./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-62.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/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_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-62.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/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_9390049b-cb57-4cb2-a957-8232c7701ff3/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 3270c8118d1f3bdb2a198b4b5aa7f84c93b7a61bdca0993e970b844057a9b636 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:03:30,391 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:03:30,505 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:03:30,512 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:03:30,512 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:03:30,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:03:30,566 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:03:30,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:03:30,568 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:03:30,573 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:03:30,574 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:03:30,575 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:03:30,575 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:03:30,577 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:03:30,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:03:30,578 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:03:30,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:03:30,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:03:30,579 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:03:30,580 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:03:30,580 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:03:30,581 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:03:30,581 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:03:30,582 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:03:30,582 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:03:30,583 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:03:30,584 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:03:30,584 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:03:30,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:30,585 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:03:30,587 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:03:30,587 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:03:30,587 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:03:30,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:03:30,588 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:03:30,588 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:03:30,588 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:03:30,589 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:03:30,589 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:03:30,589 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_9390049b-cb57-4cb2-a957-8232c7701ff3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3270c8118d1f3bdb2a198b4b5aa7f84c93b7a61bdca0993e970b844057a9b636 [2023-11-19 08:03:30,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:03:30,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:03:30,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:03:30,948 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:03:30,949 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:03:30,950 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-62.i [2023-11-19 08:03:34,181 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:03:34,604 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:03:34,604 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-62.i [2023-11-19 08:03:34,619 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/data/2f23c4395/4e16a826e04f412a9feeb6349d56f02c/FLAGd35734c58 [2023-11-19 08:03:34,635 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/data/2f23c4395/4e16a826e04f412a9feeb6349d56f02c [2023-11-19 08:03:34,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:03:34,639 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:03:34,641 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:34,641 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:03:34,647 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:03:34,648 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:34" (1/1) ... [2023-11-19 08:03:34,649 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f6cd214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:34, skipping insertion in model container [2023-11-19 08:03:34,650 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:34" (1/1) ... [2023-11-19 08:03:34,710 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:03:34,919 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_9390049b-cb57-4cb2-a957-8232c7701ff3/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-62.i[916,929] [2023-11-19 08:03:35,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:35,224 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:03:35,241 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_9390049b-cb57-4cb2-a957-8232c7701ff3/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-62.i[916,929] [2023-11-19 08:03:35,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:35,396 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:03:35,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35 WrapperNode [2023-11-19 08:03:35,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:35,398 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:35,398 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:03:35,399 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:03:35,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,434 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,506 INFO L138 Inliner]: procedures = 26, calls = 69, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 457 [2023-11-19 08:03:35,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:35,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:03:35,508 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:03:35,508 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:03:35,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,537 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,588 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,594 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,600 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,607 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:03:35,642 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:03:35,654 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:03:35,654 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:03:35,655 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (1/1) ... [2023-11-19 08:03:35,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:35,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:35,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:03:35,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:03:35,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:03:35,750 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:03:35,751 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:03:35,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:03:35,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:03:35,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:03:35,945 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:03:35,947 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:03:36,964 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:03:37,000 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:03:37,000 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:03:37,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:37 BoogieIcfgContainer [2023-11-19 08:03:37,005 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:03:37,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:03:37,008 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:03:37,011 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:03:37,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:34" (1/3) ... [2023-11-19 08:03:37,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ff0867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:37, skipping insertion in model container [2023-11-19 08:03:37,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:35" (2/3) ... [2023-11-19 08:03:37,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ff0867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:37, skipping insertion in model container [2023-11-19 08:03:37,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:37" (3/3) ... [2023-11-19 08:03:37,018 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-62.i [2023-11-19 08:03:37,033 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:03:37,033 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:03:37,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:03:37,101 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;@1762079d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:03:37,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:03:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 124 states have (on average 1.4838709677419355) internal successors, (184), 125 states have internal predecessors, (184), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-19 08:03:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-19 08:03:37,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:37,139 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:37,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:37,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1990165036, now seen corresponding path program 1 times [2023-11-19 08:03:37,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:37,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247990902] [2023-11-19 08:03:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:37,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:37,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:37,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247990902] [2023-11-19 08:03:37,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:03:37,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004171086] [2023-11-19 08:03:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:37,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:37,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:37,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:37,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:03:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:37,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:03:37,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2023-11-19 08:03:38,087 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:38,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004171086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:38,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:38,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:03:38,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759844500] [2023-11-19 08:03:38,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:38,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:03:38,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:03:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:03:38,138 INFO L87 Difference]: Start difference. First operand has 183 states, 124 states have (on average 1.4838709677419355) internal successors, (184), 125 states have internal predecessors, (184), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) [2023-11-19 08:03:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:38,204 INFO L93 Difference]: Finished difference Result 359 states and 642 transitions. [2023-11-19 08:03:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:03:38,206 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) Word has length 369 [2023-11-19 08:03:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:38,219 INFO L225 Difference]: With dead ends: 359 [2023-11-19 08:03:38,219 INFO L226 Difference]: Without dead ends: 179 [2023-11-19 08:03:38,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 368 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 08:03:38,230 INFO L413 NwaCegarLoop]: 287 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, 287 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 08:03:38,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-19 08:03:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-11-19 08:03:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 121 states have (on average 1.4462809917355373) internal successors, (175), 121 states have internal predecessors, (175), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-19 08:03:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 287 transitions. [2023-11-19 08:03:38,306 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 287 transitions. Word has length 369 [2023-11-19 08:03:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:38,307 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 287 transitions. [2023-11-19 08:03:38,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 2 states have call successors, (56) [2023-11-19 08:03:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 287 transitions. [2023-11-19 08:03:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-19 08:03:38,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:38,318 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:38,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:38,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:03:38,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:38,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:38,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1024298216, now seen corresponding path program 1 times [2023-11-19 08:03:38,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:38,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761830095] [2023-11-19 08:03:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:38,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:38,743 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:38,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241459169] [2023-11-19 08:03:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:38,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:38,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:38,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:38,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:03:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:39,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:03:39,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:03:39,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:39,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:39,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761830095] [2023-11-19 08:03:39,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:39,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241459169] [2023-11-19 08:03:39,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241459169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:39,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:39,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:03:39,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987710219] [2023-11-19 08:03:39,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:39,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:39,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:39,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:39,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:03:39,247 INFO L87 Difference]: Start difference. First operand 179 states and 287 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:03:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:39,305 INFO L93 Difference]: Finished difference Result 355 states and 571 transitions. [2023-11-19 08:03:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:03:39,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 369 [2023-11-19 08:03:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:39,312 INFO L225 Difference]: With dead ends: 355 [2023-11-19 08:03:39,312 INFO L226 Difference]: Without dead ends: 179 [2023-11-19 08:03:39,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:03:39,317 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 77 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:39,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 769 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-19 08:03:39,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-11-19 08:03:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 121 states have (on average 1.43801652892562) internal successors, (174), 121 states have internal predecessors, (174), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-19 08:03:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 286 transitions. [2023-11-19 08:03:39,377 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 286 transitions. Word has length 369 [2023-11-19 08:03:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:39,385 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 286 transitions. [2023-11-19 08:03:39,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:03:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 286 transitions. [2023-11-19 08:03:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-19 08:03:39,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:39,396 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:39,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:39,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:39,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:39,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:39,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1683829738, now seen corresponding path program 1 times [2023-11-19 08:03:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:39,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609162787] [2023-11-19 08:03:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:39,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:39,754 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107344102] [2023-11-19 08:03:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:39,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:39,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:39,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:39,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:03:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:40,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:03:40,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:03:40,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:40,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:40,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609162787] [2023-11-19 08:03:40,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:40,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107344102] [2023-11-19 08:03:40,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107344102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:40,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:40,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:40,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202951715] [2023-11-19 08:03:40,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:40,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:40,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:40,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:40,232 INFO L87 Difference]: Start difference. First operand 179 states and 286 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:03:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:40,387 INFO L93 Difference]: Finished difference Result 514 states and 822 transitions. [2023-11-19 08:03:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 369 [2023-11-19 08:03:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:40,403 INFO L225 Difference]: With dead ends: 514 [2023-11-19 08:03:40,403 INFO L226 Difference]: Without dead ends: 338 [2023-11-19 08:03:40,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 367 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 08:03:40,410 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 251 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:40,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 771 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:03:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-19 08:03:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 197. [2023-11-19 08:03:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.4676258992805755) internal successors, (204), 139 states have internal predecessors, (204), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-19 08:03:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 316 transitions. [2023-11-19 08:03:40,482 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 316 transitions. Word has length 369 [2023-11-19 08:03:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:40,484 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 316 transitions. [2023-11-19 08:03:40,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:03:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 316 transitions. [2023-11-19 08:03:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-19 08:03:40,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:40,491 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:40,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:40,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:40,704 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:40,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1768202502, now seen corresponding path program 1 times [2023-11-19 08:03:40,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:40,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766773673] [2023-11-19 08:03:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:40,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:40,801 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:40,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795699111] [2023-11-19 08:03:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:40,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:40,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:40,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:40,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:03:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:41,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:03:41,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:03:42,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766773673] [2023-11-19 08:03:42,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795699111] [2023-11-19 08:03:42,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795699111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:42,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:42,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:03:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199874234] [2023-11-19 08:03:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:42,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:03:42,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:42,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:03:42,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:42,728 INFO L87 Difference]: Start difference. First operand 197 states and 316 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:03:43,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:43,213 INFO L93 Difference]: Finished difference Result 608 states and 980 transitions. [2023-11-19 08:03:43,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:03:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 370 [2023-11-19 08:03:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:43,220 INFO L225 Difference]: With dead ends: 608 [2023-11-19 08:03:43,220 INFO L226 Difference]: Without dead ends: 414 [2023-11-19 08:03:43,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:03:43,222 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 229 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:43,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 963 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:03:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-11-19 08:03:43,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 338. [2023-11-19 08:03:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 223 states have (on average 1.4080717488789238) internal successors, (314), 223 states have internal predecessors, (314), 112 states have call successors, (112), 2 states have call predecessors, (112), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-19 08:03:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 538 transitions. [2023-11-19 08:03:43,308 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 538 transitions. Word has length 370 [2023-11-19 08:03:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:43,311 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 538 transitions. [2023-11-19 08:03:43,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:03:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 538 transitions. [2023-11-19 08:03:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-11-19 08:03:43,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:43,318 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:43,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:43,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:43,532 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:43,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:43,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1418511524, now seen corresponding path program 1 times [2023-11-19 08:03:43,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:43,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713179062] [2023-11-19 08:03:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:43,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:43,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:43,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375467115] [2023-11-19 08:03:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:43,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:43,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:43,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:43,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:03:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:44,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 08:03:44,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 4269 proven. 213 refuted. 0 times theorem prover too weak. 1678 trivial. 0 not checked. [2023-11-19 08:03:45,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 411 proven. 231 refuted. 0 times theorem prover too weak. 5518 trivial. 0 not checked. [2023-11-19 08:03:46,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:46,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713179062] [2023-11-19 08:03:46,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:46,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375467115] [2023-11-19 08:03:46,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375467115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:46,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:03:46,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-19 08:03:46,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121840389] [2023-11-19 08:03:46,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:46,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 08:03:46,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 08:03:46,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:03:46,525 INFO L87 Difference]: Start difference. First operand 338 states and 538 transitions. Second operand has 25 states, 25 states have (on average 7.24) internal successors, (181), 25 states have internal predecessors, (181), 8 states have call successors, (96), 5 states have call predecessors, (96), 12 states have return successors, (97), 8 states have call predecessors, (97), 8 states have call successors, (97) [2023-11-19 08:03:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:48,002 INFO L93 Difference]: Finished difference Result 584 states and 895 transitions. [2023-11-19 08:03:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 08:03:48,004 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.24) internal successors, (181), 25 states have internal predecessors, (181), 8 states have call successors, (96), 5 states have call predecessors, (96), 12 states have return successors, (97), 8 states have call predecessors, (97), 8 states have call successors, (97) Word has length 371 [2023-11-19 08:03:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:48,010 INFO L225 Difference]: With dead ends: 584 [2023-11-19 08:03:48,010 INFO L226 Difference]: Without dead ends: 390 [2023-11-19 08:03:48,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 716 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=473, Invalid=1009, Unknown=0, NotChecked=0, Total=1482 [2023-11-19 08:03:48,013 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 683 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:48,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 897 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 08:03:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-19 08:03:48,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 370. [2023-11-19 08:03:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 247 states have (on average 1.360323886639676) internal successors, (336), 247 states have internal predecessors, (336), 112 states have call successors, (112), 10 states have call predecessors, (112), 10 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-19 08:03:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 560 transitions. [2023-11-19 08:03:48,114 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 560 transitions. Word has length 371 [2023-11-19 08:03:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:48,115 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 560 transitions. [2023-11-19 08:03:48,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.24) internal successors, (181), 25 states have internal predecessors, (181), 8 states have call successors, (96), 5 states have call predecessors, (96), 12 states have return successors, (97), 8 states have call predecessors, (97), 8 states have call successors, (97) [2023-11-19 08:03:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 560 transitions. [2023-11-19 08:03:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-19 08:03:48,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:48,122 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:48,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:48,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:48,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:48,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:48,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1901215606, now seen corresponding path program 1 times [2023-11-19 08:03:48,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:48,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464139086] [2023-11-19 08:03:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:48,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:48,415 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:48,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570059396] [2023-11-19 08:03:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:48,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:48,417 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:48,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:03:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:48,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:03:48,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 1065 proven. 150 refuted. 0 times theorem prover too weak. 4945 trivial. 0 not checked. [2023-11-19 08:03:49,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-19 08:03:50,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464139086] [2023-11-19 08:03:50,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570059396] [2023-11-19 08:03:50,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570059396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:50,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:03:50,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 08:03:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817034468] [2023-11-19 08:03:50,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:50,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 08:03:50,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:50,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 08:03:50,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:03:50,059 INFO L87 Difference]: Start difference. First operand 370 states and 560 transitions. Second operand has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 3 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 3 states have call predecessors, (107), 3 states have call successors, (107) [2023-11-19 08:03:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:51,050 INFO L93 Difference]: Finished difference Result 707 states and 1066 transitions. [2023-11-19 08:03:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:03:51,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 3 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 3 states have call predecessors, (107), 3 states have call successors, (107) Word has length 372 [2023-11-19 08:03:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:51,057 INFO L225 Difference]: With dead ends: 707 [2023-11-19 08:03:51,057 INFO L226 Difference]: Without dead ends: 497 [2023-11-19 08:03:51,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:03:51,060 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 1021 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:51,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1028 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 08:03:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-11-19 08:03:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 482. [2023-11-19 08:03:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 351 states have (on average 1.4017094017094016) internal successors, (492), 352 states have internal predecessors, (492), 117 states have call successors, (117), 13 states have call predecessors, (117), 13 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-19 08:03:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 726 transitions. [2023-11-19 08:03:51,160 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 726 transitions. Word has length 372 [2023-11-19 08:03:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:51,162 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 726 transitions. [2023-11-19 08:03:51,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 3 states have call successors, (106), 2 states have call predecessors, (106), 4 states have return successors, (107), 3 states have call predecessors, (107), 3 states have call successors, (107) [2023-11-19 08:03:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 726 transitions. [2023-11-19 08:03:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-19 08:03:51,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:51,167 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:51,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:51,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:03:51,392 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:51,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:51,393 INFO L85 PathProgramCache]: Analyzing trace with hash 703748035, now seen corresponding path program 1 times [2023-11-19 08:03:51,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:51,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465273938] [2023-11-19 08:03:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:51,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:51,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:51,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275166916] [2023-11-19 08:03:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:51,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:51,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:51,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:51,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:03:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:51,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:03:51,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:03:52,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:52,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465273938] [2023-11-19 08:03:52,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:52,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275166916] [2023-11-19 08:03:52,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275166916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:52,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:52,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:52,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959884933] [2023-11-19 08:03:52,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:52,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:52,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:52,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:52,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:03:52,521 INFO L87 Difference]: Start difference. First operand 482 states and 726 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:03:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:52,604 INFO L93 Difference]: Finished difference Result 786 states and 1192 transitions. [2023-11-19 08:03:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:03:52,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 373 [2023-11-19 08:03:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:52,612 INFO L225 Difference]: With dead ends: 786 [2023-11-19 08:03:52,612 INFO L226 Difference]: Without dead ends: 482 [2023-11-19 08:03:52,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 370 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 08:03:52,615 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 143 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:52,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 508 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:03:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-11-19 08:03:52,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2023-11-19 08:03:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 351 states have (on average 1.396011396011396) internal successors, (490), 352 states have internal predecessors, (490), 117 states have call successors, (117), 13 states have call predecessors, (117), 13 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-19 08:03:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 724 transitions. [2023-11-19 08:03:52,709 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 724 transitions. Word has length 373 [2023-11-19 08:03:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:52,710 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 724 transitions. [2023-11-19 08:03:52,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:03:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 724 transitions. [2023-11-19 08:03:52,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-11-19 08:03:52,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:52,715 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:52,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:52,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:03:52,928 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:52,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1942826452, now seen corresponding path program 1 times [2023-11-19 08:03:52,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:52,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98520345] [2023-11-19 08:03:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:52,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:53,011 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:53,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855638761] [2023-11-19 08:03:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:53,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:53,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:53,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:53,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:03:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:53,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:03:53,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3151 proven. 252 refuted. 0 times theorem prover too weak. 2757 trivial. 0 not checked. [2023-11-19 08:03:55,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 72 proven. 255 refuted. 0 times theorem prover too weak. 5833 trivial. 0 not checked. [2023-11-19 08:03:55,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:55,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98520345] [2023-11-19 08:03:55,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:55,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855638761] [2023-11-19 08:03:55,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855638761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:55,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:03:55,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-11-19 08:03:55,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205005480] [2023-11-19 08:03:55,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:55,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 08:03:55,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:55,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 08:03:55,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:03:55,889 INFO L87 Difference]: Start difference. First operand 482 states and 724 transitions. Second operand has 20 states, 20 states have (on average 8.7) internal successors, (174), 20 states have internal predecessors, (174), 5 states have call successors, (108), 3 states have call predecessors, (108), 7 states have return successors, (109), 5 states have call predecessors, (109), 5 states have call successors, (109) [2023-11-19 08:03:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:57,908 INFO L93 Difference]: Finished difference Result 1013 states and 1509 transitions. [2023-11-19 08:03:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 08:03:57,909 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.7) internal successors, (174), 20 states have internal predecessors, (174), 5 states have call successors, (108), 3 states have call predecessors, (108), 7 states have return successors, (109), 5 states have call predecessors, (109), 5 states have call successors, (109) Word has length 374 [2023-11-19 08:03:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:57,918 INFO L225 Difference]: With dead ends: 1013 [2023-11-19 08:03:57,918 INFO L226 Difference]: Without dead ends: 709 [2023-11-19 08:03:57,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2023-11-19 08:03:57,921 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 787 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:57,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 1563 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 08:03:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2023-11-19 08:03:57,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 529. [2023-11-19 08:03:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 389 states have (on average 1.3701799485861184) internal successors, (533), 390 states have internal predecessors, (533), 117 states have call successors, (117), 22 states have call predecessors, (117), 22 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-19 08:03:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 767 transitions. [2023-11-19 08:03:58,007 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 767 transitions. Word has length 374 [2023-11-19 08:03:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:58,008 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 767 transitions. [2023-11-19 08:03:58,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.7) internal successors, (174), 20 states have internal predecessors, (174), 5 states have call successors, (108), 3 states have call predecessors, (108), 7 states have return successors, (109), 5 states have call predecessors, (109), 5 states have call successors, (109) [2023-11-19 08:03:58,008 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 767 transitions. [2023-11-19 08:03:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-11-19 08:03:58,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:58,012 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:58,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:58,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:58,222 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:58,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1920194198, now seen corresponding path program 1 times [2023-11-19 08:03:58,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:58,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729017208] [2023-11-19 08:03:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:58,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:58,288 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:58,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263349395] [2023-11-19 08:03:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:58,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:58,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:58,290 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:58,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:03:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:58,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:03:58,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:03:59,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:59,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:59,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729017208] [2023-11-19 08:03:59,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:59,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263349395] [2023-11-19 08:03:59,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263349395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:59,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:59,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:03:59,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42057017] [2023-11-19 08:03:59,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:59,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:03:59,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:03:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:59,345 INFO L87 Difference]: Start difference. First operand 529 states and 767 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:03:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:59,766 INFO L93 Difference]: Finished difference Result 1306 states and 1920 transitions. [2023-11-19 08:03:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:03:59,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 374 [2023-11-19 08:03:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:59,775 INFO L225 Difference]: With dead ends: 1306 [2023-11-19 08:03:59,776 INFO L226 Difference]: Without dead ends: 971 [2023-11-19 08:03:59,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:03:59,780 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 305 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:59,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1153 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:03:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2023-11-19 08:03:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 789. [2023-11-19 08:03:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 576 states have (on average 1.3628472222222223) internal successors, (785), 578 states have internal predecessors, (785), 178 states have call successors, (178), 34 states have call predecessors, (178), 34 states have return successors, (178), 176 states have call predecessors, (178), 178 states have call successors, (178) [2023-11-19 08:03:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1141 transitions. [2023-11-19 08:03:59,917 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1141 transitions. Word has length 374 [2023-11-19 08:03:59,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:59,918 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1141 transitions. [2023-11-19 08:03:59,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:03:59,918 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1141 transitions. [2023-11-19 08:03:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-11-19 08:03:59,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:59,922 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:03:59,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:00,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:00,136 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:00,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:00,137 INFO L85 PathProgramCache]: Analyzing trace with hash 529252505, now seen corresponding path program 1 times [2023-11-19 08:04:00,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:00,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309131895] [2023-11-19 08:04:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:00,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:00,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:00,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111925338] [2023-11-19 08:04:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:00,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:00,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:00,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:00,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:04:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:00,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:04:00,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-19 08:04:00,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:00,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:00,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309131895] [2023-11-19 08:04:00,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:00,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111925338] [2023-11-19 08:04:00,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111925338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:00,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:00,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:04:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971210195] [2023-11-19 08:04:00,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:00,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:04:00,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:04:00,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:04:00,892 INFO L87 Difference]: Start difference. First operand 789 states and 1141 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 1 states have call successors, (56), 1 states have call predecessors, (56), 2 states have return successors, (56), 2 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:04:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:01,939 INFO L93 Difference]: Finished difference Result 1108 states and 1588 transitions. [2023-11-19 08:04:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 08:04:01,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 1 states have call successors, (56), 1 states have call predecessors, (56), 2 states have return successors, (56), 2 states have call predecessors, (56), 1 states have call successors, (56) Word has length 375 [2023-11-19 08:04:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:01,945 INFO L225 Difference]: With dead ends: 1108 [2023-11-19 08:04:01,945 INFO L226 Difference]: Without dead ends: 513 [2023-11-19 08:04:01,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-19 08:04:01,948 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 352 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:01,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 941 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 08:04:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-11-19 08:04:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 490. [2023-11-19 08:04:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 349 states have (on average 1.3065902578796562) internal successors, (456), 350 states have internal predecessors, (456), 117 states have call successors, (117), 23 states have call predecessors, (117), 23 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-19 08:04:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 690 transitions. [2023-11-19 08:04:02,054 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 690 transitions. Word has length 375 [2023-11-19 08:04:02,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:02,055 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 690 transitions. [2023-11-19 08:04:02,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 1 states have call successors, (56), 1 states have call predecessors, (56), 2 states have return successors, (56), 2 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:04:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 690 transitions. [2023-11-19 08:04:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-11-19 08:04:02,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:02,059 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:02,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:02,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:04:02,269 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:02,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:02,270 INFO L85 PathProgramCache]: Analyzing trace with hash 21590347, now seen corresponding path program 1 times [2023-11-19 08:04:02,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:02,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705569986] [2023-11-19 08:04:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:02,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:02,336 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:02,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035012431] [2023-11-19 08:04:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:02,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:02,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:02,338 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:02,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:04:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:02,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:04:02,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-19 08:04:02,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:04:02,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:02,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705569986] [2023-11-19 08:04:02,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:02,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035012431] [2023-11-19 08:04:02,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035012431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:02,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:02,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:02,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269103497] [2023-11-19 08:04:02,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:02,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:02,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:02,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:02,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:02,803 INFO L87 Difference]: Start difference. First operand 490 states and 690 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:04:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:02,893 INFO L93 Difference]: Finished difference Result 778 states and 1098 transitions. [2023-11-19 08:04:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:02,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 375 [2023-11-19 08:04:02,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:02,899 INFO L225 Difference]: With dead ends: 778 [2023-11-19 08:04:02,899 INFO L226 Difference]: Without dead ends: 490 [2023-11-19 08:04:02,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 373 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 08:04:02,901 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 1 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:02,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 533 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:04:02,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-11-19 08:04:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2023-11-19 08:04:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 349 states have (on average 1.3008595988538683) internal successors, (454), 350 states have internal predecessors, (454), 117 states have call successors, (117), 23 states have call predecessors, (117), 23 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-19 08:04:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 688 transitions. [2023-11-19 08:04:02,972 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 688 transitions. Word has length 375 [2023-11-19 08:04:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:02,973 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 688 transitions. [2023-11-19 08:04:02,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-19 08:04:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 688 transitions. [2023-11-19 08:04:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-11-19 08:04:02,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:02,978 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:03,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:03,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:03,199 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:03,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:03,199 INFO L85 PathProgramCache]: Analyzing trace with hash 701648717, now seen corresponding path program 1 times [2023-11-19 08:04:03,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:03,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685223162] [2023-11-19 08:04:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:03,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:03,288 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:03,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704600623] [2023-11-19 08:04:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:03,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:03,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:03,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:03,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:04:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:03,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:04:03,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 1117 proven. 294 refuted. 0 times theorem prover too weak. 4749 trivial. 0 not checked. [2023-11-19 08:04:05,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-19 08:04:05,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:05,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685223162] [2023-11-19 08:04:05,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:05,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704600623] [2023-11-19 08:04:05,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704600623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:04:05,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:04:05,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-11-19 08:04:05,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145693450] [2023-11-19 08:04:05,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:05,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:04:05,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:05,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:04:05,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:04:05,961 INFO L87 Difference]: Start difference. First operand 490 states and 688 transitions. Second operand has 15 states, 15 states have (on average 11.4) internal successors, (171), 14 states have internal predecessors, (171), 4 states have call successors, (106), 3 states have call predecessors, (106), 5 states have return successors, (107), 4 states have call predecessors, (107), 4 states have call successors, (107) [2023-11-19 08:04:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:06,926 INFO L93 Difference]: Finished difference Result 805 states and 1118 transitions. [2023-11-19 08:04:06,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:04:06,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.4) internal successors, (171), 14 states have internal predecessors, (171), 4 states have call successors, (106), 3 states have call predecessors, (106), 5 states have return successors, (107), 4 states have call predecessors, (107), 4 states have call successors, (107) Word has length 375 [2023-11-19 08:04:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:06,931 INFO L225 Difference]: With dead ends: 805 [2023-11-19 08:04:06,932 INFO L226 Difference]: Without dead ends: 517 [2023-11-19 08:04:06,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2023-11-19 08:04:06,934 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 380 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:06,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 889 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 08:04:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2023-11-19 08:04:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 498. [2023-11-19 08:04:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 355 states have (on average 1.2901408450704226) internal successors, (458), 356 states have internal predecessors, (458), 117 states have call successors, (117), 25 states have call predecessors, (117), 25 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-19 08:04:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 692 transitions. [2023-11-19 08:04:07,012 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 692 transitions. Word has length 375 [2023-11-19 08:04:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:07,013 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 692 transitions. [2023-11-19 08:04:07,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.4) internal successors, (171), 14 states have internal predecessors, (171), 4 states have call successors, (106), 3 states have call predecessors, (106), 5 states have return successors, (107), 4 states have call predecessors, (107), 4 states have call successors, (107) [2023-11-19 08:04:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 692 transitions. [2023-11-19 08:04:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-11-19 08:04:07,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:07,017 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:07,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:07,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 08:04:07,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:07,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:07,241 INFO L85 PathProgramCache]: Analyzing trace with hash 763688331, now seen corresponding path program 1 times [2023-11-19 08:04:07,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:07,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814788957] [2023-11-19 08:04:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:07,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:07,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:07,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348797665] [2023-11-19 08:04:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:07,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:07,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:07,340 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:07,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 08:04:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:07,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 08:04:07,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:09,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3858 proven. 480 refuted. 0 times theorem prover too weak. 1822 trivial. 0 not checked. [2023-11-19 08:04:09,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:10,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:10,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814788957] [2023-11-19 08:04:10,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:04:10,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348797665] [2023-11-19 08:04:10,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348797665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:04:10,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:04:10,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-19 08:04:10,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634272839] [2023-11-19 08:04:10,282 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 08:04:10,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:04:10,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:10,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:04:10,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=147, Unknown=1, NotChecked=0, Total=210 [2023-11-19 08:04:10,285 INFO L87 Difference]: Start difference. First operand 498 states and 692 transitions. Second operand has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (56), 4 states have call predecessors, (56), 6 states have return successors, (56), 4 states have call predecessors, (56), 4 states have call successors, (56) [2023-11-19 08:04:11,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:04:11,377 INFO L93 Difference]: Finished difference Result 1347 states and 1874 transitions. [2023-11-19 08:04:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 08:04:11,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (56), 4 states have call predecessors, (56), 6 states have return successors, (56), 4 states have call predecessors, (56), 4 states have call successors, (56) Word has length 375 [2023-11-19 08:04:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:04:11,386 INFO L225 Difference]: With dead ends: 1347 [2023-11-19 08:04:11,386 INFO L226 Difference]: Without dead ends: 1003 [2023-11-19 08:04:11,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=560, Unknown=1, NotChecked=0, Total=812 [2023-11-19 08:04:11,389 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 627 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:04:11,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1283 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 08:04:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2023-11-19 08:04:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 859. [2023-11-19 08:04:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 637 states have (on average 1.2998430141287285) internal successors, (828), 639 states have internal predecessors, (828), 178 states have call successors, (178), 43 states have call predecessors, (178), 43 states have return successors, (178), 176 states have call predecessors, (178), 178 states have call successors, (178) [2023-11-19 08:04:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1184 transitions. [2023-11-19 08:04:11,523 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1184 transitions. Word has length 375 [2023-11-19 08:04:11,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:04:11,524 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1184 transitions. [2023-11-19 08:04:11,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (56), 4 states have call predecessors, (56), 6 states have return successors, (56), 4 states have call predecessors, (56), 4 states have call successors, (56) [2023-11-19 08:04:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1184 transitions. [2023-11-19 08:04:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-11-19 08:04:11,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:04:11,529 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:11,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 08:04:11,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 08:04:11,730 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:04:11,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:11,731 INFO L85 PathProgramCache]: Analyzing trace with hash 282608073, now seen corresponding path program 1 times [2023-11-19 08:04:11,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:11,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606749714] [2023-11-19 08:04:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:11,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:11,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:04:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586291735] [2023-11-19 08:04:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:11,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:04:11,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:11,794 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:04:11,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9390049b-cb57-4cb2-a957-8232c7701ff3/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 08:04:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:12,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:04:12,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:04:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2433 proven. 42 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2023-11-19 08:04:12,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:04:16,116 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_~var_1_58~0 65536))) (let ((.cse1 (+ .cse2 1)) (.cse0 (mod c_~var_1_7~0 4294967296))) (and (or (< 4294967294 .cse0) (and (forall ((v_z_55 Int)) (or (< 255 v_z_55) (< v_z_55 .cse1) (< (mod (div .cse0 v_z_55) 4294967296) 1))) (<= (mod (div .cse0 .cse2) 4294967296) 0))) (forall ((v_z_48 Int) (v_z_53 Int)) (or (< .cse0 v_z_53) (< 255 v_z_48) (< v_z_48 .cse1) (< v_z_53 0) (< (mod (div v_z_53 v_z_48) 4294967296) 1))) (forall ((v_z_52 Int)) (or (< (mod (div v_z_52 .cse2) 4294967296) 1) (< .cse0 v_z_52) (< v_z_52 0)))))) is different from false