./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-44.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/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_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-44.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/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_a20a0dca-0d53-470a-acd8-520adaf23e35/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 2cb491f7f9545a6adbf1064efa3c5a7ac2d13ac5b757e6b82f3ae15070d0ceda --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:07:03,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:07:03,609 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:07:03,620 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:07:03,621 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:07:03,659 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:07:03,660 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:07:03,661 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:07:03,662 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:07:03,667 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:07:03,668 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:07:03,669 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:07:03,669 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:07:03,671 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:07:03,672 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:07:03,672 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:07:03,672 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:07:03,673 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:07:03,673 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:07:03,674 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:07:03,674 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:07:03,675 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:07:03,675 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:07:03,676 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:07:03,676 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:07:03,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:07:03,678 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:07:03,679 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:07:03,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:07:03,681 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:07:03,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:07:03,682 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:07:03,682 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:07:03,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:07:03,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:07:03,683 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:07:03,683 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:07:03,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:07:03,684 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:07:03,684 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_a20a0dca-0d53-470a-acd8-520adaf23e35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cb491f7f9545a6adbf1064efa3c5a7ac2d13ac5b757e6b82f3ae15070d0ceda [2023-11-19 08:07:04,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:07:04,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:07:04,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:07:04,080 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:07:04,081 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:07:04,084 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-44.i [2023-11-19 08:07:07,164 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:07:07,522 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:07:07,523 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-44.i [2023-11-19 08:07:07,535 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/data/67369720f/eb62592702894d9db3bb5fe5138b29d6/FLAG394b24c22 [2023-11-19 08:07:07,550 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/data/67369720f/eb62592702894d9db3bb5fe5138b29d6 [2023-11-19 08:07:07,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:07:07,555 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:07:07,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:07:07,556 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:07:07,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:07:07,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcefd62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:07, skipping insertion in model container [2023-11-19 08:07:07,567 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:07:07" (1/1) ... [2023-11-19 08:07:07,635 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:07:07,830 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_a20a0dca-0d53-470a-acd8-520adaf23e35/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-44.i[916,929] [2023-11-19 08:07:08,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:07:08,044 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:07:08,056 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_a20a0dca-0d53-470a-acd8-520adaf23e35/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-44.i[916,929] [2023-11-19 08:07:08,133 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:07:08,152 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:07:08,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08 WrapperNode [2023-11-19 08:07:08,153 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:07:08,154 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:07:08,154 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:07:08,154 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:07:08,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,183 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,254 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 483 [2023-11-19 08:07:08,255 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:07:08,256 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:07:08,256 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:07:08,256 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:07:08,266 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,289 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,316 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,334 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:07:08,373 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:07:08,373 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:07:08,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:07:08,374 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (1/1) ... [2023-11-19 08:07:08,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:07:08,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:08,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:07:08,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:07:08,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:07:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:07:08,459 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:07:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:07:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:07:08,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:07:08,622 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:07:08,625 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:07:09,619 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:07:09,630 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:07:09,631 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:07:09,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:07:09 BoogieIcfgContainer [2023-11-19 08:07:09,636 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:07:09,639 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:07:09,639 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:07:09,642 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:07:09,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:07:07" (1/3) ... [2023-11-19 08:07:09,643 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dd2228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:07:09, skipping insertion in model container [2023-11-19 08:07:09,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:07:08" (2/3) ... [2023-11-19 08:07:09,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dd2228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:07:09, skipping insertion in model container [2023-11-19 08:07:09,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:07:09" (3/3) ... [2023-11-19 08:07:09,645 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-44.i [2023-11-19 08:07:09,666 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:07:09,666 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:07:09,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:07:09,729 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;@78aa0699, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:07:09,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:07:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 201 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 155 states have internal predecessors, (241), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-19 08:07:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-19 08:07:09,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:09,765 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:09,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:09,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:09,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1344578757, now seen corresponding path program 1 times [2023-11-19 08:07:09,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:09,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968559446] [2023-11-19 08:07:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:09,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:10,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:10,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968559446] [2023-11-19 08:07:10,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:07:10,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416043174] [2023-11-19 08:07:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:10,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:10,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:10,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:10,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:07:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:10,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:07:10,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2023-11-19 08:07:10,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:10,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416043174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:10,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:10,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:07:10,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920672191] [2023-11-19 08:07:10,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:10,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:07:10,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:10,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:07:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:07:10,734 INFO L87 Difference]: Start difference. First operand has 201 states, 154 states have (on average 1.5649350649350648) internal successors, (241), 155 states have internal predecessors, (241), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) [2023-11-19 08:07:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:10,803 INFO L93 Difference]: Finished difference Result 392 states and 691 transitions. [2023-11-19 08:07:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:07:10,806 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) Word has length 299 [2023-11-19 08:07:10,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:10,819 INFO L225 Difference]: With dead ends: 392 [2023-11-19 08:07:10,819 INFO L226 Difference]: Without dead ends: 194 [2023-11-19 08:07:10,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:07:10,831 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:10,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:07:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-19 08:07:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2023-11-19 08:07:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 148 states have (on average 1.5405405405405406) internal successors, (228), 148 states have internal predecessors, (228), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-19 08:07:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 316 transitions. [2023-11-19 08:07:10,939 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 316 transitions. Word has length 299 [2023-11-19 08:07:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:10,940 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 316 transitions. [2023-11-19 08:07:10,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 2 states have call successors, (44) [2023-11-19 08:07:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 316 transitions. [2023-11-19 08:07:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-19 08:07:10,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:10,954 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:10,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:07:11,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:07:11,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:11,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:11,156 INFO L85 PathProgramCache]: Analyzing trace with hash -736370817, now seen corresponding path program 1 times [2023-11-19 08:07:11,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:11,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665319337] [2023-11-19 08:07:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:11,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:11,333 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:11,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359099148] [2023-11-19 08:07:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:11,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:11,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:11,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:11,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:07:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:11,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:07:11,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-19 08:07:12,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665319337] [2023-11-19 08:07:12,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:12,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359099148] [2023-11-19 08:07:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359099148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:12,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:12,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671203693] [2023-11-19 08:07:12,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:12,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:07:12,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:12,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:07:12,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:12,222 INFO L87 Difference]: Start difference. First operand 194 states and 316 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:12,656 INFO L93 Difference]: Finished difference Result 577 states and 943 transitions. [2023-11-19 08:07:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:07:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 299 [2023-11-19 08:07:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:12,669 INFO L225 Difference]: With dead ends: 577 [2023-11-19 08:07:12,670 INFO L226 Difference]: Without dead ends: 386 [2023-11-19 08:07:12,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:07:12,673 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 222 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:12,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 917 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:07:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-19 08:07:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 277. [2023-11-19 08:07:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 186 states have (on average 1.456989247311828) internal successors, (271), 186 states have internal predecessors, (271), 88 states have call successors, (88), 2 states have call predecessors, (88), 2 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-19 08:07:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 447 transitions. [2023-11-19 08:07:12,734 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 447 transitions. Word has length 299 [2023-11-19 08:07:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:12,736 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 447 transitions. [2023-11-19 08:07:12,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 447 transitions. [2023-11-19 08:07:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-19 08:07:12,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:12,743 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:12,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:12,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:12,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:12,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1509208637, now seen corresponding path program 1 times [2023-11-19 08:07:12,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:12,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192452738] [2023-11-19 08:07:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:12,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:13,087 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:13,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119071831] [2023-11-19 08:07:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:13,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:13,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:13,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:13,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:07:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:13,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:07:13,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-19 08:07:13,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:13,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:13,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192452738] [2023-11-19 08:07:13,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:13,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119071831] [2023-11-19 08:07:13,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119071831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:13,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:13,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:13,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578523181] [2023-11-19 08:07:13,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:13,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:13,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:13,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:13,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:13,428 INFO L87 Difference]: Start difference. First operand 277 states and 447 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:13,537 INFO L93 Difference]: Finished difference Result 569 states and 923 transitions. [2023-11-19 08:07:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:13,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 299 [2023-11-19 08:07:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:13,542 INFO L225 Difference]: With dead ends: 569 [2023-11-19 08:07:13,543 INFO L226 Difference]: Without dead ends: 378 [2023-11-19 08:07:13,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 297 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 08:07:13,545 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 170 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:13,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 716 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-19 08:07:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 375. [2023-11-19 08:07:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 279 states have (on average 1.5089605734767024) internal successors, (421), 280 states have internal predecessors, (421), 92 states have call successors, (92), 3 states have call predecessors, (92), 3 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-19 08:07:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 605 transitions. [2023-11-19 08:07:13,601 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 605 transitions. Word has length 299 [2023-11-19 08:07:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:13,602 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 605 transitions. [2023-11-19 08:07:13,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 605 transitions. [2023-11-19 08:07:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-19 08:07:13,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:13,609 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:13,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:13,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:13,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:13,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:13,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2126227137, now seen corresponding path program 1 times [2023-11-19 08:07:13,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:13,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124364568] [2023-11-19 08:07:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:13,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:13,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:13,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304428412] [2023-11-19 08:07:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:13,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:13,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:13,949 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:13,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:07:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:14,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:07:14,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-19 08:07:14,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:14,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124364568] [2023-11-19 08:07:14,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:14,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304428412] [2023-11-19 08:07:14,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304428412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:14,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:14,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:07:14,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786683952] [2023-11-19 08:07:14,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:14,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:07:14,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:07:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:07:14,694 INFO L87 Difference]: Start difference. First operand 375 states and 605 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:15,266 INFO L93 Difference]: Finished difference Result 1563 states and 2512 transitions. [2023-11-19 08:07:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:07:15,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 299 [2023-11-19 08:07:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:15,280 INFO L225 Difference]: With dead ends: 1563 [2023-11-19 08:07:15,280 INFO L226 Difference]: Without dead ends: 1274 [2023-11-19 08:07:15,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:07:15,283 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 1525 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:15,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1525 Valid, 1725 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:07:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2023-11-19 08:07:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1076. [2023-11-19 08:07:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 845 states have (on average 1.5431952662721893) internal successors, (1304), 845 states have internal predecessors, (1304), 220 states have call successors, (220), 10 states have call predecessors, (220), 10 states have return successors, (220), 220 states have call predecessors, (220), 220 states have call successors, (220) [2023-11-19 08:07:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1744 transitions. [2023-11-19 08:07:15,432 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1744 transitions. Word has length 299 [2023-11-19 08:07:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:15,433 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 1744 transitions. [2023-11-19 08:07:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1744 transitions. [2023-11-19 08:07:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-19 08:07:15,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:15,441 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:15,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:15,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:15,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:15,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:15,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1079506174, now seen corresponding path program 1 times [2023-11-19 08:07:15,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:15,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610406986] [2023-11-19 08:07:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:15,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:15,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:15,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988204890] [2023-11-19 08:07:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:15,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:15,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:15,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:15,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:07:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:16,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:07:16,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1593 proven. 36 refuted. 0 times theorem prover too weak. 2155 trivial. 0 not checked. [2023-11-19 08:07:16,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-19 08:07:16,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:16,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610406986] [2023-11-19 08:07:16,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:16,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988204890] [2023-11-19 08:07:16,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988204890] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:07:16,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:07:16,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 08:07:16,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189749319] [2023-11-19 08:07:16,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:16,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:16,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:16,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:16,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:07:16,521 INFO L87 Difference]: Start difference. First operand 1076 states and 1744 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:18,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 08:07:20,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 08:07:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:20,653 INFO L93 Difference]: Finished difference Result 3025 states and 4911 transitions. [2023-11-19 08:07:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:20,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 300 [2023-11-19 08:07:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:20,672 INFO L225 Difference]: With dead ends: 3025 [2023-11-19 08:07:20,672 INFO L226 Difference]: Without dead ends: 2039 [2023-11-19 08:07:20,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:07:20,676 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 293 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:20,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 586 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-11-19 08:07:20,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2023-11-19 08:07:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2033. [2023-11-19 08:07:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 1618 states have (on average 1.5395550061804697) internal successors, (2491), 1618 states have internal predecessors, (2491), 396 states have call successors, (396), 18 states have call predecessors, (396), 18 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) [2023-11-19 08:07:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3283 transitions. [2023-11-19 08:07:20,901 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3283 transitions. Word has length 300 [2023-11-19 08:07:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:20,902 INFO L495 AbstractCegarLoop]: Abstraction has 2033 states and 3283 transitions. [2023-11-19 08:07:20,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3283 transitions. [2023-11-19 08:07:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-11-19 08:07:20,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:20,910 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:20,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:21,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:21,137 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:21,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash 426203683, now seen corresponding path program 1 times [2023-11-19 08:07:21,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:21,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010590031] [2023-11-19 08:07:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:21,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:21,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:21,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351798190] [2023-11-19 08:07:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:21,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:21,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:21,242 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:21,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:07:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:21,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:07:21,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 675 proven. 117 refuted. 0 times theorem prover too weak. 2992 trivial. 0 not checked. [2023-11-19 08:07:22,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 12 proven. 117 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-11-19 08:07:22,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010590031] [2023-11-19 08:07:22,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351798190] [2023-11-19 08:07:22,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351798190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:22,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:22,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:07:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139988103] [2023-11-19 08:07:22,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:22,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:07:22,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:07:22,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:07:22,360 INFO L87 Difference]: Start difference. First operand 2033 states and 3283 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-19 08:07:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:22,917 INFO L93 Difference]: Finished difference Result 3631 states and 5779 transitions. [2023-11-19 08:07:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:07:22,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 301 [2023-11-19 08:07:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:22,934 INFO L225 Difference]: With dead ends: 3631 [2023-11-19 08:07:22,934 INFO L226 Difference]: Without dead ends: 1689 [2023-11-19 08:07:22,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 594 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 08:07:22,945 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 189 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:22,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 701 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:07:22,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2023-11-19 08:07:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1653. [2023-11-19 08:07:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1229 states have (on average 1.4629780309194467) internal successors, (1798), 1229 states have internal predecessors, (1798), 396 states have call successors, (396), 27 states have call predecessors, (396), 27 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) [2023-11-19 08:07:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2590 transitions. [2023-11-19 08:07:23,195 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2590 transitions. Word has length 301 [2023-11-19 08:07:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:23,195 INFO L495 AbstractCegarLoop]: Abstraction has 1653 states and 2590 transitions. [2023-11-19 08:07:23,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-19 08:07:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2590 transitions. [2023-11-19 08:07:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-19 08:07:23,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:23,203 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:23,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:23,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:23,417 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:23,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:23,417 INFO L85 PathProgramCache]: Analyzing trace with hash 685200198, now seen corresponding path program 1 times [2023-11-19 08:07:23,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:23,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899040481] [2023-11-19 08:07:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:23,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:23,471 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:23,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13164416] [2023-11-19 08:07:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:23,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:23,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:23,473 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:23,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:07:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:23,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:07:23,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-19 08:07:23,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:23,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:23,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899040481] [2023-11-19 08:07:23,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:23,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13164416] [2023-11-19 08:07:23,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13164416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:23,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:07:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962744809] [2023-11-19 08:07:23,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:23,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:07:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:07:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:23,860 INFO L87 Difference]: Start difference. First operand 1653 states and 2590 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:25,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 08:07:28,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 08:07:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:28,746 INFO L93 Difference]: Finished difference Result 4587 states and 7175 transitions. [2023-11-19 08:07:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:07:28,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 302 [2023-11-19 08:07:28,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:28,769 INFO L225 Difference]: With dead ends: 4587 [2023-11-19 08:07:28,769 INFO L226 Difference]: Without dead ends: 3029 [2023-11-19 08:07:28,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 299 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 08:07:28,777 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 721 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 93 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:28,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 894 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 156 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2023-11-19 08:07:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2023-11-19 08:07:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1881. [2023-11-19 08:07:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1457 states have (on average 1.4934797529169526) internal successors, (2176), 1457 states have internal predecessors, (2176), 396 states have call successors, (396), 27 states have call predecessors, (396), 27 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) [2023-11-19 08:07:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2968 transitions. [2023-11-19 08:07:29,033 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2968 transitions. Word has length 302 [2023-11-19 08:07:29,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:29,035 INFO L495 AbstractCegarLoop]: Abstraction has 1881 states and 2968 transitions. [2023-11-19 08:07:29,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2968 transitions. [2023-11-19 08:07:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-19 08:07:29,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:29,040 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:29,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:29,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:29,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:29,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash -739891214, now seen corresponding path program 1 times [2023-11-19 08:07:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:29,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701611539] [2023-11-19 08:07:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:29,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:29,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101478783] [2023-11-19 08:07:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:29,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:29,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:29,321 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:29,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:07:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:29,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:07:29,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 529 proven. 120 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2023-11-19 08:07:30,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-11-19 08:07:30,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:30,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701611539] [2023-11-19 08:07:30,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:30,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101478783] [2023-11-19 08:07:30,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101478783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:30,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:30,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:07:30,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023949281] [2023-11-19 08:07:30,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:30,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:07:30,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:30,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:07:30,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:07:30,393 INFO L87 Difference]: Start difference. First operand 1881 states and 2968 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (84), 2 states have call predecessors, (84), 4 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2023-11-19 08:07:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:30,962 INFO L93 Difference]: Finished difference Result 3731 states and 5842 transitions. [2023-11-19 08:07:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:07:30,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (84), 2 states have call predecessors, (84), 4 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) Word has length 302 [2023-11-19 08:07:30,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:30,976 INFO L225 Difference]: With dead ends: 3731 [2023-11-19 08:07:30,977 INFO L226 Difference]: Without dead ends: 1945 [2023-11-19 08:07:30,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 596 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:07:30,982 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 372 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:30,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 676 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:07:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2023-11-19 08:07:31,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1909. [2023-11-19 08:07:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1909 states, 1476 states have (on average 1.4762872628726287) internal successors, (2179), 1476 states have internal predecessors, (2179), 396 states have call successors, (396), 36 states have call predecessors, (396), 36 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) [2023-11-19 08:07:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1909 states to 1909 states and 2971 transitions. [2023-11-19 08:07:31,225 INFO L78 Accepts]: Start accepts. Automaton has 1909 states and 2971 transitions. Word has length 302 [2023-11-19 08:07:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:31,226 INFO L495 AbstractCegarLoop]: Abstraction has 1909 states and 2971 transitions. [2023-11-19 08:07:31,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 2 states have call successors, (84), 2 states have call predecessors, (84), 4 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2023-11-19 08:07:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1909 states and 2971 transitions. [2023-11-19 08:07:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-19 08:07:31,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:31,231 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:31,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:31,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:31,445 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:31,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1291549940, now seen corresponding path program 1 times [2023-11-19 08:07:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:31,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456992359] [2023-11-19 08:07:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:31,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:31,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:31,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080471775] [2023-11-19 08:07:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:31,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:31,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:31,518 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:31,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:07:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:31,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:07:31,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-19 08:07:32,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:32,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:32,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456992359] [2023-11-19 08:07:32,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:32,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080471775] [2023-11-19 08:07:32,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080471775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:32,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:32,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:07:32,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256418300] [2023-11-19 08:07:32,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:32,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:07:32,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:32,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:07:32,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:07:32,155 INFO L87 Difference]: Start difference. First operand 1909 states and 2971 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:32,507 INFO L93 Difference]: Finished difference Result 5535 states and 8634 transitions. [2023-11-19 08:07:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:07:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 302 [2023-11-19 08:07:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:32,532 INFO L225 Difference]: With dead ends: 5535 [2023-11-19 08:07:32,532 INFO L226 Difference]: Without dead ends: 3725 [2023-11-19 08:07:32,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 300 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 08:07:32,540 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 175 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:32,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 581 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2023-11-19 08:07:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2023-11-19 08:07:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 2906 states have (on average 1.4803854094975912) internal successors, (4302), 2906 states have internal predecessors, (4302), 748 states have call successors, (748), 68 states have call predecessors, (748), 68 states have return successors, (748), 748 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-19 08:07:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5798 transitions. [2023-11-19 08:07:32,998 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5798 transitions. Word has length 302 [2023-11-19 08:07:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:32,999 INFO L495 AbstractCegarLoop]: Abstraction has 3723 states and 5798 transitions. [2023-11-19 08:07:32,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5798 transitions. [2023-11-19 08:07:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-19 08:07:33,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:33,004 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:33,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:33,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:33,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:33,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:33,236 INFO L85 PathProgramCache]: Analyzing trace with hash 867903218, now seen corresponding path program 1 times [2023-11-19 08:07:33,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:33,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128259400] [2023-11-19 08:07:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:33,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:33,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:33,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158819881] [2023-11-19 08:07:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:33,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:33,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:33,293 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:33,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:07:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:33,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:07:33,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-19 08:07:33,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:33,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:33,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128259400] [2023-11-19 08:07:33,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:33,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158819881] [2023-11-19 08:07:33,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158819881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:33,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:33,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:33,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992739530] [2023-11-19 08:07:33,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:33,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:07:33,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:07:33,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:33,999 INFO L87 Difference]: Start difference. First operand 3723 states and 5798 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:34,431 INFO L93 Difference]: Finished difference Result 8333 states and 13042 transitions. [2023-11-19 08:07:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:07:34,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 302 [2023-11-19 08:07:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:34,461 INFO L225 Difference]: With dead ends: 8333 [2023-11-19 08:07:34,461 INFO L226 Difference]: Without dead ends: 4713 [2023-11-19 08:07:34,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:07:34,532 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 313 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:34,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 908 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2023-11-19 08:07:35,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 3723. [2023-11-19 08:07:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 2906 states have (on average 1.4796971782518926) internal successors, (4300), 2906 states have internal predecessors, (4300), 748 states have call successors, (748), 68 states have call predecessors, (748), 68 states have return successors, (748), 748 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-19 08:07:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5796 transitions. [2023-11-19 08:07:35,069 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5796 transitions. Word has length 302 [2023-11-19 08:07:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:35,069 INFO L495 AbstractCegarLoop]: Abstraction has 3723 states and 5796 transitions. [2023-11-19 08:07:35,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5796 transitions. [2023-11-19 08:07:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-19 08:07:35,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:35,075 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:35,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:35,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:35,297 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:35,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash 863381339, now seen corresponding path program 1 times [2023-11-19 08:07:35,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:35,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416281] [2023-11-19 08:07:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:35,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:35,355 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:35,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536231208] [2023-11-19 08:07:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:35,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:35,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:35,357 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:35,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:07:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:35,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:07:35,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-19 08:07:36,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:36,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:36,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416281] [2023-11-19 08:07:36,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:36,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536231208] [2023-11-19 08:07:36,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536231208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:36,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:36,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:07:36,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467665504] [2023-11-19 08:07:36,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:36,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:07:36,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:36,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:07:36,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:07:36,113 INFO L87 Difference]: Start difference. First operand 3723 states and 5796 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:37,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:37,374 INFO L93 Difference]: Finished difference Result 16717 states and 26360 transitions. [2023-11-19 08:07:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:07:37,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 303 [2023-11-19 08:07:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:37,458 INFO L225 Difference]: With dead ends: 16717 [2023-11-19 08:07:37,458 INFO L226 Difference]: Without dead ends: 13099 [2023-11-19 08:07:37,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:07:37,473 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 1375 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:37,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1375 Valid, 2758 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:07:37,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13099 states. [2023-11-19 08:07:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13099 to 4411. [2023-11-19 08:07:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4411 states, 3594 states have (on average 1.5036171396772398) internal successors, (5404), 3594 states have internal predecessors, (5404), 748 states have call successors, (748), 68 states have call predecessors, (748), 68 states have return successors, (748), 748 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-19 08:07:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4411 states to 4411 states and 6900 transitions. [2023-11-19 08:07:38,385 INFO L78 Accepts]: Start accepts. Automaton has 4411 states and 6900 transitions. Word has length 303 [2023-11-19 08:07:38,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:38,386 INFO L495 AbstractCegarLoop]: Abstraction has 4411 states and 6900 transitions. [2023-11-19 08:07:38,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4411 states and 6900 transitions. [2023-11-19 08:07:38,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-19 08:07:38,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:38,391 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:38,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:38,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 08:07:38,601 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:38,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:38,601 INFO L85 PathProgramCache]: Analyzing trace with hash 229378398, now seen corresponding path program 1 times [2023-11-19 08:07:38,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:38,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134997902] [2023-11-19 08:07:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:38,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:38,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:38,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970028120] [2023-11-19 08:07:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:38,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:38,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:38,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:38,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:07:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:39,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:07:39,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1725 proven. 42 refuted. 0 times theorem prover too weak. 2017 trivial. 0 not checked. [2023-11-19 08:07:39,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 87 proven. 42 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-11-19 08:07:39,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134997902] [2023-11-19 08:07:39,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970028120] [2023-11-19 08:07:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970028120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:39,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:39,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-19 08:07:39,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739185189] [2023-11-19 08:07:39,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:39,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:07:39,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:07:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:07:39,469 INFO L87 Difference]: Start difference. First operand 4411 states and 6900 transitions. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 3 states have call successors, (58), 2 states have call predecessors, (58), 4 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2023-11-19 08:07:42,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 08:07:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:43,336 INFO L93 Difference]: Finished difference Result 11395 states and 17748 transitions. [2023-11-19 08:07:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 08:07:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 3 states have call successors, (58), 2 states have call predecessors, (58), 4 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) Word has length 303 [2023-11-19 08:07:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:43,360 INFO L225 Difference]: With dead ends: 11395 [2023-11-19 08:07:43,360 INFO L226 Difference]: Without dead ends: 7089 [2023-11-19 08:07:43,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2023-11-19 08:07:43,411 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 1084 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 359 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:43,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 1920 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 803 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2023-11-19 08:07:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2023-11-19 08:07:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 4481. [2023-11-19 08:07:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 3647 states have (on average 1.4962983273923773) internal successors, (5457), 3647 states have internal predecessors, (5457), 748 states have call successors, (748), 85 states have call predecessors, (748), 85 states have return successors, (748), 748 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-19 08:07:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 6953 transitions. [2023-11-19 08:07:44,058 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 6953 transitions. Word has length 303 [2023-11-19 08:07:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:44,060 INFO L495 AbstractCegarLoop]: Abstraction has 4481 states and 6953 transitions. [2023-11-19 08:07:44,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 3 states have call successors, (58), 2 states have call predecessors, (58), 4 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2023-11-19 08:07:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 6953 transitions. [2023-11-19 08:07:44,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-19 08:07:44,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:44,067 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:44,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:44,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 08:07:44,290 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:44,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:44,290 INFO L85 PathProgramCache]: Analyzing trace with hash 582466780, now seen corresponding path program 1 times [2023-11-19 08:07:44,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:44,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089022529] [2023-11-19 08:07:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:44,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:44,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:44,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797873377] [2023-11-19 08:07:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:44,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:44,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:44,352 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:44,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 08:07:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:44,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:07:44,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1555 proven. 93 refuted. 0 times theorem prover too weak. 2136 trivial. 0 not checked. [2023-11-19 08:07:45,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:47,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:47,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089022529] [2023-11-19 08:07:47,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:47,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797873377] [2023-11-19 08:07:47,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797873377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:07:47,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:07:47,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-19 08:07:47,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434955052] [2023-11-19 08:07:47,390 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:47,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:07:47,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:47,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:07:47,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:07:47,392 INFO L87 Difference]: Start difference. First operand 4481 states and 6953 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2023-11-19 08:07:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:49,146 INFO L93 Difference]: Finished difference Result 8957 states and 13846 transitions. [2023-11-19 08:07:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 08:07:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 303 [2023-11-19 08:07:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:49,161 INFO L225 Difference]: With dead ends: 8957 [2023-11-19 08:07:49,161 INFO L226 Difference]: Without dead ends: 4587 [2023-11-19 08:07:49,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-19 08:07:49,174 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 635 mSDsluCounter, 1837 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:49,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 2213 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 08:07:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2023-11-19 08:07:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 4517. [2023-11-19 08:07:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 3674 states have (on average 1.4893848666303755) internal successors, (5472), 3674 states have internal predecessors, (5472), 748 states have call successors, (748), 94 states have call predecessors, (748), 94 states have return successors, (748), 748 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-19 08:07:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 6968 transitions. [2023-11-19 08:07:49,682 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 6968 transitions. Word has length 303 [2023-11-19 08:07:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:49,686 INFO L495 AbstractCegarLoop]: Abstraction has 4517 states and 6968 transitions. [2023-11-19 08:07:49,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 8 states have internal predecessors, (92), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2023-11-19 08:07:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 6968 transitions. [2023-11-19 08:07:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-19 08:07:49,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:49,692 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:49,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:49,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:49,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:49,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1239245592, now seen corresponding path program 1 times [2023-11-19 08:07:49,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:49,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155787735] [2023-11-19 08:07:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:49,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:49,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:49,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436104904] [2023-11-19 08:07:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:49,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:49,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:49,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:49,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 08:07:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:50,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:07:50,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2023-11-19 08:07:50,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:07:50,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:50,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155787735] [2023-11-19 08:07:50,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:50,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436104904] [2023-11-19 08:07:50,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436104904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:07:50,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:07:50,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:07:50,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818226558] [2023-11-19 08:07:50,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:07:50,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:07:50,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:07:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:07:50,698 INFO L87 Difference]: Start difference. First operand 4517 states and 6968 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:07:51,286 INFO L93 Difference]: Finished difference Result 7249 states and 11245 transitions. [2023-11-19 08:07:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:07:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) Word has length 303 [2023-11-19 08:07:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:07:51,301 INFO L225 Difference]: With dead ends: 7249 [2023-11-19 08:07:51,301 INFO L226 Difference]: Without dead ends: 5056 [2023-11-19 08:07:51,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:07:51,307 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 320 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:07:51,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 906 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:07:51,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2023-11-19 08:07:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4510. [2023-11-19 08:07:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 3667 states have (on average 1.4895009544586855) internal successors, (5462), 3667 states have internal predecessors, (5462), 748 states have call successors, (748), 94 states have call predecessors, (748), 94 states have return successors, (748), 748 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-19 08:07:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 6958 transitions. [2023-11-19 08:07:51,891 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 6958 transitions. Word has length 303 [2023-11-19 08:07:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:07:51,893 INFO L495 AbstractCegarLoop]: Abstraction has 4510 states and 6958 transitions. [2023-11-19 08:07:51,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 1 states have call predecessors, (44), 1 states have call successors, (44) [2023-11-19 08:07:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 6958 transitions. [2023-11-19 08:07:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-11-19 08:07:51,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:07:51,897 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:07:51,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 08:07:52,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 08:07:52,121 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:07:52,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:07:52,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1457076396, now seen corresponding path program 1 times [2023-11-19 08:07:52,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:07:52,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601471110] [2023-11-19 08:07:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:52,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:07:52,178 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:07:52,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259870070] [2023-11-19 08:07:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:07:52,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:07:52,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:07:52,180 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:07:52,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a20a0dca-0d53-470a-acd8-520adaf23e35/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 08:07:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:07:52,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 08:07:52,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:07:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1741 proven. 78 refuted. 0 times theorem prover too weak. 1965 trivial. 0 not checked. [2023-11-19 08:07:53,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:07:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 87 proven. 42 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2023-11-19 08:07:53,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:07:53,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601471110] [2023-11-19 08:07:53,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:07:53,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259870070] [2023-11-19 08:07:53,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259870070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:07:53,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:07:53,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-11-19 08:07:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020932206] [2023-11-19 08:07:53,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:07:53,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 08:07:53,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:07:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 08:07:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:07:53,693 INFO L87 Difference]: Start difference. First operand 4510 states and 6958 transitions. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 18 states have internal predecessors, (130), 4 states have call successors, (58), 3 states have call predecessors, (58), 5 states have return successors, (59), 4 states have call predecessors, (59), 4 states have call successors, (59)