34,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:34,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 1032 proven. 180 refuted. 0 times theorem prover too weak. 7108 trivial. 0 not checked. [2023-11-19 07:55:34,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:55:35,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791929683] [2023-11-19 07:55:35,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975173846] [2023-11-19 07:55:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975173846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:35,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:35,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:55:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007946546] [2023-11-19 07:55:35,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:35,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:35,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:35,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:35,238 INFO L87 Difference]: Start difference. First operand 445 states and 712 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) [2023-11-19 07:55:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:35,729 INFO L93 Difference]: Finished difference Result 897 states and 1427 transitions. [2023-11-19 07:55:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:55:35,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) Word has length 412 [2023-11-19 07:55:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:35,735 INFO L225 Difference]: With dead ends: 897 [2023-11-19 07:55:35,736 INFO L226 Difference]: Without dead ends: 455 [2023-11-19 07:55:35,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 816 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:55:35,743 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 303 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:35,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 535 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:55:35,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-11-19 07:55:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 451. [2023-11-19 07:55:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 314 states have (on average 1.4394904458598725) internal successors, (452), 314 states have internal predecessors, (452), 130 states have call successors, (130), 6 states have call predecessors, (130), 6 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 07:55:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 712 transitions. [2023-11-19 07:55:35,832 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 712 transitions. Word has length 412 [2023-11-19 07:55:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:35,834 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 712 transitions. [2023-11-19 07:55:35,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) [2023-11-19 07:55:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 712 transitions. [2023-11-19 07:55:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2023-11-19 07:55:35,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:35,840 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:35,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:36,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:36,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:36,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 535715210, now seen corresponding path program 1 times [2023-11-19 07:55:36,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:36,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062500765] [2023-11-19 07:55:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:36,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:36,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:36,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385652429] [2023-11-19 07:55:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:36,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:36,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:36,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:36,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:55:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:36,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:36,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 4068 proven. 114 refuted. 0 times theorem prover too weak. 4138 trivial. 0 not checked. [2023-11-19 07:55:36,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 78 proven. 114 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:55:37,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:37,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062500765] [2023-11-19 07:55:37,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:37,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385652429] [2023-11-19 07:55:37,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385652429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:37,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:37,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:55:37,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577435764] [2023-11-19 07:55:37,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:37,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:55:37,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:37,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:55:37,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:55:37,312 INFO L87 Difference]: Start difference. First operand 451 states and 712 transitions. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2023-11-19 07:55:37,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:37,846 INFO L93 Difference]: Finished difference Result 911 states and 1431 transitions. [2023-11-19 07:55:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:55:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 412 [2023-11-19 07:55:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:37,882 INFO L225 Difference]: With dead ends: 911 [2023-11-19 07:55:37,882 INFO L226 Difference]: Without dead ends: 463 [2023-11-19 07:55:37,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 816 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:55:37,884 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 418 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:37,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 547 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:55:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-19 07:55:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 459. [2023-11-19 07:55:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 320 states have (on average 1.41875) internal successors, (454), 320 states have internal predecessors, (454), 130 states have call successors, (130), 8 states have call predecessors, (130), 8 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 07:55:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 714 transitions. [2023-11-19 07:55:37,965 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 714 transitions. Word has length 412 [2023-11-19 07:55:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:37,966 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 714 transitions. [2023-11-19 07:55:37,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2023-11-19 07:55:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 714 transitions. [2023-11-19 07:55:37,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2023-11-19 07:55:37,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:37,971 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:38,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 07:55:38,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:38,195 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:38,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:38,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1779185384, now seen corresponding path program 1 times [2023-11-19 07:55:38,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:38,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938914121] [2023-11-19 07:55:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:38,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:38,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:38,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561676266] [2023-11-19 07:55:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:38,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:38,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:38,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:38,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:55:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:38,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:55:38,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 2195 proven. 45 refuted. 0 times theorem prover too weak. 6080 trivial. 0 not checked. [2023-11-19 07:55:39,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 333 proven. 48 refuted. 0 times theorem prover too weak. 7939 trivial. 0 not checked. [2023-11-19 07:55:40,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:40,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938914121] [2023-11-19 07:55:40,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:40,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561676266] [2023-11-19 07:55:40,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561676266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:40,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:40,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2023-11-19 07:55:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794173319] [2023-11-19 07:55:40,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:40,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:55:40,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:40,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:55:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:55:40,725 INFO L87 Difference]: Start difference. First operand 459 states and 714 transitions. Second operand has 22 states, 22 states have (on average 8.363636363636363) internal successors, (184), 22 states have internal predecessors, (184), 6 states have call successors, (130), 4 states have call predecessors, (130), 8 states have return successors, (130), 6 states have call predecessors, (130), 6 states have call successors, (130) [2023-11-19 07:55:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:44,393 INFO L93 Difference]: Finished difference Result 1881 states and 2850 transitions. [2023-11-19 07:55:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-19 07:55:44,395 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.363636363636363) internal successors, (184), 22 states have internal predecessors, (184), 6 states have call successors, (130), 4 states have call predecessors, (130), 8 states have return successors, (130), 6 states have call predecessors, (130), 6 states have call successors, (130) Word has length 413 [2023-11-19 07:55:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:44,406 INFO L225 Difference]: With dead ends: 1881 [2023-11-19 07:55:44,406 INFO L226 Difference]: Without dead ends: 1425 [2023-11-19 07:55:44,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 808 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=763, Invalid=1787, Unknown=0, NotChecked=0, Total=2550 [2023-11-19 07:55:44,410 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 2824 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 2188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2836 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2188 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:44,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2836 Valid, 1133 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2188 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 07:55:44,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2023-11-19 07:55:44,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 583. [2023-11-19 07:55:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 438 states have (on average 1.4200913242009132) internal successors, (622), 438 states have internal predecessors, (622), 130 states have call successors, (130), 14 states have call predecessors, (130), 14 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 07:55:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 882 transitions. [2023-11-19 07:55:44,564 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 882 transitions. Word has length 413 [2023-11-19 07:55:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:44,565 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 882 transitions. [2023-11-19 07:55:44,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.363636363636363) internal successors, (184), 22 states have internal predecessors, (184), 6 states have call successors, (130), 4 states have call predecessors, (130), 8 states have return successors, (130), 6 states have call predecessors, (130), 6 states have call successors, (130) [2023-11-19 07:55:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 882 transitions. [2023-11-19 07:55:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2023-11-19 07:55:44,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:44,570 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:44,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:44,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:55:44,786 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:44,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:44,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1698133462, now seen corresponding path program 1 times [2023-11-19 07:55:44,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:44,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185183595] [2023-11-19 07:55:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:44,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:44,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:44,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359171885] [2023-11-19 07:55:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:44,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:44,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:44,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:44,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:55:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:45,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:45,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 3762 proven. 63 refuted. 0 times theorem prover too weak. 4495 trivial. 0 not checked. [2023-11-19 07:55:45,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 129 proven. 63 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:55:45,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:45,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185183595] [2023-11-19 07:55:45,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:45,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359171885] [2023-11-19 07:55:45,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359171885] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:45,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:45,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:55:45,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508641068] [2023-11-19 07:55:45,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:45,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:55:45,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:45,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:55:45,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:55:45,917 INFO L87 Difference]: Start difference. First operand 583 states and 882 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 2 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-19 07:55:46,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:46,670 INFO L93 Difference]: Finished difference Result 1266 states and 1901 transitions. [2023-11-19 07:55:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:55:46,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 2 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) Word has length 413 [2023-11-19 07:55:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:46,677 INFO L225 Difference]: With dead ends: 1266 [2023-11-19 07:55:46,677 INFO L226 Difference]: Without dead ends: 610 [2023-11-19 07:55:46,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 818 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:55:46,680 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 170 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:46,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 709 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:55:46,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2023-11-19 07:55:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 491. [2023-11-19 07:55:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 344 states have (on average 1.3604651162790697) internal successors, (468), 344 states have internal predecessors, (468), 130 states have call successors, (130), 16 states have call predecessors, (130), 16 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 07:55:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 728 transitions. [2023-11-19 07:55:46,814 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 728 transitions. Word has length 413 [2023-11-19 07:55:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:46,815 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 728 transitions. [2023-11-19 07:55:46,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 2 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-19 07:55:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 728 transitions. [2023-11-19 07:55:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2023-11-19 07:55:46,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:46,822 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:46,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:47,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:47,042 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:47,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash -707578879, now seen corresponding path program 1 times [2023-11-19 07:55:47,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:47,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919655198] [2023-11-19 07:55:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:47,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:47,120 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:47,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943520784] [2023-11-19 07:55:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:47,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:47,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:47,122 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:47,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:55:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:47,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:47,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 3168 proven. 144 refuted. 0 times theorem prover too weak. 5008 trivial. 0 not checked. [2023-11-19 07:55:47,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 48 proven. 144 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:55:48,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:48,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919655198] [2023-11-19 07:55:48,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:48,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943520784] [2023-11-19 07:55:48,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943520784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:48,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:48,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:55:48,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587897715] [2023-11-19 07:55:48,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:48,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:48,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:48,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:48,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:48,329 INFO L87 Difference]: Start difference. First operand 491 states and 728 transitions. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) [2023-11-19 07:55:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:49,012 INFO L93 Difference]: Finished difference Result 995 states and 1467 transitions. [2023-11-19 07:55:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:55:49,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) Word has length 414 [2023-11-19 07:55:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:49,019 INFO L225 Difference]: With dead ends: 995 [2023-11-19 07:55:49,019 INFO L226 Difference]: Without dead ends: 507 [2023-11-19 07:55:49,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 830 GetRequests, 820 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:55:49,022 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 135 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:49,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 531 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:55:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-11-19 07:55:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 499. [2023-11-19 07:55:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 350 states have (on average 1.3428571428571427) internal successors, (470), 350 states have internal predecessors, (470), 130 states have call successors, (130), 18 states have call predecessors, (130), 18 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 07:55:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 730 transitions. [2023-11-19 07:55:49,166 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 730 transitions. Word has length 414 [2023-11-19 07:55:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:49,167 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 730 transitions. [2023-11-19 07:55:49,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) [2023-11-19 07:55:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 730 transitions. [2023-11-19 07:55:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2023-11-19 07:55:49,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:49,172 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:49,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:49,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:49,394 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:49,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash 678624515, now seen corresponding path program 1 times [2023-11-19 07:55:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:49,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973718166] [2023-11-19 07:55:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:49,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:49,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268486111] [2023-11-19 07:55:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:49,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:49,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:49,463 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:49,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:55:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:49,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:55:49,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 5462 proven. 216 refuted. 0 times theorem prover too weak. 2642 trivial. 0 not checked. [2023-11-19 07:55:50,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:54,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973718166] [2023-11-19 07:55:54,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268486111] [2023-11-19 07:55:54,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268486111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:54,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:55:54,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-19 07:55:54,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449224169] [2023-11-19 07:55:54,412 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:54,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:55:54,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:54,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:55:54,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:55:54,415 INFO L87 Difference]: Start difference. First operand 499 states and 730 transitions. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 3 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) [2023-11-19 07:55:55,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:55,296 INFO L93 Difference]: Finished difference Result 1015 states and 1475 transitions. [2023-11-19 07:55:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:55:55,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 3 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) Word has length 414 [2023-11-19 07:55:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:55,303 INFO L225 Difference]: With dead ends: 1015 [2023-11-19 07:55:55,303 INFO L226 Difference]: Without dead ends: 519 [2023-11-19 07:55:55,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:55:55,306 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 366 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:55,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 775 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:55:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-11-19 07:55:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 507. [2023-11-19 07:55:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 356 states have (on average 1.3202247191011236) internal successors, (470), 356 states have internal predecessors, (470), 130 states have call successors, (130), 20 states have call predecessors, (130), 20 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 07:55:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 730 transitions. [2023-11-19 07:55:55,415 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 730 transitions. Word has length 414 [2023-11-19 07:55:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:55,416 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 730 transitions. [2023-11-19 07:55:55,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 3 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (65), 3 states have call predecessors, (65), 3 states have call successors, (65) [2023-11-19 07:55:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 730 transitions. [2023-11-19 07:55:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2023-11-19 07:55:55,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:55,420 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:55,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:55,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:55,634 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:55,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:55,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1665850877, now seen corresponding path program 1 times [2023-11-19 07:55:55,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:55,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63184723] [2023-11-19 07:55:55,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:55,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:55,707 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:55,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419869830] [2023-11-19 07:55:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:55,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:55,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:55,709 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:55,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:55:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:56,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:55:56,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-19 07:55:56,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:56,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:56,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63184723] [2023-11-19 07:55:56,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:56,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419869830] [2023-11-19 07:55:56,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419869830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:56,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:56,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:56,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974912399] [2023-11-19 07:55:56,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:56,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:56,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:56,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:56,636 INFO L87 Difference]: Start difference. First operand 507 states and 730 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:55:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:57,050 INFO L93 Difference]: Finished difference Result 1355 states and 1955 transitions. [2023-11-19 07:55:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:57,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 416 [2023-11-19 07:55:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:57,059 INFO L225 Difference]: With dead ends: 1355 [2023-11-19 07:55:57,060 INFO L226 Difference]: Without dead ends: 851 [2023-11-19 07:55:57,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 413 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 07:55:57,063 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 202 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:57,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 846 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:55:57,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2023-11-19 07:55:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 831. [2023-11-19 07:55:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 605 states have (on average 1.3371900826446281) internal successors, (809), 605 states have internal predecessors, (809), 195 states have call successors, (195), 30 states have call predecessors, (195), 30 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2023-11-19 07:55:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1199 transitions. [2023-11-19 07:55:57,259 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1199 transitions. Word has length 416 [2023-11-19 07:55:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:57,260 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1199 transitions. [2023-11-19 07:55:57,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:55:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1199 transitions. [2023-11-19 07:55:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2023-11-19 07:55:57,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:57,265 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:57,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:57,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:55:57,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:57,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:57,489 INFO L85 PathProgramCache]: Analyzing trace with hash -723029113, now seen corresponding path program 1 times [2023-11-19 07:55:57,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:57,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506094062] [2023-11-19 07:55:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:57,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:57,554 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:57,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37754708] [2023-11-19 07:55:57,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:57,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:57,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:57,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:57,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:55:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:57,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:57,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 1872 proven. 168 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2023-11-19 07:55:58,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 24 proven. 168 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:55:58,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:58,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506094062] [2023-11-19 07:55:58,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:58,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37754708] [2023-11-19 07:55:58,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37754708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:58,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:58,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:55:58,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829955978] [2023-11-19 07:55:58,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:58,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:58,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:58,776 INFO L87 Difference]: Start difference. First operand 831 states and 1199 transitions. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-19 07:55:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:59,420 INFO L93 Difference]: Finished difference Result 1533 states and 2205 transitions. [2023-11-19 07:55:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:55:59,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) Word has length 417 [2023-11-19 07:55:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:59,432 INFO L225 Difference]: With dead ends: 1533 [2023-11-19 07:55:59,432 INFO L226 Difference]: Without dead ends: 861 [2023-11-19 07:55:59,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:55:59,435 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 253 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:59,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 482 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:55:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2023-11-19 07:55:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 843. [2023-11-19 07:55:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 614 states have (on average 1.3192182410423452) internal successors, (810), 614 states have internal predecessors, (810), 195 states have call successors, (195), 33 states have call predecessors, (195), 33 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2023-11-19 07:55:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1200 transitions. [2023-11-19 07:55:59,664 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1200 transitions. Word has length 417 [2023-11-19 07:55:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:59,666 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 1200 transitions. [2023-11-19 07:55:59,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-19 07:55:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1200 transitions. [2023-11-19 07:55:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2023-11-19 07:55:59,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:59,670 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:59,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:59,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:59,874 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:59,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:59,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1112872606, now seen corresponding path program 1 times [2023-11-19 07:55:59,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:59,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4459582] [2023-11-19 07:55:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:59,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:59,938 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:59,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202421604] [2023-11-19 07:55:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:59,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:59,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:59,940 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:59,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:56:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:00,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:56:00,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 1872 proven. 168 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2023-11-19 07:56:01,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 24 proven. 168 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:56:01,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:01,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4459582] [2023-11-19 07:56:01,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:01,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202421604] [2023-11-19 07:56:01,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202421604] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:01,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:56:01,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-19 07:56:01,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278022803] [2023-11-19 07:56:01,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:01,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:56:01,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:01,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:56:01,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:56:01,954 INFO L87 Difference]: Start difference. First operand 843 states and 1200 transitions. Second operand has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-19 07:56:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:03,650 INFO L93 Difference]: Finished difference Result 1797 states and 2568 transitions. [2023-11-19 07:56:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:56:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) Word has length 418 [2023-11-19 07:56:03,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:03,659 INFO L225 Difference]: With dead ends: 1797 [2023-11-19 07:56:03,659 INFO L226 Difference]: Without dead ends: 1117 [2023-11-19 07:56:03,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:56:03,663 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 1152 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:03,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1216 Valid, 1136 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 07:56:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2023-11-19 07:56:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 847. [2023-11-19 07:56:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 618 states have (on average 1.313915857605178) internal successors, (812), 618 states have internal predecessors, (812), 195 states have call successors, (195), 33 states have call predecessors, (195), 33 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2023-11-19 07:56:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1202 transitions. [2023-11-19 07:56:03,858 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1202 transitions. Word has length 418 [2023-11-19 07:56:03,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:03,859 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1202 transitions. [2023-11-19 07:56:03,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-19 07:56:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1202 transitions. [2023-11-19 07:56:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2023-11-19 07:56:03,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:03,864 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:56:03,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:04,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:04,078 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:04,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1253821988, now seen corresponding path program 1 times [2023-11-19 07:56:04,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:04,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089445806] [2023-11-19 07:56:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:04,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:04,140 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:04,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517469338] [2023-11-19 07:56:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:04,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:04,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:04,142 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:04,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d828d88-cfe3-4076-90ad-47d897f1fc8f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:56:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:04,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 07:56:04,576 INFO L285 TraceCheckSpWp]: Computing forward predicates...