./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-89.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/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_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-89.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/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_b51b09be-d955-4f70-804f-ea856c86fed1/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 341cfc181a184dfd888895046689be86cf5a3b257f2774b185252ff7e72de492 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:23,517 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:23,597 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:01:23,603 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:23,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:23,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:23,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:23,630 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:23,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:23,632 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:23,633 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:23,634 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:23,634 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:23,635 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:23,636 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:01:23,636 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:23,637 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:23,638 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:23,638 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:23,639 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:01:23,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:23,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:01:23,641 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:23,642 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:01:23,642 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:23,643 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:23,644 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:23,644 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:23,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:23,646 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:23,646 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:23,647 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:01:23,647 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:23,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:23,649 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:23,649 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:01:23,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:23,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:23,651 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:23,651 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_b51b09be-d955-4f70-804f-ea856c86fed1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 341cfc181a184dfd888895046689be86cf5a3b257f2774b185252ff7e72de492 [2023-11-19 08:01:23,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:24,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:24,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:24,010 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:24,011 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:24,013 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-89.i [2023-11-19 08:01:27,201 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:27,494 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:27,497 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-89.i [2023-11-19 08:01:27,511 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/data/3999a1941/1a84da6017ae4bc4b1e4cf47cf28cdcf/FLAGed6f69e23 [2023-11-19 08:01:27,527 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/data/3999a1941/1a84da6017ae4bc4b1e4cf47cf28cdcf [2023-11-19 08:01:27,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:27,531 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:27,533 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:27,533 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:27,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:27,540 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65cb7f96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:27, skipping insertion in model container [2023-11-19 08:01:27,542 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:27" (1/1) ... [2023-11-19 08:01:27,607 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:27,808 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_b51b09be-d955-4f70-804f-ea856c86fed1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-89.i[916,929] [2023-11-19 08:01:28,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:28,040 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:28,058 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_b51b09be-d955-4f70-804f-ea856c86fed1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-89.i[916,929] [2023-11-19 08:01:28,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:28,237 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:28,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28 WrapperNode [2023-11-19 08:01:28,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:28,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:28,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:28,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:28,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,287 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,349 INFO L138 Inliner]: procedures = 26, calls = 74, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 460 [2023-11-19 08:01:28,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:28,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:28,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:28,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:28,360 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,395 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,402 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,407 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,413 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,429 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:28,430 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:28,430 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:28,430 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:28,432 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (1/1) ... [2023-11-19 08:01:28,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:28,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:28,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:28,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:28,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:28,532 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:01:28,532 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:01:28,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:28,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:28,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:28,660 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:28,663 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:29,696 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:29,708 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:29,708 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:01:29,720 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:29 BoogieIcfgContainer [2023-11-19 08:01:29,720 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:29,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:29,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:29,727 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:29,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:27" (1/3) ... [2023-11-19 08:01:29,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb57f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:29, skipping insertion in model container [2023-11-19 08:01:29,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:28" (2/3) ... [2023-11-19 08:01:29,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb57f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:29, skipping insertion in model container [2023-11-19 08:01:29,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:29" (3/3) ... [2023-11-19 08:01:29,731 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-89.i [2023-11-19 08:01:29,750 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:29,751 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:01:29,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:29,814 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;@51cc0aab, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:29,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:01:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 127 states have (on average 1.5984251968503937) internal successors, (203), 128 states have internal predecessors, (203), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-19 08:01:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-19 08:01:29,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:29,864 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:29,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:29,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1848619048, now seen corresponding path program 1 times [2023-11-19 08:01:29,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:29,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057526624] [2023-11-19 08:01:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:29,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:30,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:30,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057526624] [2023-11-19 08:01:30,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:01:30,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839750947] [2023-11-19 08:01:30,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:30,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:30,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:30,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:30,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:01:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:30,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:01:30,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2023-11-19 08:01:30,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:30,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839750947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:30,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:30,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:30,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20852514] [2023-11-19 08:01:30,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:30,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:01:30,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:01:30,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:01:30,892 INFO L87 Difference]: Start difference. First operand has 191 states, 127 states have (on average 1.5984251968503937) internal successors, (203), 128 states have internal predecessors, (203), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-19 08:01:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:30,985 INFO L93 Difference]: Finished difference Result 375 states and 705 transitions. [2023-11-19 08:01:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:01:30,990 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) Word has length 390 [2023-11-19 08:01:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:31,006 INFO L225 Difference]: With dead ends: 375 [2023-11-19 08:01:31,006 INFO L226 Difference]: Without dead ends: 187 [2023-11-19 08:01:31,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 389 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 08:01:31,018 INFO L413 NwaCegarLoop]: 317 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, 317 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 08:01:31,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-19 08:01:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-11-19 08:01:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 124 states have (on average 1.5725806451612903) internal successors, (195), 124 states have internal predecessors, (195), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-19 08:01:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 317 transitions. [2023-11-19 08:01:31,088 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 317 transitions. Word has length 390 [2023-11-19 08:01:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:31,089 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 317 transitions. [2023-11-19 08:01:31,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-19 08:01:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 317 transitions. [2023-11-19 08:01:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-19 08:01:31,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:31,101 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:31,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:31,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:31,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:31,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2060636074, now seen corresponding path program 1 times [2023-11-19 08:01:31,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:31,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82122507] [2023-11-19 08:01:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:31,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:31,519 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:31,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242654494] [2023-11-19 08:01:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:31,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:31,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:31,522 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:31,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:01:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:31,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:01:31,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-19 08:01:32,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:32,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:32,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82122507] [2023-11-19 08:01:32,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:32,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242654494] [2023-11-19 08:01:32,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242654494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:32,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:32,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:32,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938759567] [2023-11-19 08:01:32,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:32,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:32,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:32,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:32,599 INFO L87 Difference]: Start difference. First operand 187 states and 317 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-19 08:01:32,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:32,681 INFO L93 Difference]: Finished difference Result 553 states and 941 transitions. [2023-11-19 08:01:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:32,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 390 [2023-11-19 08:01:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:32,690 INFO L225 Difference]: With dead ends: 553 [2023-11-19 08:01:32,690 INFO L226 Difference]: Without dead ends: 369 [2023-11-19 08:01:32,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 388 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 08:01:32,693 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 138 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:32,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 666 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:32,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-11-19 08:01:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2023-11-19 08:01:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 241 states have (on average 1.5601659751037344) internal successors, (376), 241 states have internal predecessors, (376), 122 states have call successors, (122), 2 states have call predecessors, (122), 2 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-19 08:01:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 620 transitions. [2023-11-19 08:01:32,816 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 620 transitions. Word has length 390 [2023-11-19 08:01:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:32,822 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 620 transitions. [2023-11-19 08:01:32,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-19 08:01:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 620 transitions. [2023-11-19 08:01:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-19 08:01:32,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:32,833 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:32,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:33,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:33,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:33,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:33,045 INFO L85 PathProgramCache]: Analyzing trace with hash -768203684, now seen corresponding path program 1 times [2023-11-19 08:01:33,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:33,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635342022] [2023-11-19 08:01:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:33,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:33,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:33,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647099403] [2023-11-19 08:01:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:33,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:33,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:33,179 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:33,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:01:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:33,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:01:33,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-19 08:01:33,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:33,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:33,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635342022] [2023-11-19 08:01:33,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647099403] [2023-11-19 08:01:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647099403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:33,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:33,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:33,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393607283] [2023-11-19 08:01:33,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:33,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:33,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:33,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:33,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:33,580 INFO L87 Difference]: Start difference. First operand 366 states and 620 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-19 08:01:33,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:33,667 INFO L93 Difference]: Finished difference Result 946 states and 1610 transitions. [2023-11-19 08:01:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 391 [2023-11-19 08:01:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:33,679 INFO L225 Difference]: With dead ends: 946 [2023-11-19 08:01:33,679 INFO L226 Difference]: Without dead ends: 583 [2023-11-19 08:01:33,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 389 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 08:01:33,684 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 163 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:33,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 643 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-11-19 08:01:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 579. [2023-11-19 08:01:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 408 states have (on average 1.5955882352941178) internal successors, (651), 410 states have internal predecessors, (651), 166 states have call successors, (166), 4 states have call predecessors, (166), 4 states have return successors, (166), 164 states have call predecessors, (166), 166 states have call successors, (166) [2023-11-19 08:01:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 983 transitions. [2023-11-19 08:01:33,835 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 983 transitions. Word has length 391 [2023-11-19 08:01:33,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:33,838 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 983 transitions. [2023-11-19 08:01:33,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-19 08:01:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 983 transitions. [2023-11-19 08:01:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-19 08:01:33,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:33,849 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:33,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:34,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:34,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:34,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1365625316, now seen corresponding path program 1 times [2023-11-19 08:01:34,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:34,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894595821] [2023-11-19 08:01:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:34,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:34,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:34,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241011118] [2023-11-19 08:01:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:34,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:34,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:34,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:34,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:01:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:34,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:01:34,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-19 08:01:34,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:34,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:34,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894595821] [2023-11-19 08:01:34,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:34,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241011118] [2023-11-19 08:01:34,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241011118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:34,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:34,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:01:34,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360943401] [2023-11-19 08:01:34,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:34,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:01:34,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:34,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:01:34,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:34,552 INFO L87 Difference]: Start difference. First operand 579 states and 983 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-19 08:01:34,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:34,707 INFO L93 Difference]: Finished difference Result 1286 states and 2196 transitions. [2023-11-19 08:01:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:01:34,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 391 [2023-11-19 08:01:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:34,722 INFO L225 Difference]: With dead ends: 1286 [2023-11-19 08:01:34,722 INFO L226 Difference]: Without dead ends: 995 [2023-11-19 08:01:34,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:34,730 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 193 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:34,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1084 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:01:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2023-11-19 08:01:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 989. [2023-11-19 08:01:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 750 states have (on average 1.6426666666666667) internal successors, (1232), 756 states have internal predecessors, (1232), 230 states have call successors, (230), 8 states have call predecessors, (230), 8 states have return successors, (230), 224 states have call predecessors, (230), 230 states have call successors, (230) [2023-11-19 08:01:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1692 transitions. [2023-11-19 08:01:34,862 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1692 transitions. Word has length 391 [2023-11-19 08:01:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:34,863 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 1692 transitions. [2023-11-19 08:01:34,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-19 08:01:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1692 transitions. [2023-11-19 08:01:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-19 08:01:34,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:34,877 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:34,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:35,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:35,104 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:35,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash -472138978, now seen corresponding path program 1 times [2023-11-19 08:01:35,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:35,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976687222] [2023-11-19 08:01:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:35,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:35,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:35,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388003372] [2023-11-19 08:01:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:35,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:35,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:35,173 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:35,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:01:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:35,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:01:35,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-19 08:01:35,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:35,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976687222] [2023-11-19 08:01:35,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388003372] [2023-11-19 08:01:35,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388003372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:35,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:35,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:35,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927794367] [2023-11-19 08:01:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:35,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:35,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:35,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:35,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:35,540 INFO L87 Difference]: Start difference. First operand 989 states and 1692 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-19 08:01:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:35,702 INFO L93 Difference]: Finished difference Result 2744 states and 4698 transitions. [2023-11-19 08:01:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 391 [2023-11-19 08:01:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:35,717 INFO L225 Difference]: With dead ends: 2744 [2023-11-19 08:01:35,717 INFO L226 Difference]: Without dead ends: 1758 [2023-11-19 08:01:35,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 389 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 08:01:35,721 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 180 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:35,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 704 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:01:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2023-11-19 08:01:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1748. [2023-11-19 08:01:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1389 states have (on average 1.6616270698344133) internal successors, (2308), 1403 states have internal predecessors, (2308), 342 states have call successors, (342), 16 states have call predecessors, (342), 16 states have return successors, (342), 328 states have call predecessors, (342), 342 states have call successors, (342) [2023-11-19 08:01:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2992 transitions. [2023-11-19 08:01:35,912 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2992 transitions. Word has length 391 [2023-11-19 08:01:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:35,913 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2992 transitions. [2023-11-19 08:01:35,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-19 08:01:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2992 transitions. [2023-11-19 08:01:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-19 08:01:35,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:35,919 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:35,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:36,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:36,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:36,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash 562647386, now seen corresponding path program 1 times [2023-11-19 08:01:36,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:36,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883981559] [2023-11-19 08:01:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:36,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:36,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:36,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391340013] [2023-11-19 08:01:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:36,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:36,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:36,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:01:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:36,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:01:36,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3708 proven. 84 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2023-11-19 08:01:37,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 96 proven. 84 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-19 08:01:38,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:38,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883981559] [2023-11-19 08:01:38,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:38,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391340013] [2023-11-19 08:01:38,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391340013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:38,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:38,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-19 08:01:38,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630132978] [2023-11-19 08:01:38,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:38,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:01:38,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:38,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:01:38,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:01:38,419 INFO L87 Difference]: Start difference. First operand 1748 states and 2992 transitions. Second operand has 11 states, 11 states have (on average 15.272727272727273) internal successors, (168), 11 states have internal predecessors, (168), 4 states have call successors, (122), 3 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) [2023-11-19 08:01:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:39,366 INFO L93 Difference]: Finished difference Result 4475 states and 7496 transitions. [2023-11-19 08:01:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:01:39,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.272727272727273) internal successors, (168), 11 states have internal predecessors, (168), 4 states have call successors, (122), 3 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) Word has length 391 [2023-11-19 08:01:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:39,390 INFO L225 Difference]: With dead ends: 4475 [2023-11-19 08:01:39,390 INFO L226 Difference]: Without dead ends: 2730 [2023-11-19 08:01:39,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:01:39,399 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 696 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:39,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 756 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 08:01:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2023-11-19 08:01:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2660. [2023-11-19 08:01:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2660 states, 2027 states have (on average 1.5836211149481993) internal successors, (3210), 2057 states have internal predecessors, (3210), 598 states have call successors, (598), 34 states have call predecessors, (598), 34 states have return successors, (598), 568 states have call predecessors, (598), 598 states have call successors, (598) [2023-11-19 08:01:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2660 states to 2660 states and 4406 transitions. [2023-11-19 08:01:39,710 INFO L78 Accepts]: Start accepts. Automaton has 2660 states and 4406 transitions. Word has length 391 [2023-11-19 08:01:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:39,712 INFO L495 AbstractCegarLoop]: Abstraction has 2660 states and 4406 transitions. [2023-11-19 08:01:39,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.272727272727273) internal successors, (168), 11 states have internal predecessors, (168), 4 states have call successors, (122), 3 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 4 states have call successors, (122) [2023-11-19 08:01:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2660 states and 4406 transitions. [2023-11-19 08:01:39,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-19 08:01:39,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:39,719 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:39,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:39,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:39,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:39,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash 960372834, now seen corresponding path program 1 times [2023-11-19 08:01:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:39,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248943403] [2023-11-19 08:01:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:39,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:40,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:40,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189234923] [2023-11-19 08:01:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:40,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:40,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:40,018 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:40,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:01:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:40,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:01:40,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3480 proven. 66 refuted. 0 times theorem prover too weak. 3774 trivial. 0 not checked. [2023-11-19 08:01:40,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 114 proven. 66 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-19 08:01:40,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:40,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248943403] [2023-11-19 08:01:40,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:40,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189234923] [2023-11-19 08:01:40,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189234923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:40,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:40,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:01:40,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211633860] [2023-11-19 08:01:40,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:40,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:01:40,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:40,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:01:40,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:01:40,939 INFO L87 Difference]: Start difference. First operand 2660 states and 4406 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-19 08:01:41,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:41,808 INFO L93 Difference]: Finished difference Result 5475 states and 8998 transitions. [2023-11-19 08:01:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:01:41,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 391 [2023-11-19 08:01:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:41,830 INFO L225 Difference]: With dead ends: 5475 [2023-11-19 08:01:41,831 INFO L226 Difference]: Without dead ends: 2818 [2023-11-19 08:01:41,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 774 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:01:41,839 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 197 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:41,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 790 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 08:01:41,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2023-11-19 08:01:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2747. [2023-11-19 08:01:42,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2069 states have (on average 1.540840985983567) internal successors, (3188), 2100 states have internal predecessors, (3188), 636 states have call successors, (636), 41 states have call predecessors, (636), 41 states have return successors, (636), 605 states have call predecessors, (636), 636 states have call successors, (636) [2023-11-19 08:01:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 4460 transitions. [2023-11-19 08:01:42,155 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 4460 transitions. Word has length 391 [2023-11-19 08:01:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:42,156 INFO L495 AbstractCegarLoop]: Abstraction has 2747 states and 4460 transitions. [2023-11-19 08:01:42,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-19 08:01:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 4460 transitions. [2023-11-19 08:01:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2023-11-19 08:01:42,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:42,164 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:42,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:42,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:42,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:42,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:42,385 INFO L85 PathProgramCache]: Analyzing trace with hash -962340505, now seen corresponding path program 1 times [2023-11-19 08:01:42,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:42,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232830220] [2023-11-19 08:01:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:42,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:42,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:42,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133376123] [2023-11-19 08:01:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:42,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:42,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:42,450 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:42,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:01:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:42,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:01:42,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 2080 proven. 150 refuted. 0 times theorem prover too weak. 5090 trivial. 0 not checked. [2023-11-19 08:01:43,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 30 proven. 150 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-19 08:01:43,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:43,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232830220] [2023-11-19 08:01:43,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:43,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133376123] [2023-11-19 08:01:43,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133376123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:43,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:43,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:01:43,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790641871] [2023-11-19 08:01:43,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:43,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:01:43,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:43,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:01:43,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:01:43,855 INFO L87 Difference]: Start difference. First operand 2747 states and 4460 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) [2023-11-19 08:01:44,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:44,483 INFO L93 Difference]: Finished difference Result 5680 states and 9040 transitions. [2023-11-19 08:01:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:01:44,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) Word has length 393 [2023-11-19 08:01:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:44,506 INFO L225 Difference]: With dead ends: 5680 [2023-11-19 08:01:44,506 INFO L226 Difference]: Without dead ends: 3015 [2023-11-19 08:01:44,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 778 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:01:44,517 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 235 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:44,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 606 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:01:44,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2023-11-19 08:01:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 2879. [2023-11-19 08:01:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2168 states have (on average 1.5013837638376384) internal successors, (3255), 2199 states have internal predecessors, (3255), 636 states have call successors, (636), 74 states have call predecessors, (636), 74 states have return successors, (636), 605 states have call predecessors, (636), 636 states have call successors, (636) [2023-11-19 08:01:44,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 4527 transitions. [2023-11-19 08:01:44,847 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 4527 transitions. Word has length 393 [2023-11-19 08:01:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:44,848 INFO L495 AbstractCegarLoop]: Abstraction has 2879 states and 4527 transitions. [2023-11-19 08:01:44,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 2 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 2 states have call predecessors, (112), 2 states have call successors, (112) [2023-11-19 08:01:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 4527 transitions. [2023-11-19 08:01:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2023-11-19 08:01:44,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:44,856 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:44,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:45,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:45,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:45,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:45,080 INFO L85 PathProgramCache]: Analyzing trace with hash -960493463, now seen corresponding path program 1 times [2023-11-19 08:01:45,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:45,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147417637] [2023-11-19 08:01:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:45,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:45,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:45,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862528201] [2023-11-19 08:01:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:45,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:45,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:45,156 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:45,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:01:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:45,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:01:45,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-19 08:01:45,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:45,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:45,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147417637] [2023-11-19 08:01:45,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:45,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862528201] [2023-11-19 08:01:45,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862528201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:45,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:45,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217162060] [2023-11-19 08:01:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:45,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:45,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:45,562 INFO L87 Difference]: Start difference. First operand 2879 states and 4527 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-19 08:01:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:45,989 INFO L93 Difference]: Finished difference Result 8465 states and 13345 transitions. [2023-11-19 08:01:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:45,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 393 [2023-11-19 08:01:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:46,030 INFO L225 Difference]: With dead ends: 8465 [2023-11-19 08:01:46,031 INFO L226 Difference]: Without dead ends: 5672 [2023-11-19 08:01:46,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 391 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 08:01:46,043 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 294 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:46,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 882 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2023-11-19 08:01:46,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 5670. [2023-11-19 08:01:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5670 states, 4293 states have (on average 1.5026787794083392) internal successors, (6451), 4354 states have internal predecessors, (6451), 1234 states have call successors, (1234), 142 states have call predecessors, (1234), 142 states have return successors, (1234), 1173 states have call predecessors, (1234), 1234 states have call successors, (1234) [2023-11-19 08:01:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 8919 transitions. [2023-11-19 08:01:46,748 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 8919 transitions. Word has length 393 [2023-11-19 08:01:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:46,749 INFO L495 AbstractCegarLoop]: Abstraction has 5670 states and 8919 transitions. [2023-11-19 08:01:46,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-19 08:01:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 8919 transitions. [2023-11-19 08:01:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2023-11-19 08:01:46,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:46,764 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:01:46,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:46,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:46,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:46,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:46,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2046300014, now seen corresponding path program 1 times [2023-11-19 08:01:46,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:46,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903038303] [2023-11-19 08:01:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:46,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:47,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:47,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667969281] [2023-11-19 08:01:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:47,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:47,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:47,071 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:47,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:01:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:47,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:01:47,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3320 proven. 120 refuted. 0 times theorem prover too weak. 3880 trivial. 0 not checked. [2023-11-19 08:01:49,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 60 proven. 120 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-19 08:01:51,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903038303] [2023-11-19 08:01:51,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667969281] [2023-11-19 08:01:51,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667969281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:51,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:51,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-19 08:01:51,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056044692] [2023-11-19 08:01:51,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:51,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 08:01:51,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 08:01:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:01:51,194 INFO L87 Difference]: Start difference. First operand 5670 states and 8919 transitions. Second operand has 20 states, 19 states have (on average 9.210526315789474) internal successors, (175), 20 states have internal predecessors, (175), 6 states have call successors, (122), 4 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 6 states have call successors, (122) [2023-11-19 08:02:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:00,527 INFO L93 Difference]: Finished difference Result 29041 states and 44387 transitions. [2023-11-19 08:02:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-19 08:02:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 9.210526315789474) internal successors, (175), 20 states have internal predecessors, (175), 6 states have call successors, (122), 4 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 6 states have call successors, (122) Word has length 394 [2023-11-19 08:02:00,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:00,686 INFO L225 Difference]: With dead ends: 29041 [2023-11-19 08:02:00,686 INFO L226 Difference]: Without dead ends: 26233 [2023-11-19 08:02:00,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3095 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2310, Invalid=6432, Unknown=0, NotChecked=0, Total=8742 [2023-11-19 08:02:00,712 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 2514 mSDsluCounter, 4364 mSDsCounter, 0 mSdLazyCounter, 3471 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2655 SdHoareTripleChecker+Valid, 4716 SdHoareTripleChecker+Invalid, 4230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 3471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:00,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2655 Valid, 4716 Invalid, 4230 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [759 Valid, 3471 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-19 08:02:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26233 states. [2023-11-19 08:02:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26233 to 11858. [2023-11-19 08:02:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11858 states, 8971 states have (on average 1.4768699141678743) internal successors, (13249), 9116 states have internal predecessors, (13249), 2496 states have call successors, (2496), 390 states have call predecessors, (2496), 390 states have return successors, (2496), 2351 states have call predecessors, (2496), 2496 states have call successors, (2496) [2023-11-19 08:02:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11858 states to 11858 states and 18241 transitions. [2023-11-19 08:02:02,746 INFO L78 Accepts]: Start accepts. Automaton has 11858 states and 18241 transitions. Word has length 394 [2023-11-19 08:02:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:02,747 INFO L495 AbstractCegarLoop]: Abstraction has 11858 states and 18241 transitions. [2023-11-19 08:02:02,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 9.210526315789474) internal successors, (175), 20 states have internal predecessors, (175), 6 states have call successors, (122), 4 states have call predecessors, (122), 5 states have return successors, (122), 4 states have call predecessors, (122), 6 states have call successors, (122) [2023-11-19 08:02:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 11858 states and 18241 transitions. [2023-11-19 08:02:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2023-11-19 08:02:02,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:02,763 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:02,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:02,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:02:02,971 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:02,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2008366198, now seen corresponding path program 1 times [2023-11-19 08:02:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:02,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538543037] [2023-11-19 08:02:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:02,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:03,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:03,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882003712] [2023-11-19 08:02:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:03,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:03,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:03,128 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:03,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b09be-d955-4f70-804f-ea856c86fed1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:02:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:03,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:02:03,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3588 proven. 72 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2023-11-19 08:02:04,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-19 08:02:05,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:05,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538543037] [2023-11-19 08:02:05,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:05,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882003712] [2023-11-19 08:02:05,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882003712] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:05,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:02:05,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-11-19 08:02:05,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029319234] [2023-11-19 08:02:05,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:05,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:02:05,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:02:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:02:05,026 INFO L87 Difference]: Start difference. First operand 11858 states and 18241 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 2 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-19 08:02:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:08,579 INFO L93 Difference]: Finished difference Result 41358 states and 63530 transitions. [2023-11-19 08:02:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:02:08,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 2 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 394 [2023-11-19 08:02:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:08,692 INFO L225 Difference]: With dead ends: 41358 [2023-11-19 08:02:08,692 INFO L226 Difference]: Without dead ends: 29594 [2023-11-19 08:02:08,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:02:08,734 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1037 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:08,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 1011 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:02:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29594 states.