./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.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_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/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_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/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_12418609-031f-4b6a-bb5b-8e6f95bb16ae/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 d402cd14beee6851ca97c58b2a2589220820214ac9c394c1c5bdac6dbc1a1025 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:45:38,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:45:38,327 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:45:38,333 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:45:38,334 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:45:38,361 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:45:38,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:45:38,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:45:38,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:45:38,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:45:38,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:45:38,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:45:38,366 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:45:38,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:45:38,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:45:38,368 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:45:38,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:45:38,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:45:38,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:45:38,370 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:45:38,370 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:45:38,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:45:38,371 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:45:38,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:45:38,372 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:45:38,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:45:38,373 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:45:38,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:45:38,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:38,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:45:38,375 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:45:38,375 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:45:38,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:45:38,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:45:38,376 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:45:38,376 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:45:38,377 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:45:38,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:45:38,377 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:45:38,377 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_12418609-031f-4b6a-bb5b-8e6f95bb16ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d402cd14beee6851ca97c58b2a2589220820214ac9c394c1c5bdac6dbc1a1025 [2023-11-19 07:45:38,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:45:38,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:45:38,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:45:38,647 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:45:38,648 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:45:38,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i [2023-11-19 07:45:41,846 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:45:42,111 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:45:42,114 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i [2023-11-19 07:45:42,126 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/data/bf30985ee/8e6f8939c0d148e3bbd5951bec5440bf/FLAGb10ca0cbe [2023-11-19 07:45:42,139 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/data/bf30985ee/8e6f8939c0d148e3bbd5951bec5440bf [2023-11-19 07:45:42,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:45:42,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:45:42,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:42,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:45:42,154 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:45:42,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1623de66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42, skipping insertion in model container [2023-11-19 07:45:42,159 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,196 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:45:42,355 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_12418609-031f-4b6a-bb5b-8e6f95bb16ae/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i[919,932] [2023-11-19 07:45:42,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:42,492 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:45:42,520 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_12418609-031f-4b6a-bb5b-8e6f95bb16ae/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i[919,932] [2023-11-19 07:45:42,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:45:42,580 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:45:42,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42 WrapperNode [2023-11-19 07:45:42,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:45:42,583 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:42,584 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:45:42,584 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:45:42,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,606 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,669 INFO L138 Inliner]: procedures = 26, calls = 61, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 301 [2023-11-19 07:45:42,670 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:45:42,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:45:42,671 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:45:42,671 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:45:42,680 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,681 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,686 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,687 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,718 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,728 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,734 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,746 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:45:42,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:45:42,748 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:45:42,748 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:45:42,749 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (1/1) ... [2023-11-19 07:45:42,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:45:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:42,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:45:42,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:45:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:45:42,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:45:42,844 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:45:42,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:45:42,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:45:42,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:45:42,994 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:45:42,996 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:45:43,719 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:45:43,730 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:45:43,731 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:45:43,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:43 BoogieIcfgContainer [2023-11-19 07:45:43,736 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:45:43,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:45:43,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:45:43,743 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:45:43,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:45:42" (1/3) ... [2023-11-19 07:45:43,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9b7df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:43, skipping insertion in model container [2023-11-19 07:45:43,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:45:42" (2/3) ... [2023-11-19 07:45:43,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9b7df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:45:43, skipping insertion in model container [2023-11-19 07:45:43,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:45:43" (3/3) ... [2023-11-19 07:45:43,746 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i [2023-11-19 07:45:43,767 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:45:43,767 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:45:43,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:45:43,834 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;@3b01374e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:45:43,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:45:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 77 states have internal predecessors, (110), 48 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-19 07:45:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-19 07:45:43,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:43,889 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:43,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:43,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:43,895 INFO L85 PathProgramCache]: Analyzing trace with hash 553162582, now seen corresponding path program 1 times [2023-11-19 07:45:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116818327] [2023-11-19 07:45:43,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:43,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:44,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:44,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249724453] [2023-11-19 07:45:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:44,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:44,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:44,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:44,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:45:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:44,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:45:44,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1547 proven. 111 refuted. 0 times theorem prover too weak. 2854 trivial. 0 not checked. [2023-11-19 07:45:45,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 30 proven. 111 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-19 07:45:45,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:45,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116818327] [2023-11-19 07:45:45,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:45,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249724453] [2023-11-19 07:45:45,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249724453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:45,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:45:45,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-19 07:45:45,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984122829] [2023-11-19 07:45:45,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:45:45,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:45,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:45:45,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:45:45,835 INFO L87 Difference]: Start difference. First operand has 127 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 77 states have internal predecessors, (110), 48 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-19 07:45:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:46,668 INFO L93 Difference]: Finished difference Result 307 states and 560 transitions. [2023-11-19 07:45:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:45:46,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) Word has length 295 [2023-11-19 07:45:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:46,688 INFO L225 Difference]: With dead ends: 307 [2023-11-19 07:45:46,689 INFO L226 Difference]: Without dead ends: 183 [2023-11-19 07:45:46,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:45:46,700 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 175 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:46,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 496 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:45:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-19 07:45:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2023-11-19 07:45:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 114 states have (on average 1.4210526315789473) internal successors, (162), 115 states have internal predecessors, (162), 58 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-19 07:45:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 278 transitions. [2023-11-19 07:45:46,804 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 278 transitions. Word has length 295 [2023-11-19 07:45:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:46,807 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 278 transitions. [2023-11-19 07:45:46,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-19 07:45:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 278 transitions. [2023-11-19 07:45:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-19 07:45:46,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:46,817 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:46,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:45:47,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:47,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:47,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:47,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2114965318, now seen corresponding path program 1 times [2023-11-19 07:45:47,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:47,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295024273] [2023-11-19 07:45:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:47,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:47,213 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:47,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5225213] [2023-11-19 07:45:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:47,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:47,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:47,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:47,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:45:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:47,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:45:47,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1311 proven. 117 refuted. 0 times theorem prover too weak. 3084 trivial. 0 not checked. [2023-11-19 07:45:47,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-19 07:45:48,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:48,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295024273] [2023-11-19 07:45:48,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:48,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5225213] [2023-11-19 07:45:48,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5225213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:48,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:45:48,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 07:45:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088715162] [2023-11-19 07:45:48,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:45:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:45:48,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:45:48,367 INFO L87 Difference]: Start difference. First operand 176 states and 278 transitions. Second operand has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2023-11-19 07:45:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:49,478 INFO L93 Difference]: Finished difference Result 492 states and 768 transitions. [2023-11-19 07:45:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:45:49,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) Word has length 296 [2023-11-19 07:45:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:49,487 INFO L225 Difference]: With dead ends: 492 [2023-11-19 07:45:49,487 INFO L226 Difference]: Without dead ends: 319 [2023-11-19 07:45:49,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:45:49,491 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 388 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:49,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 866 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:45:49,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-19 07:45:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 275. [2023-11-19 07:45:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 159 states have (on average 1.2893081761006289) internal successors, (205), 161 states have internal predecessors, (205), 106 states have call successors, (106), 9 states have call predecessors, (106), 9 states have return successors, (106), 104 states have call predecessors, (106), 106 states have call successors, (106) [2023-11-19 07:45:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 417 transitions. [2023-11-19 07:45:49,579 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 417 transitions. Word has length 296 [2023-11-19 07:45:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:49,581 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 417 transitions. [2023-11-19 07:45:49,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.083333333333334) internal successors, (109), 12 states have internal predecessors, (109), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2023-11-19 07:45:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 417 transitions. [2023-11-19 07:45:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-11-19 07:45:49,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:49,589 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:49,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:45:49,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:49,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:49,805 INFO L85 PathProgramCache]: Analyzing trace with hash 586416498, now seen corresponding path program 1 times [2023-11-19 07:45:49,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:49,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172796439] [2023-11-19 07:45:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:49,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:49,922 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:49,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741514328] [2023-11-19 07:45:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:49,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:49,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:49,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:49,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:45:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:50,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:45:50,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-19 07:45:50,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:45:50,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:50,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172796439] [2023-11-19 07:45:50,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:50,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741514328] [2023-11-19 07:45:50,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741514328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:45:50,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:45:50,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:45:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066614470] [2023-11-19 07:45:50,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:45:50,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:45:50,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:50,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:45:50,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:50,200 INFO L87 Difference]: Start difference. First operand 275 states and 417 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-19 07:45:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:50,260 INFO L93 Difference]: Finished difference Result 524 states and 793 transitions. [2023-11-19 07:45:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:45:50,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 297 [2023-11-19 07:45:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:50,271 INFO L225 Difference]: With dead ends: 524 [2023-11-19 07:45:50,271 INFO L226 Difference]: Without dead ends: 343 [2023-11-19 07:45:50,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:45:50,276 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 42 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:50,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 394 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:45:50,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-19 07:45:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 339. [2023-11-19 07:45:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 213 states have (on average 1.3192488262910798) internal successors, (281), 217 states have internal predecessors, (281), 114 states have call successors, (114), 11 states have call predecessors, (114), 11 states have return successors, (114), 110 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-19 07:45:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 509 transitions. [2023-11-19 07:45:50,359 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 509 transitions. Word has length 297 [2023-11-19 07:45:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:50,362 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 509 transitions. [2023-11-19 07:45:50,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-19 07:45:50,363 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 509 transitions. [2023-11-19 07:45:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-11-19 07:45:50,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:50,369 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:50,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:50,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:50,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:50,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:50,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1933543436, now seen corresponding path program 1 times [2023-11-19 07:45:50,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:50,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970036460] [2023-11-19 07:45:50,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:50,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:50,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:50,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572486280] [2023-11-19 07:45:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:50,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:50,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:50,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:50,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:45:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:50,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:45:50,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1446 proven. 249 refuted. 0 times theorem prover too weak. 2817 trivial. 0 not checked. [2023-11-19 07:45:52,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-19 07:45:53,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:53,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970036460] [2023-11-19 07:45:53,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:53,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572486280] [2023-11-19 07:45:53,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572486280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:53,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:45:53,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2023-11-19 07:45:53,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530931336] [2023-11-19 07:45:53,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:53,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:45:53,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:53,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:45:53,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:45:53,718 INFO L87 Difference]: Start difference. First operand 339 states and 509 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 5 states have call successors, (96), 4 states have call predecessors, (96), 6 states have return successors, (96), 3 states have call predecessors, (96), 5 states have call successors, (96) [2023-11-19 07:45:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:45:56,355 INFO L93 Difference]: Finished difference Result 1182 states and 1786 transitions. [2023-11-19 07:45:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 07:45:56,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 5 states have call successors, (96), 4 states have call predecessors, (96), 6 states have return successors, (96), 3 states have call predecessors, (96), 5 states have call successors, (96) Word has length 297 [2023-11-19 07:45:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:45:56,362 INFO L225 Difference]: With dead ends: 1182 [2023-11-19 07:45:56,362 INFO L226 Difference]: Without dead ends: 937 [2023-11-19 07:45:56,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 579 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=592, Invalid=1858, Unknown=0, NotChecked=0, Total=2450 [2023-11-19 07:45:56,366 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 2113 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:45:56,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2161 Valid, 1123 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 07:45:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2023-11-19 07:45:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 469. [2023-11-19 07:45:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 336 states have (on average 1.4166666666666667) internal successors, (476), 340 states have internal predecessors, (476), 118 states have call successors, (118), 14 states have call predecessors, (118), 14 states have return successors, (118), 114 states have call predecessors, (118), 118 states have call successors, (118) [2023-11-19 07:45:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 712 transitions. [2023-11-19 07:45:56,453 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 712 transitions. Word has length 297 [2023-11-19 07:45:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:45:56,454 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 712 transitions. [2023-11-19 07:45:56,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 5 states have call successors, (96), 4 states have call predecessors, (96), 6 states have return successors, (96), 3 states have call predecessors, (96), 5 states have call successors, (96) [2023-11-19 07:45:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 712 transitions. [2023-11-19 07:45:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-11-19 07:45:56,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:45:56,460 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:45:56,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:45:56,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:56,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:45:56,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:45:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1467463049, now seen corresponding path program 1 times [2023-11-19 07:45:56,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:45:56,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12255071] [2023-11-19 07:45:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:56,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:45:56,749 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:45:56,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038571699] [2023-11-19 07:45:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:45:56,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:45:56,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:45:56,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:45:56,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:45:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:45:56,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:45:57,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:45:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 47 proven. 141 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-19 07:45:58,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:45:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-19 07:45:59,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:45:59,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12255071] [2023-11-19 07:45:59,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:45:59,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038571699] [2023-11-19 07:45:59,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038571699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:45:59,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:45:59,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-19 07:45:59,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281756801] [2023-11-19 07:45:59,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:45:59,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:45:59,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:45:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:45:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:45:59,127 INFO L87 Difference]: Start difference. First operand 469 states and 712 transitions. Second operand has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-19 07:46:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:01,783 INFO L93 Difference]: Finished difference Result 1368 states and 2045 transitions. [2023-11-19 07:46:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:46:01,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) Word has length 297 [2023-11-19 07:46:01,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:01,793 INFO L225 Difference]: With dead ends: 1368 [2023-11-19 07:46:01,793 INFO L226 Difference]: Without dead ends: 1117 [2023-11-19 07:46:01,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2023-11-19 07:46:01,796 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 1455 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:01,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1455 Valid, 844 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 07:46:01,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2023-11-19 07:46:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 745. [2023-11-19 07:46:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 496 states have (on average 1.3387096774193548) internal successors, (664), 502 states have internal predecessors, (664), 218 states have call successors, (218), 30 states have call predecessors, (218), 30 states have return successors, (218), 212 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-19 07:46:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1100 transitions. [2023-11-19 07:46:02,021 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1100 transitions. Word has length 297 [2023-11-19 07:46:02,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:02,022 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1100 transitions. [2023-11-19 07:46:02,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-19 07:46:02,022 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1100 transitions. [2023-11-19 07:46:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-11-19 07:46:02,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:02,029 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:02,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:02,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:02,240 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:02,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash 204417463, now seen corresponding path program 1 times [2023-11-19 07:46:02,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:02,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186885902] [2023-11-19 07:46:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:02,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:02,284 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:02,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743600581] [2023-11-19 07:46:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:02,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:02,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:02,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:02,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:46:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:02,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:46:02,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 47 proven. 141 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-19 07:46:03,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:46:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-19 07:46:04,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:04,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186885902] [2023-11-19 07:46:04,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:04,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743600581] [2023-11-19 07:46:04,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743600581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:46:04,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:46:04,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-19 07:46:04,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411733469] [2023-11-19 07:46:04,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:46:04,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:46:04,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:46:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:46:04,504 INFO L87 Difference]: Start difference. First operand 745 states and 1100 transitions. Second operand has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-19 07:46:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:07,305 INFO L93 Difference]: Finished difference Result 2467 states and 3610 transitions. [2023-11-19 07:46:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-19 07:46:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) Word has length 297 [2023-11-19 07:46:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:07,325 INFO L225 Difference]: With dead ends: 2467 [2023-11-19 07:46:07,325 INFO L226 Difference]: Without dead ends: 1853 [2023-11-19 07:46:07,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=466, Invalid=1094, Unknown=0, NotChecked=0, Total=1560 [2023-11-19 07:46:07,331 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 962 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:07,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 980 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 07:46:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2023-11-19 07:46:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1347. [2023-11-19 07:46:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 903 states have (on average 1.317829457364341) internal successors, (1190), 915 states have internal predecessors, (1190), 388 states have call successors, (388), 55 states have call predecessors, (388), 55 states have return successors, (388), 376 states have call predecessors, (388), 388 states have call successors, (388) [2023-11-19 07:46:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 1966 transitions. [2023-11-19 07:46:07,761 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 1966 transitions. Word has length 297 [2023-11-19 07:46:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:07,762 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 1966 transitions. [2023-11-19 07:46:07,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-19 07:46:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 1966 transitions. [2023-11-19 07:46:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-11-19 07:46:07,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:07,767 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:07,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:07,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:07,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:07,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:07,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1484526279, now seen corresponding path program 1 times [2023-11-19 07:46:07,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:07,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565345316] [2023-11-19 07:46:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:07,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:08,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:08,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223094687] [2023-11-19 07:46:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:08,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:08,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:08,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:08,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:46:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:08,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:46:08,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-19 07:46:09,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:09,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:09,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565345316] [2023-11-19 07:46:09,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:09,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223094687] [2023-11-19 07:46:09,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223094687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:09,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:09,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:46:09,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965945244] [2023-11-19 07:46:09,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:09,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:46:09,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:09,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:46:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:46:09,417 INFO L87 Difference]: Start difference. First operand 1347 states and 1966 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-19 07:46:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:10,299 INFO L93 Difference]: Finished difference Result 2733 states and 4020 transitions. [2023-11-19 07:46:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:46:10,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 297 [2023-11-19 07:46:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:10,314 INFO L225 Difference]: With dead ends: 2733 [2023-11-19 07:46:10,315 INFO L226 Difference]: Without dead ends: 1807 [2023-11-19 07:46:10,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:46:10,320 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 307 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:10,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 776 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:46:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-11-19 07:46:10,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1357. [2023-11-19 07:46:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 913 states have (on average 1.3176341730558598) internal successors, (1203), 925 states have internal predecessors, (1203), 388 states have call successors, (388), 55 states have call predecessors, (388), 55 states have return successors, (388), 376 states have call predecessors, (388), 388 states have call successors, (388) [2023-11-19 07:46:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 1979 transitions. [2023-11-19 07:46:10,651 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 1979 transitions. Word has length 297 [2023-11-19 07:46:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:10,652 INFO L495 AbstractCegarLoop]: Abstraction has 1357 states and 1979 transitions. [2023-11-19 07:46:10,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-19 07:46:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 1979 transitions. [2023-11-19 07:46:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-11-19 07:46:10,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:10,656 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:10,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:10,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:10,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:10,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:10,866 INFO L85 PathProgramCache]: Analyzing trace with hash -666877829, now seen corresponding path program 1 times [2023-11-19 07:46:10,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:10,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703928390] [2023-11-19 07:46:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:10,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:10,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205770205] [2023-11-19 07:46:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:10,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:10,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:10,926 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:10,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12418609-031f-4b6a-bb5b-8e6f95bb16ae/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:46:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:11,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-19 07:46:11,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1531 proven. 906 refuted. 0 times theorem prover too weak. 2075 trivial. 0 not checked. [2023-11-19 07:46:28,616 INFO L327 TraceCheckSpWp]: Computing backward predicates...