./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 e3e490624669738192d84194857eb5010bb4c249ca7cd2d385528db4c6ad1bc5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:25,380 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:25,445 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:53:25,451 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:25,451 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:25,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:25,477 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:25,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:25,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:25,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:25,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:25,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:25,482 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:25,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:25,483 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:53:25,484 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:25,484 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:25,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:25,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:25,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:53:25,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:25,487 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:53:25,488 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:25,488 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:53:25,489 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:25,490 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:25,490 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:25,491 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:25,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:25,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:25,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:25,493 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:53:25,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:25,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:25,494 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:25,495 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:53:25,495 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:25,496 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:25,496 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:25,496 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_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3e490624669738192d84194857eb5010bb4c249ca7cd2d385528db4c6ad1bc5 [2023-11-06 21:53:25,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:25,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:25,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:25,823 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:25,824 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:25,826 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i [2023-11-06 21:53:29,078 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:29,383 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:29,384 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i [2023-11-06 21:53:29,402 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/data/7b99cc5f8/4bbc58da0187458ea5ce52a3e4847c70/FLAG0773ab258 [2023-11-06 21:53:29,420 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/data/7b99cc5f8/4bbc58da0187458ea5ce52a3e4847c70 [2023-11-06 21:53:29,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:29,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:29,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:29,427 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:29,434 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:29,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:29" (1/1) ... [2023-11-06 21:53:29,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59322a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:29, skipping insertion in model container [2023-11-06 21:53:29,437 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:29" (1/1) ... [2023-11-06 21:53:29,500 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:29,658 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_c93228d4-9be1-4318-b526-8708bd79bd55/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i[916,929] [2023-11-06 21:53:29,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:30,029 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:30,042 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_c93228d4-9be1-4318-b526-8708bd79bd55/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i[916,929] [2023-11-06 21:53:30,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:30,301 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:30,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30 WrapperNode [2023-11-06 21:53:30,302 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:30,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:30,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:30,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:30,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,358 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,489 INFO L138 Inliner]: procedures = 26, calls = 141, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 989 [2023-11-06 21:53:30,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:30,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:30,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:30,492 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:30,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,522 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,523 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,599 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,633 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:30,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:30,634 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:30,634 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:30,635 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (1/1) ... [2023-11-06 21:53:30,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:30,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:30,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:30,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:53:30,715 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:53:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:30,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:30,875 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:30,878 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:32,169 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:32,181 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:32,181 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:53:32,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:32 BoogieIcfgContainer [2023-11-06 21:53:32,184 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:32,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:32,187 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:32,190 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:32,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:29" (1/3) ... [2023-11-06 21:53:32,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9ad2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:32, skipping insertion in model container [2023-11-06 21:53:32,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:30" (2/3) ... [2023-11-06 21:53:32,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9ad2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:32, skipping insertion in model container [2023-11-06 21:53:32,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:32" (3/3) ... [2023-11-06 21:53:32,194 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-28.i [2023-11-06 21:53:32,214 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:32,214 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:53:32,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:53:32,335 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=LoopsAndPotentialCycles, 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;@c4c04d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:53:32,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:53:32,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 391 states, 260 states have (on average 1.6115384615384616) internal successors, (419), 261 states have internal predecessors, (419), 128 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-06 21:53:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2023-11-06 21:53:32,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:32,423 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:32,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:32,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1247059676, now seen corresponding path program 1 times [2023-11-06 21:53:32,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:32,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964504216] [2023-11-06 21:53:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:32,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:33,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:33,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964504216] [2023-11-06 21:53:33,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:53:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572633489] [2023-11-06 21:53:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:33,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:33,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:33,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:33,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:53:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:33,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:53:33,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 32258 trivial. 0 not checked. [2023-11-06 21:53:34,011 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:34,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572633489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:34,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:34,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:53:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057403763] [2023-11-06 21:53:34,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:34,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:53:34,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:34,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:53:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:53:34,067 INFO L87 Difference]: Start difference. First operand has 391 states, 260 states have (on average 1.6115384615384616) internal successors, (419), 261 states have internal predecessors, (419), 128 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (128), 2 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-06 21:53:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:34,167 INFO L93 Difference]: Finished difference Result 761 states and 1445 transitions. [2023-11-06 21:53:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:53:34,174 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (128), 2 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 2 states have call successors, (128) Word has length 804 [2023-11-06 21:53:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:34,198 INFO L225 Difference]: With dead ends: 761 [2023-11-06 21:53:34,198 INFO L226 Difference]: Without dead ends: 373 [2023-11-06 21:53:34,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:53:34,217 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:34,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:34,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-06 21:53:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2023-11-06 21:53:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 243 states have (on average 1.5679012345679013) internal successors, (381), 243 states have internal predecessors, (381), 128 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-06 21:53:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 637 transitions. [2023-11-06 21:53:34,394 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 637 transitions. Word has length 804 [2023-11-06 21:53:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:34,397 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 637 transitions. [2023-11-06 21:53:34,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (128), 2 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-06 21:53:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 637 transitions. [2023-11-06 21:53:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-06 21:53:34,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:34,440 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:34,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:34,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 21:53:34,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:34,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash -649592639, now seen corresponding path program 1 times [2023-11-06 21:53:34,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:34,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636060519] [2023-11-06 21:53:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:34,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:34,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:34,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634611456] [2023-11-06 21:53:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:34,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:34,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:34,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:34,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:53:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:35,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:35,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:53:35,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:35,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:35,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636060519] [2023-11-06 21:53:35,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:35,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634611456] [2023-11-06 21:53:35,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634611456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:35,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:35,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:35,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861538237] [2023-11-06 21:53:35,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:35,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:35,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:35,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:35,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:35,643 INFO L87 Difference]: Start difference. First operand 373 states and 637 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:35,750 INFO L93 Difference]: Finished difference Result 744 states and 1273 transitions. [2023-11-06 21:53:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:35,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-06 21:53:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:35,769 INFO L225 Difference]: With dead ends: 744 [2023-11-06 21:53:35,770 INFO L226 Difference]: Without dead ends: 374 [2023-11-06 21:53:35,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:35,773 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 0 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:35,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1266 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:35,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-06 21:53:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2023-11-06 21:53:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 244 states have (on average 1.5655737704918034) internal successors, (382), 244 states have internal predecessors, (382), 128 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-06 21:53:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 638 transitions. [2023-11-06 21:53:35,857 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 638 transitions. Word has length 805 [2023-11-06 21:53:35,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:35,863 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 638 transitions. [2023-11-06 21:53:35,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 638 transitions. [2023-11-06 21:53:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-06 21:53:35,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:35,881 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:35,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:36,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:36,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:36,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1546985917, now seen corresponding path program 1 times [2023-11-06 21:53:36,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:36,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876081242] [2023-11-06 21:53:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:36,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:36,257 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:36,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849231287] [2023-11-06 21:53:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:36,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:36,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:36,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:36,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:53:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:36,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:36,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:53:37,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:37,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:37,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876081242] [2023-11-06 21:53:37,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:37,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849231287] [2023-11-06 21:53:37,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849231287] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:37,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:37,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:37,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741402491] [2023-11-06 21:53:37,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:37,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:37,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:37,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:37,062 INFO L87 Difference]: Start difference. First operand 374 states and 638 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:37,151 INFO L93 Difference]: Finished difference Result 1116 states and 1908 transitions. [2023-11-06 21:53:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-06 21:53:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:37,161 INFO L225 Difference]: With dead ends: 1116 [2023-11-06 21:53:37,161 INFO L226 Difference]: Without dead ends: 745 [2023-11-06 21:53:37,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:37,165 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 588 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:37,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1258 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-11-06 21:53:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2023-11-06 21:53:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 484 states have (on average 1.5661157024793388) internal successors, (758), 484 states have internal predecessors, (758), 256 states have call successors, (256), 2 states have call predecessors, (256), 2 states have return successors, (256), 256 states have call predecessors, (256), 256 states have call successors, (256) [2023-11-06 21:53:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1270 transitions. [2023-11-06 21:53:37,318 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1270 transitions. Word has length 805 [2023-11-06 21:53:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:37,321 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1270 transitions. [2023-11-06 21:53:37,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1270 transitions. [2023-11-06 21:53:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-06 21:53:37,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:37,332 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:37,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:37,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:37,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:37,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:37,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2056459007, now seen corresponding path program 1 times [2023-11-06 21:53:37,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:37,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406618108] [2023-11-06 21:53:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:37,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:37,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:37,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409674424] [2023-11-06 21:53:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:37,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:37,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:37,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:37,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:53:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:38,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:38,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:53:38,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:38,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:38,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406618108] [2023-11-06 21:53:38,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:38,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409674424] [2023-11-06 21:53:38,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409674424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:38,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:38,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284072686] [2023-11-06 21:53:38,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:38,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:38,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:38,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:38,438 INFO L87 Difference]: Start difference. First operand 743 states and 1270 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:38,568 INFO L93 Difference]: Finished difference Result 1983 states and 3388 transitions. [2023-11-06 21:53:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:38,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-06 21:53:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:38,583 INFO L225 Difference]: With dead ends: 1983 [2023-11-06 21:53:38,583 INFO L226 Difference]: Without dead ends: 1243 [2023-11-06 21:53:38,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:38,589 INFO L413 NwaCegarLoop]: 842 mSDtfsCounter, 383 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:38,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 1464 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2023-11-06 21:53:38,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1239. [2023-11-06 21:53:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 818 states have (on average 1.5672371638141809) internal successors, (1282), 820 states have internal predecessors, (1282), 416 states have call successors, (416), 4 states have call predecessors, (416), 4 states have return successors, (416), 414 states have call predecessors, (416), 416 states have call successors, (416) [2023-11-06 21:53:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 2114 transitions. [2023-11-06 21:53:38,794 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 2114 transitions. Word has length 805 [2023-11-06 21:53:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:38,796 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 2114 transitions. [2023-11-06 21:53:38,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 2114 transitions. [2023-11-06 21:53:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-06 21:53:38,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:38,808 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:38,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:39,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:39,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:39,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:39,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2104494783, now seen corresponding path program 1 times [2023-11-06 21:53:39,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:39,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678250546] [2023-11-06 21:53:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:39,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:39,176 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:39,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687756230] [2023-11-06 21:53:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:39,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:39,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:39,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:39,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:53:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:39,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 1888 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:39,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:53:39,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:39,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:39,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678250546] [2023-11-06 21:53:39,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:39,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687756230] [2023-11-06 21:53:39,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687756230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:39,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:39,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:39,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683172938] [2023-11-06 21:53:39,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:39,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:39,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:39,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:39,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:39,923 INFO L87 Difference]: Start difference. First operand 1239 states and 2114 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:40,092 INFO L93 Difference]: Finished difference Result 3291 states and 5632 transitions. [2023-11-06 21:53:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:40,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-06 21:53:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:40,115 INFO L225 Difference]: With dead ends: 3291 [2023-11-06 21:53:40,116 INFO L226 Difference]: Without dead ends: 2055 [2023-11-06 21:53:40,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:40,126 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 381 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:40,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1328 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2023-11-06 21:53:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 2049. [2023-11-06 21:53:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 1460 states have (on average 1.6054794520547946) internal successors, (2344), 1466 states have internal predecessors, (2344), 580 states have call successors, (580), 8 states have call predecessors, (580), 8 states have return successors, (580), 574 states have call predecessors, (580), 580 states have call successors, (580) [2023-11-06 21:53:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 3504 transitions. [2023-11-06 21:53:40,505 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 3504 transitions. Word has length 805 [2023-11-06 21:53:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:40,508 INFO L495 AbstractCegarLoop]: Abstraction has 2049 states and 3504 transitions. [2023-11-06 21:53:40,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 3504 transitions. [2023-11-06 21:53:40,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-06 21:53:40,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:40,523 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:40,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:40,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:40,737 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:40,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash -49486533, now seen corresponding path program 1 times [2023-11-06 21:53:40,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:40,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184767576] [2023-11-06 21:53:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:40,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:40,909 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257264735] [2023-11-06 21:53:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:40,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:40,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:40,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:40,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:53:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:41,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:41,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:53:41,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:41,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:41,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184767576] [2023-11-06 21:53:41,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:41,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257264735] [2023-11-06 21:53:41,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257264735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:41,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:41,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:41,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949112414] [2023-11-06 21:53:41,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:41,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:41,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:41,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:41,710 INFO L87 Difference]: Start difference. First operand 2049 states and 3504 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:42,031 INFO L93 Difference]: Finished difference Result 5595 states and 9524 transitions. [2023-11-06 21:53:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-06 21:53:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:42,067 INFO L225 Difference]: With dead ends: 5595 [2023-11-06 21:53:42,067 INFO L226 Difference]: Without dead ends: 3549 [2023-11-06 21:53:42,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:42,081 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 349 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:42,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1253 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2023-11-06 21:53:42,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3545. [2023-11-06 21:53:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 2452 states have (on average 1.567699836867863) internal successors, (3844), 2466 states have internal predecessors, (3844), 1076 states have call successors, (1076), 16 states have call predecessors, (1076), 16 states have return successors, (1076), 1062 states have call predecessors, (1076), 1076 states have call successors, (1076) [2023-11-06 21:53:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 5996 transitions. [2023-11-06 21:53:42,711 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 5996 transitions. Word has length 805 [2023-11-06 21:53:42,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:42,713 INFO L495 AbstractCegarLoop]: Abstraction has 3545 states and 5996 transitions. [2023-11-06 21:53:42,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 5996 transitions. [2023-11-06 21:53:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-06 21:53:42,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:42,729 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:42,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:42,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:53:42,945 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:42,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:42,946 INFO L85 PathProgramCache]: Analyzing trace with hash 373215293, now seen corresponding path program 1 times [2023-11-06 21:53:42,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:42,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967694257] [2023-11-06 21:53:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:42,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:43,064 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:43,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944253347] [2023-11-06 21:53:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:43,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:43,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:43,066 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:43,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:53:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:43,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:43,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:53:43,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:43,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:43,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967694257] [2023-11-06 21:53:43,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:43,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944253347] [2023-11-06 21:53:43,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944253347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:43,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:43,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:43,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905021632] [2023-11-06 21:53:43,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:43,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:43,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:43,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:43,869 INFO L87 Difference]: Start difference. First operand 3545 states and 5996 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:44,358 INFO L93 Difference]: Finished difference Result 10621 states and 17966 transitions. [2023-11-06 21:53:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:44,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-06 21:53:44,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:44,428 INFO L225 Difference]: With dead ends: 10621 [2023-11-06 21:53:44,428 INFO L226 Difference]: Without dead ends: 7079 [2023-11-06 21:53:44,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:44,447 INFO L413 NwaCegarLoop]: 1203 mSDtfsCounter, 612 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:44,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1830 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2023-11-06 21:53:45,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 4489. [2023-11-06 21:53:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 3396 states have (on average 1.6407538280329799) internal successors, (5572), 3410 states have internal predecessors, (5572), 1076 states have call successors, (1076), 16 states have call predecessors, (1076), 16 states have return successors, (1076), 1062 states have call predecessors, (1076), 1076 states have call successors, (1076) [2023-11-06 21:53:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 7724 transitions. [2023-11-06 21:53:45,792 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 7724 transitions. Word has length 805 [2023-11-06 21:53:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:45,794 INFO L495 AbstractCegarLoop]: Abstraction has 4489 states and 7724 transitions. [2023-11-06 21:53:45,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 7724 transitions. [2023-11-06 21:53:45,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-06 21:53:45,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:45,822 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:45,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:46,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:46,034 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:46,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1634132543, now seen corresponding path program 1 times [2023-11-06 21:53:46,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:46,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694137842] [2023-11-06 21:53:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:46,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:46,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:46,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116452176] [2023-11-06 21:53:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:46,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:46,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:46,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:46,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:53:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:46,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:53:47,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:53:50,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:50,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:50,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694137842] [2023-11-06 21:53:50,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:50,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116452176] [2023-11-06 21:53:50,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116452176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:50,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:50,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:50,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115809989] [2023-11-06 21:53:50,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:50,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:50,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:50,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:50,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:50,051 INFO L87 Difference]: Start difference. First operand 4489 states and 7724 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:51,292 INFO L93 Difference]: Finished difference Result 14473 states and 24745 transitions. [2023-11-06 21:53:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:51,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-06 21:53:51,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:51,393 INFO L225 Difference]: With dead ends: 14473 [2023-11-06 21:53:51,394 INFO L226 Difference]: Without dead ends: 9987 [2023-11-06 21:53:51,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 802 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:51,416 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1157 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:51,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 1683 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:53:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2023-11-06 21:53:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 8149. [2023-11-06 21:53:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 5964 states have (on average 1.6089872568745809) internal successors, (9596), 5992 states have internal predecessors, (9596), 2152 states have call successors, (2152), 32 states have call predecessors, (2152), 32 states have return successors, (2152), 2124 states have call predecessors, (2152), 2152 states have call successors, (2152) [2023-11-06 21:53:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 13900 transitions. [2023-11-06 21:53:53,077 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 13900 transitions. Word has length 805 [2023-11-06 21:53:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:53,079 INFO L495 AbstractCegarLoop]: Abstraction has 8149 states and 13900 transitions. [2023-11-06 21:53:53,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 13900 transitions. [2023-11-06 21:53:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-06 21:53:53,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:53,101 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:53,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:53,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:53,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:53,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1674807293, now seen corresponding path program 1 times [2023-11-06 21:53:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:53,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935265487] [2023-11-06 21:53:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:53,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:53,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698178906] [2023-11-06 21:53:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:53,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:53,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:53,451 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:53,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:53:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:54,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 1883 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:53:54,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:53:54,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:54,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:54,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935265487] [2023-11-06 21:53:54,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:54,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698178906] [2023-11-06 21:53:54,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698178906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:54,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:54,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:53:54,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085483495] [2023-11-06 21:53:54,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:54,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:54,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:54,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:54,401 INFO L87 Difference]: Start difference. First operand 8149 states and 13900 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:56,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:56,379 INFO L93 Difference]: Finished difference Result 23337 states and 39694 transitions. [2023-11-06 21:53:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:56,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-06 21:53:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:56,450 INFO L225 Difference]: With dead ends: 23337 [2023-11-06 21:53:56,451 INFO L226 Difference]: Without dead ends: 15191 [2023-11-06 21:53:56,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:53:56,488 INFO L413 NwaCegarLoop]: 901 mSDtfsCounter, 726 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:56,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 1548 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:53:56,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15191 states. [2023-11-06 21:53:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15191 to 11053. [2023-11-06 21:53:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11053 states, 8864 states have (on average 1.6768953068592058) internal successors, (14864), 8892 states have internal predecessors, (14864), 2152 states have call successors, (2152), 36 states have call predecessors, (2152), 36 states have return successors, (2152), 2124 states have call predecessors, (2152), 2152 states have call successors, (2152) [2023-11-06 21:53:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11053 states to 11053 states and 19168 transitions. [2023-11-06 21:53:58,250 INFO L78 Accepts]: Start accepts. Automaton has 11053 states and 19168 transitions. Word has length 805 [2023-11-06 21:53:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:58,252 INFO L495 AbstractCegarLoop]: Abstraction has 11053 states and 19168 transitions. [2023-11-06 21:53:58,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:53:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 11053 states and 19168 transitions. [2023-11-06 21:53:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-06 21:53:58,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:58,356 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:58,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:58,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 21:53:58,567 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:58,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2118707967, now seen corresponding path program 1 times [2023-11-06 21:53:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:58,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285896600] [2023-11-06 21:53:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:58,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:58,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069202364] [2023-11-06 21:53:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:58,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:58,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:58,731 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:58,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:53:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:59,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:53:59,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 15963 proven. 159 refuted. 0 times theorem prover too weak. 16390 trivial. 0 not checked. [2023-11-06 21:54:00,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 222 proven. 159 refuted. 0 times theorem prover too weak. 32131 trivial. 0 not checked. [2023-11-06 21:54:01,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:01,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285896600] [2023-11-06 21:54:01,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:01,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069202364] [2023-11-06 21:54:01,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069202364] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:01,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:01,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:54:01,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922474857] [2023-11-06 21:54:01,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:01,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:01,301 INFO L87 Difference]: Start difference. First operand 11053 states and 19168 transitions. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 2 states have call predecessors, (182), 2 states have call successors, (182) [2023-11-06 21:54:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:03,352 INFO L93 Difference]: Finished difference Result 22239 states and 38453 transitions. [2023-11-06 21:54:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:54:03,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 2 states have call predecessors, (182), 2 states have call successors, (182) Word has length 805 [2023-11-06 21:54:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:03,398 INFO L225 Difference]: With dead ends: 22239 [2023-11-06 21:54:03,398 INFO L226 Difference]: Without dead ends: 11189 [2023-11-06 21:54:03,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1612 GetRequests, 1602 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:03,431 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 385 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:03,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1217 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 21:54:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11189 states. [2023-11-06 21:54:04,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11189 to 11117. [2023-11-06 21:54:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11117 states, 8912 states have (on average 1.6624775583482945) internal successors, (14816), 8940 states have internal predecessors, (14816), 2152 states have call successors, (2152), 52 states have call predecessors, (2152), 52 states have return successors, (2152), 2124 states have call predecessors, (2152), 2152 states have call successors, (2152) [2023-11-06 21:54:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11117 states to 11117 states and 19120 transitions. [2023-11-06 21:54:04,890 INFO L78 Accepts]: Start accepts. Automaton has 11117 states and 19120 transitions. Word has length 805 [2023-11-06 21:54:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:04,893 INFO L495 AbstractCegarLoop]: Abstraction has 11117 states and 19120 transitions. [2023-11-06 21:54:04,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 2 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 2 states have call predecessors, (182), 2 states have call successors, (182) [2023-11-06 21:54:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 11117 states and 19120 transitions. [2023-11-06 21:54:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2023-11-06 21:54:04,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:04,920 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:04,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:05,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:05,132 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:05,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:05,133 INFO L85 PathProgramCache]: Analyzing trace with hash 947940177, now seen corresponding path program 1 times [2023-11-06 21:54:05,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:05,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061917834] [2023-11-06 21:54:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:05,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:05,269 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:05,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599699950] [2023-11-06 21:54:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:05,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:05,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:05,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:54:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:06,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:06,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 15571 proven. 147 refuted. 0 times theorem prover too weak. 16794 trivial. 0 not checked. [2023-11-06 21:54:06,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 234 proven. 147 refuted. 0 times theorem prover too weak. 32131 trivial. 0 not checked. [2023-11-06 21:54:07,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:07,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061917834] [2023-11-06 21:54:07,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:07,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599699950] [2023-11-06 21:54:07,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599699950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:07,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:07,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:54:07,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792509077] [2023-11-06 21:54:07,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:07,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:07,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:07,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:07,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:07,543 INFO L87 Difference]: Start difference. First operand 11117 states and 19120 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (177), 2 states have call predecessors, (177), 4 states have return successors, (178), 2 states have call predecessors, (178), 2 states have call successors, (178) [2023-11-06 21:54:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:10,361 INFO L93 Difference]: Finished difference Result 22389 states and 38343 transitions. [2023-11-06 21:54:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:54:10,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (177), 2 states have call predecessors, (177), 4 states have return successors, (178), 2 states have call predecessors, (178), 2 states have call successors, (178) Word has length 806 [2023-11-06 21:54:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:10,409 INFO L225 Difference]: With dead ends: 22389 [2023-11-06 21:54:10,409 INFO L226 Difference]: Without dead ends: 11275 [2023-11-06 21:54:10,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1614 GetRequests, 1604 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:10,433 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 726 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:10,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 1552 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 21:54:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2023-11-06 21:54:12,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11198. [2023-11-06 21:54:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11198 states, 8897 states have (on average 1.6393166235809824) internal successors, (14585), 8926 states have internal predecessors, (14585), 2230 states have call successors, (2230), 70 states have call predecessors, (2230), 70 states have return successors, (2230), 2201 states have call predecessors, (2230), 2230 states have call successors, (2230) [2023-11-06 21:54:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11198 states to 11198 states and 19045 transitions. [2023-11-06 21:54:12,273 INFO L78 Accepts]: Start accepts. Automaton has 11198 states and 19045 transitions. Word has length 806 [2023-11-06 21:54:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:12,275 INFO L495 AbstractCegarLoop]: Abstraction has 11198 states and 19045 transitions. [2023-11-06 21:54:12,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (177), 2 states have call predecessors, (177), 4 states have return successors, (178), 2 states have call predecessors, (178), 2 states have call successors, (178) [2023-11-06 21:54:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 11198 states and 19045 transitions. [2023-11-06 21:54:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2023-11-06 21:54:12,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:12,308 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:12,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:12,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:12,531 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:12,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:12,533 INFO L85 PathProgramCache]: Analyzing trace with hash -982134956, now seen corresponding path program 1 times [2023-11-06 21:54:12,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:12,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455604221] [2023-11-06 21:54:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:12,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:12,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:12,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039096364] [2023-11-06 21:54:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:12,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:12,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:12,704 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:12,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:54:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:13,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 1883 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:13,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 15327 proven. 141 refuted. 0 times theorem prover too weak. 17044 trivial. 0 not checked. [2023-11-06 21:54:14,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 240 proven. 141 refuted. 0 times theorem prover too weak. 32131 trivial. 0 not checked. [2023-11-06 21:54:15,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:15,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455604221] [2023-11-06 21:54:15,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:15,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039096364] [2023-11-06 21:54:15,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039096364] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:15,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:15,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:54:15,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366856564] [2023-11-06 21:54:15,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:15,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:15,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:15,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:15,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:15,288 INFO L87 Difference]: Start difference. First operand 11198 states and 19045 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 2 states have call successors, (175), 2 states have call predecessors, (175), 4 states have return successors, (176), 2 states have call predecessors, (176), 2 states have call successors, (176) [2023-11-06 21:54:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:16,938 INFO L93 Difference]: Finished difference Result 17160 states and 29186 transitions. [2023-11-06 21:54:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:54:16,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 2 states have call successors, (175), 2 states have call predecessors, (175), 4 states have return successors, (176), 2 states have call predecessors, (176), 2 states have call successors, (176) Word has length 807 [2023-11-06 21:54:16,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:16,966 INFO L225 Difference]: With dead ends: 17160 [2023-11-06 21:54:16,967 INFO L226 Difference]: Without dead ends: 6094 [2023-11-06 21:54:16,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1616 GetRequests, 1606 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:16,990 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 654 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:16,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1218 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:54:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6094 states. [2023-11-06 21:54:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6094 to 6050. [2023-11-06 21:54:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6050 states, 4741 states have (on average 1.6226534486395274) internal successors, (7693), 4754 states have internal predecessors, (7693), 1262 states have call successors, (1262), 46 states have call predecessors, (1262), 46 states have return successors, (1262), 1249 states have call predecessors, (1262), 1262 states have call successors, (1262) [2023-11-06 21:54:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6050 states to 6050 states and 10217 transitions. [2023-11-06 21:54:17,985 INFO L78 Accepts]: Start accepts. Automaton has 6050 states and 10217 transitions. Word has length 807 [2023-11-06 21:54:17,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:17,987 INFO L495 AbstractCegarLoop]: Abstraction has 6050 states and 10217 transitions. [2023-11-06 21:54:17,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 2 states have call successors, (175), 2 states have call predecessors, (175), 4 states have return successors, (176), 2 states have call predecessors, (176), 2 states have call successors, (176) [2023-11-06 21:54:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6050 states and 10217 transitions. [2023-11-06 21:54:18,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2023-11-06 21:54:18,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:18,005 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:18,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:18,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:54:18,217 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:18,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash 13225550, now seen corresponding path program 1 times [2023-11-06 21:54:18,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:18,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538457759] [2023-11-06 21:54:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:18,340 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:18,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014495071] [2023-11-06 21:54:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:18,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:18,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:18,343 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:18,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:54:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:19,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 1881 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:19,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 14403 proven. 123 refuted. 0 times theorem prover too weak. 17986 trivial. 0 not checked. [2023-11-06 21:54:19,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 258 proven. 123 refuted. 0 times theorem prover too weak. 32131 trivial. 0 not checked. [2023-11-06 21:54:20,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:20,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538457759] [2023-11-06 21:54:20,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:20,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014495071] [2023-11-06 21:54:20,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014495071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:20,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:20,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:54:20,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773136338] [2023-11-06 21:54:20,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:20,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:20,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:20,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:20,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:20,660 INFO L87 Difference]: Start difference. First operand 6050 states and 10217 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 2 states have call successors, (169), 2 states have call predecessors, (169), 4 states have return successors, (170), 2 states have call predecessors, (170), 2 states have call successors, (170) [2023-11-06 21:54:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:22,646 INFO L93 Difference]: Finished difference Result 9570 states and 16201 transitions. [2023-11-06 21:54:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:54:22,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 2 states have call successors, (169), 2 states have call predecessors, (169), 4 states have return successors, (170), 2 states have call predecessors, (170), 2 states have call successors, (170) Word has length 807 [2023-11-06 21:54:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:22,662 INFO L225 Difference]: With dead ends: 9570 [2023-11-06 21:54:22,663 INFO L226 Difference]: Without dead ends: 3652 [2023-11-06 21:54:22,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1616 GetRequests, 1606 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:22,678 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 984 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:22,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1070 Valid, 1449 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 21:54:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3652 states. [2023-11-06 21:54:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3652 to 2871. [2023-11-06 21:54:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2075 states have (on average 1.56) internal successors, (3237), 2080 states have internal predecessors, (3237), 762 states have call successors, (762), 33 states have call predecessors, (762), 33 states have return successors, (762), 757 states have call predecessors, (762), 762 states have call successors, (762) [2023-11-06 21:54:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 4761 transitions. [2023-11-06 21:54:23,308 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 4761 transitions. Word has length 807 [2023-11-06 21:54:23,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:23,309 INFO L495 AbstractCegarLoop]: Abstraction has 2871 states and 4761 transitions. [2023-11-06 21:54:23,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 2 states have call successors, (169), 2 states have call predecessors, (169), 4 states have return successors, (170), 2 states have call predecessors, (170), 2 states have call successors, (170) [2023-11-06 21:54:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 4761 transitions. [2023-11-06 21:54:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:54:23,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:23,323 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:23,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:23,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:23,536 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:23,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:23,537 INFO L85 PathProgramCache]: Analyzing trace with hash 254375197, now seen corresponding path program 1 times [2023-11-06 21:54:23,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:23,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909028331] [2023-11-06 21:54:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:23,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:23,672 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:23,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425363895] [2023-11-06 21:54:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:23,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:23,675 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:23,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:54:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:24,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:54:24,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:54:24,730 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:24,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:24,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909028331] [2023-11-06 21:54:24,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:24,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425363895] [2023-11-06 21:54:24,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425363895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:24,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:24,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:54:24,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018808898] [2023-11-06 21:54:24,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:24,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:54:24,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:24,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:54:24,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:54:24,737 INFO L87 Difference]: Start difference. First operand 2871 states and 4761 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:54:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:26,742 INFO L93 Difference]: Finished difference Result 6697 states and 11097 transitions. [2023-11-06 21:54:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:54:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 809 [2023-11-06 21:54:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:26,761 INFO L225 Difference]: With dead ends: 6697 [2023-11-06 21:54:26,762 INFO L226 Difference]: Without dead ends: 3763 [2023-11-06 21:54:26,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 808 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:54:26,770 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 1485 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 1055 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1055 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:26,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 1144 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1055 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 21:54:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2023-11-06 21:54:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 2827. [2023-11-06 21:54:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2031 states have (on average 1.5376661742983753) internal successors, (3123), 2036 states have internal predecessors, (3123), 762 states have call successors, (762), 33 states have call predecessors, (762), 33 states have return successors, (762), 757 states have call predecessors, (762), 762 states have call successors, (762) [2023-11-06 21:54:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 4647 transitions. [2023-11-06 21:54:27,443 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 4647 transitions. Word has length 809 [2023-11-06 21:54:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:27,445 INFO L495 AbstractCegarLoop]: Abstraction has 2827 states and 4647 transitions. [2023-11-06 21:54:27,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:54:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 4647 transitions. [2023-11-06 21:54:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:54:27,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:27,458 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:27,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:27,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:27,688 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:27,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 295049947, now seen corresponding path program 1 times [2023-11-06 21:54:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:27,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536935151] [2023-11-06 21:54:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:27,849 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:27,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855561986] [2023-11-06 21:54:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:27,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:27,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:27,852 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:27,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:54:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:28,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:54:28,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 14977 proven. 246 refuted. 0 times theorem prover too weak. 17289 trivial. 0 not checked. [2023-11-06 21:54:29,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 135 proven. 246 refuted. 0 times theorem prover too weak. 32131 trivial. 0 not checked. [2023-11-06 21:54:30,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:30,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536935151] [2023-11-06 21:54:30,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:30,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855561986] [2023-11-06 21:54:30,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855561986] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:30,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:30,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 21:54:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437997974] [2023-11-06 21:54:30,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:30,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:54:30,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:30,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:54:30,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:54:30,325 INFO L87 Difference]: Start difference. First operand 2827 states and 4647 transitions. Second operand has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 3 states have call successors, (210), 2 states have call predecessors, (210), 4 states have return successors, (211), 3 states have call predecessors, (211), 3 states have call successors, (211) [2023-11-06 21:54:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:31,627 INFO L93 Difference]: Finished difference Result 5553 states and 9115 transitions. [2023-11-06 21:54:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:54:31,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 3 states have call successors, (210), 2 states have call predecessors, (210), 4 states have return successors, (211), 3 states have call predecessors, (211), 3 states have call successors, (211) Word has length 809 [2023-11-06 21:54:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:31,639 INFO L225 Difference]: With dead ends: 5553 [2023-11-06 21:54:31,640 INFO L226 Difference]: Without dead ends: 2883 [2023-11-06 21:54:31,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1621 GetRequests, 1608 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:54:31,648 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 363 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:31,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 2122 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 21:54:31,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2023-11-06 21:54:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2855. [2023-11-06 21:54:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2054 states have (on average 1.5316455696202531) internal successors, (3146), 2059 states have internal predecessors, (3146), 762 states have call successors, (762), 38 states have call predecessors, (762), 38 states have return successors, (762), 757 states have call predecessors, (762), 762 states have call successors, (762) [2023-11-06 21:54:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4670 transitions. [2023-11-06 21:54:32,348 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4670 transitions. Word has length 809 [2023-11-06 21:54:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:32,349 INFO L495 AbstractCegarLoop]: Abstraction has 2855 states and 4670 transitions. [2023-11-06 21:54:32,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 3 states have call successors, (210), 2 states have call predecessors, (210), 4 states have return successors, (211), 3 states have call predecessors, (211), 3 states have call successors, (211) [2023-11-06 21:54:32,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4670 transitions. [2023-11-06 21:54:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:54:32,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:32,363 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:32,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:32,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:54:32,575 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:32,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:32,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1663524839, now seen corresponding path program 1 times [2023-11-06 21:54:32,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:32,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918005177] [2023-11-06 21:54:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:32,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:32,707 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:32,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100219803] [2023-11-06 21:54:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:32,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:32,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:32,710 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:32,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:54:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:33,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:54:33,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:54:43,331 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:43,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:43,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918005177] [2023-11-06 21:54:43,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:43,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100219803] [2023-11-06 21:54:43,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100219803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:43,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:43,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 21:54:43,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428259903] [2023-11-06 21:54:43,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:43,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:54:43,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:43,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:54:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:43,337 INFO L87 Difference]: Start difference. First operand 2855 states and 4670 transitions. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:54:45,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:45,324 INFO L93 Difference]: Finished difference Result 8883 states and 14460 transitions. [2023-11-06 21:54:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:54:45,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 809 [2023-11-06 21:54:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:45,350 INFO L225 Difference]: With dead ends: 8883 [2023-11-06 21:54:45,351 INFO L226 Difference]: Without dead ends: 6189 [2023-11-06 21:54:45,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 799 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:54:45,361 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 905 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:45,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 2931 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:54:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6189 states. [2023-11-06 21:54:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6189 to 5675. [2023-11-06 21:54:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5675 states, 4158 states have (on average 1.5329485329485328) internal successors, (6374), 4167 states have internal predecessors, (6374), 1438 states have call successors, (1438), 78 states have call predecessors, (1438), 78 states have return successors, (1438), 1429 states have call predecessors, (1438), 1438 states have call successors, (1438) [2023-11-06 21:54:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5675 states to 5675 states and 9250 transitions. [2023-11-06 21:54:46,725 INFO L78 Accepts]: Start accepts. Automaton has 5675 states and 9250 transitions. Word has length 809 [2023-11-06 21:54:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:46,727 INFO L495 AbstractCegarLoop]: Abstraction has 5675 states and 9250 transitions. [2023-11-06 21:54:46,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:54:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 5675 states and 9250 transitions. [2023-11-06 21:54:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:54:46,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:46,741 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:46,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:46,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:54:46,954 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:46,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2056551849, now seen corresponding path program 1 times [2023-11-06 21:54:46,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:46,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902615949] [2023-11-06 21:54:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:46,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:47,067 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:47,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903401063] [2023-11-06 21:54:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:47,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:47,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:47,070 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:47,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:54:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:48,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:54:48,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:54:49,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:49,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:49,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902615949] [2023-11-06 21:54:49,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903401063] [2023-11-06 21:54:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903401063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:49,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:49,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:49,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114428908] [2023-11-06 21:54:49,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:49,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:54:49,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:49,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:54:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:54:49,516 INFO L87 Difference]: Start difference. First operand 5675 states and 9250 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:54:51,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:51,845 INFO L93 Difference]: Finished difference Result 14279 states and 23274 transitions. [2023-11-06 21:54:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:54:51,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 809 [2023-11-06 21:54:51,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:51,877 INFO L225 Difference]: With dead ends: 14279 [2023-11-06 21:54:51,877 INFO L226 Difference]: Without dead ends: 8765 [2023-11-06 21:54:51,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 805 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:54:51,894 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 1539 mSDsluCounter, 1837 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:51,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1539 Valid, 2459 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:54:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8765 states. [2023-11-06 21:54:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8765 to 5723. [2023-11-06 21:54:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 4206 states have (on average 1.5306704707560628) internal successors, (6438), 4215 states have internal predecessors, (6438), 1438 states have call successors, (1438), 78 states have call predecessors, (1438), 78 states have return successors, (1438), 1429 states have call predecessors, (1438), 1438 states have call successors, (1438) [2023-11-06 21:54:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 9314 transitions. [2023-11-06 21:54:53,502 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 9314 transitions. Word has length 809 [2023-11-06 21:54:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:53,504 INFO L495 AbstractCegarLoop]: Abstraction has 5723 states and 9314 transitions. [2023-11-06 21:54:53,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 4 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:54:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 9314 transitions. [2023-11-06 21:54:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:54:53,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:53,518 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:53,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:53,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:54:53,730 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:53,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:53,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1429068821, now seen corresponding path program 1 times [2023-11-06 21:54:53,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:53,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575082552] [2023-11-06 21:54:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:53,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:53,846 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:53,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389590971] [2023-11-06 21:54:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:53,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:53,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:53,849 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:53,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:54:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:54,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:54:54,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:55:02,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:02,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:02,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575082552] [2023-11-06 21:55:02,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:02,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389590971] [2023-11-06 21:55:02,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389590971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:02,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:02,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 21:55:02,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902731617] [2023-11-06 21:55:02,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:02,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:55:02,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:55:02,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:55:02,475 INFO L87 Difference]: Start difference. First operand 5723 states and 9314 transitions. Second operand has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:55:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:03,812 INFO L93 Difference]: Finished difference Result 12381 states and 19967 transitions. [2023-11-06 21:55:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:55:03,813 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 809 [2023-11-06 21:55:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:03,831 INFO L225 Difference]: With dead ends: 12381 [2023-11-06 21:55:03,831 INFO L226 Difference]: Without dead ends: 6819 [2023-11-06 21:55:03,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:55:03,845 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 200 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:03,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 2592 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:55:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6819 states. [2023-11-06 21:55:04,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6819 to 6187. [2023-11-06 21:55:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6187 states, 4598 states have (on average 1.5184862983906047) internal successors, (6982), 4615 states have internal predecessors, (6982), 1502 states have call successors, (1502), 86 states have call predecessors, (1502), 86 states have return successors, (1502), 1485 states have call predecessors, (1502), 1502 states have call successors, (1502) [2023-11-06 21:55:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 9986 transitions. [2023-11-06 21:55:05,028 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 9986 transitions. Word has length 809 [2023-11-06 21:55:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:05,029 INFO L495 AbstractCegarLoop]: Abstraction has 6187 states and 9986 transitions. [2023-11-06 21:55:05,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:55:05,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 9986 transitions. [2023-11-06 21:55:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:55:05,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:05,044 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:05,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:05,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:55:05,258 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:05,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1620325207, now seen corresponding path program 1 times [2023-11-06 21:55:05,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:05,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80366143] [2023-11-06 21:55:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:05,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:05,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:05,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599096490] [2023-11-06 21:55:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:05,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:05,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:05,383 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:05,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 21:55:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:06,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 21:55:06,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:55:14,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:14,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:14,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80366143] [2023-11-06 21:55:14,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:14,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599096490] [2023-11-06 21:55:14,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599096490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:14,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:14,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 21:55:14,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337353922] [2023-11-06 21:55:14,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:14,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:55:14,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:55:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:55:14,881 INFO L87 Difference]: Start difference. First operand 6187 states and 9986 transitions. Second operand has 10 states, 10 states have (on average 17.2) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:55:16,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:16,310 INFO L93 Difference]: Finished difference Result 12885 states and 20663 transitions. [2023-11-06 21:55:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:55:16,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 17.2) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 809 [2023-11-06 21:55:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:16,331 INFO L225 Difference]: With dead ends: 12885 [2023-11-06 21:55:16,332 INFO L226 Difference]: Without dead ends: 6859 [2023-11-06 21:55:16,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:55:16,346 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 191 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 3176 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:16,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 3176 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:55:16,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6859 states. [2023-11-06 21:55:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6859 to 6299. [2023-11-06 21:55:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 4710 states have (on average 1.5197452229299364) internal successors, (7158), 4727 states have internal predecessors, (7158), 1502 states have call successors, (1502), 86 states have call predecessors, (1502), 86 states have return successors, (1502), 1485 states have call predecessors, (1502), 1502 states have call successors, (1502) [2023-11-06 21:55:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 10162 transitions. [2023-11-06 21:55:17,505 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 10162 transitions. Word has length 809 [2023-11-06 21:55:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:17,506 INFO L495 AbstractCegarLoop]: Abstraction has 6299 states and 10162 transitions. [2023-11-06 21:55:17,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.2) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:55:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 10162 transitions. [2023-11-06 21:55:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:55:17,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:17,519 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:17,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:17,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:17,720 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:17,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash 417951571, now seen corresponding path program 1 times [2023-11-06 21:55:17,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:17,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147412061] [2023-11-06 21:55:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:17,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:17,880 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:17,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591945797] [2023-11-06 21:55:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:17,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:17,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:17,885 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:17,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 21:55:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:19,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 21:55:19,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:55:25,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:25,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:25,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147412061] [2023-11-06 21:55:25,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:25,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591945797] [2023-11-06 21:55:25,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591945797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:25,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:25,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 21:55:25,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708886991] [2023-11-06 21:55:25,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:25,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:55:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:55:25,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:55:25,575 INFO L87 Difference]: Start difference. First operand 6299 states and 10162 transitions. Second operand has 10 states, 10 states have (on average 17.2) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:55:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:27,223 INFO L93 Difference]: Finished difference Result 12997 states and 20823 transitions. [2023-11-06 21:55:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:55:27,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 17.2) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 809 [2023-11-06 21:55:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:27,247 INFO L225 Difference]: With dead ends: 12997 [2023-11-06 21:55:27,247 INFO L226 Difference]: Without dead ends: 6859 [2023-11-06 21:55:27,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 800 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:55:27,263 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 152 mSDsluCounter, 3757 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 4423 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:27,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 4423 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:55:27,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6859 states. [2023-11-06 21:55:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6859 to 6291. [2023-11-06 21:55:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6291 states, 4702 states have (on average 1.515525308379413) internal successors, (7126), 4719 states have internal predecessors, (7126), 1502 states have call successors, (1502), 86 states have call predecessors, (1502), 86 states have return successors, (1502), 1485 states have call predecessors, (1502), 1502 states have call successors, (1502) [2023-11-06 21:55:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6291 states to 6291 states and 10130 transitions. [2023-11-06 21:55:28,514 INFO L78 Accepts]: Start accepts. Automaton has 6291 states and 10130 transitions. Word has length 809 [2023-11-06 21:55:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:28,516 INFO L495 AbstractCegarLoop]: Abstraction has 6291 states and 10130 transitions. [2023-11-06 21:55:28,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.2) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:55:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6291 states and 10130 transitions. [2023-11-06 21:55:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:55:28,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:28,528 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:28,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:28,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:28,729 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:28,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:28,730 INFO L85 PathProgramCache]: Analyzing trace with hash -642456485, now seen corresponding path program 1 times [2023-11-06 21:55:28,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:28,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608012907] [2023-11-06 21:55:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:28,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:28,847 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:28,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561516047] [2023-11-06 21:55:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:28,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:28,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:28,849 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:28,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 21:55:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:30,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 21:55:30,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 3501 proven. 360 refuted. 0 times theorem prover too weak. 28651 trivial. 0 not checked. [2023-11-06 21:55:43,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:55:55,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:55,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608012907] [2023-11-06 21:55:55,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:55:55,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561516047] [2023-11-06 21:55:55,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561516047] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:55,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:55:55,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2023-11-06 21:55:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625099117] [2023-11-06 21:55:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:55,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:55:55,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:55:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:55:55,109 INFO L87 Difference]: Start difference. First operand 6291 states and 10130 transitions. Second operand has 10 states, 10 states have (on average 17.2) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:55:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:58,536 INFO L93 Difference]: Finished difference Result 13413 states and 21423 transitions. [2023-11-06 21:55:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:55:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 17.2) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 809 [2023-11-06 21:55:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:58,550 INFO L225 Difference]: With dead ends: 13413 [2023-11-06 21:55:58,550 INFO L226 Difference]: Without dead ends: 7283 [2023-11-06 21:55:58,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1629 GetRequests, 1598 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=240, Invalid=816, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 21:55:58,559 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 330 mSDsluCounter, 3611 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 4241 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:58,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 4241 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:55:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7283 states. [2023-11-06 21:55:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7283 to 6435. [2023-11-06 21:55:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6435 states, 4846 states have (on average 1.516714816343376) internal successors, (7350), 4863 states have internal predecessors, (7350), 1502 states have call successors, (1502), 86 states have call predecessors, (1502), 86 states have return successors, (1502), 1485 states have call predecessors, (1502), 1502 states have call successors, (1502) [2023-11-06 21:55:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 10354 transitions. [2023-11-06 21:55:59,512 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 10354 transitions. Word has length 809 [2023-11-06 21:55:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:59,514 INFO L495 AbstractCegarLoop]: Abstraction has 6435 states and 10354 transitions. [2023-11-06 21:55:59,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.2) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:55:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 10354 transitions. [2023-11-06 21:55:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:55:59,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:59,527 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:59,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:59,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 21:55:59,727 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:59,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:59,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1451803111, now seen corresponding path program 1 times [2023-11-06 21:55:59,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:59,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557399343] [2023-11-06 21:55:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:59,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:59,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:55:59,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407138904] [2023-11-06 21:55:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:59,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:59,837 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:59,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 21:56:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:00,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:56:00,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:56:10,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:56:10,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:10,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557399343] [2023-11-06 21:56:10,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:56:10,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407138904] [2023-11-06 21:56:10,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407138904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:10,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:10,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 21:56:10,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167044772] [2023-11-06 21:56:10,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:10,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:56:10,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:56:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:56:10,059 INFO L87 Difference]: Start difference. First operand 6435 states and 10354 transitions. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:56:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:12,958 INFO L93 Difference]: Finished difference Result 13183 states and 21128 transitions. [2023-11-06 21:56:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:56:12,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 809 [2023-11-06 21:56:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:12,972 INFO L225 Difference]: With dead ends: 13183 [2023-11-06 21:56:12,973 INFO L226 Difference]: Without dead ends: 6909 [2023-11-06 21:56:12,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 799 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:56:12,980 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 741 mSDsluCounter, 2613 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 3260 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:12,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 3260 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 21:56:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6909 states. [2023-11-06 21:56:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6909 to 6419. [2023-11-06 21:56:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6419 states, 4830 states have (on average 1.5167701863354037) internal successors, (7326), 4847 states have internal predecessors, (7326), 1502 states have call successors, (1502), 86 states have call predecessors, (1502), 86 states have return successors, (1502), 1485 states have call predecessors, (1502), 1502 states have call successors, (1502) [2023-11-06 21:56:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6419 states to 6419 states and 10330 transitions. [2023-11-06 21:56:13,814 INFO L78 Accepts]: Start accepts. Automaton has 6419 states and 10330 transitions. Word has length 809 [2023-11-06 21:56:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:13,815 INFO L495 AbstractCegarLoop]: Abstraction has 6419 states and 10330 transitions. [2023-11-06 21:56:13,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 10 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:56:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6419 states and 10330 transitions. [2023-11-06 21:56:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:56:13,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:13,824 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:13,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:14,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 21:56:14,025 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:14,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:14,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1844830121, now seen corresponding path program 1 times [2023-11-06 21:56:14,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:14,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855371520] [2023-11-06 21:56:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:14,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:14,137 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:56:14,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577871914] [2023-11-06 21:56:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:14,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:14,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:14,140 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:14,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 21:56:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:15,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:56:15,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:56:15,378 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:56:15,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:15,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855371520] [2023-11-06 21:56:15,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:56:15,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577871914] [2023-11-06 21:56:15,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577871914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:15,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:15,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:56:15,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799581040] [2023-11-06 21:56:15,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:15,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:56:15,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:56:15,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:56:15,382 INFO L87 Difference]: Start difference. First operand 6419 states and 10330 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:56:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:19,183 INFO L93 Difference]: Finished difference Result 27335 states and 43873 transitions. [2023-11-06 21:56:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:56:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 809 [2023-11-06 21:56:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:19,226 INFO L225 Difference]: With dead ends: 27335 [2023-11-06 21:56:19,226 INFO L226 Difference]: Without dead ends: 21077 [2023-11-06 21:56:19,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:56:19,239 INFO L413 NwaCegarLoop]: 1432 mSDtfsCounter, 1352 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 3771 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:19,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 3771 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 21:56:19,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21077 states. [2023-11-06 21:56:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21077 to 14135. [2023-11-06 21:56:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14135 states, 11033 states have (on average 1.5467234659657392) internal successors, (17065), 11066 states have internal predecessors, (17065), 2918 states have call successors, (2918), 183 states have call predecessors, (2918), 183 states have return successors, (2918), 2885 states have call predecessors, (2918), 2918 states have call successors, (2918) [2023-11-06 21:56:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14135 states to 14135 states and 22901 transitions. [2023-11-06 21:56:21,423 INFO L78 Accepts]: Start accepts. Automaton has 14135 states and 22901 transitions. Word has length 809 [2023-11-06 21:56:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:21,424 INFO L495 AbstractCegarLoop]: Abstraction has 14135 states and 22901 transitions. [2023-11-06 21:56:21,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:56:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 14135 states and 22901 transitions. [2023-11-06 21:56:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2023-11-06 21:56:21,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:21,436 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:21,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:21,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 21:56:21,637 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:21,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:21,637 INFO L85 PathProgramCache]: Analyzing trace with hash 421551065, now seen corresponding path program 1 times [2023-11-06 21:56:21,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:21,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165258438] [2023-11-06 21:56:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:21,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:21,735 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:56:21,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793478980] [2023-11-06 21:56:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:21,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:21,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:21,738 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:21,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 21:56:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:22,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:56:22,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 15308 proven. 240 refuted. 0 times theorem prover too weak. 16964 trivial. 0 not checked. [2023-11-06 21:56:24,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:56:25,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:25,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165258438] [2023-11-06 21:56:25,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:56:25,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793478980] [2023-11-06 21:56:25,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793478980] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:25,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:56:25,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2023-11-06 21:56:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485026095] [2023-11-06 21:56:25,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:25,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:56:25,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:25,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:56:25,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:56:25,786 INFO L87 Difference]: Start difference. First operand 14135 states and 22901 transitions. Second operand has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:56:30,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:30,411 INFO L93 Difference]: Finished difference Result 35775 states and 57466 transitions. [2023-11-06 21:56:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:56:30,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 809 [2023-11-06 21:56:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:30,448 INFO L225 Difference]: With dead ends: 35775 [2023-11-06 21:56:30,448 INFO L226 Difference]: Without dead ends: 21805 [2023-11-06 21:56:30,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1618 GetRequests, 1606 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:56:30,464 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 752 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:30,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 1657 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 21:56:30,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21805 states. [2023-11-06 21:56:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21805 to 14547. [2023-11-06 21:56:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14547 states, 11428 states have (on average 1.552327616380819) internal successors, (17740), 11461 states have internal predecessors, (17740), 2918 states have call successors, (2918), 200 states have call predecessors, (2918), 200 states have return successors, (2918), 2885 states have call predecessors, (2918), 2918 states have call successors, (2918) [2023-11-06 21:56:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14547 states to 14547 states and 23576 transitions. [2023-11-06 21:56:32,654 INFO L78 Accepts]: Start accepts. Automaton has 14547 states and 23576 transitions. Word has length 809 [2023-11-06 21:56:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:32,775 INFO L495 AbstractCegarLoop]: Abstraction has 14547 states and 23576 transitions. [2023-11-06 21:56:32,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.4) internal successors, (172), 5 states have internal predecessors, (172), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-06 21:56:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 14547 states and 23576 transitions. [2023-11-06 21:56:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2023-11-06 21:56:32,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:32,786 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:32,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:32,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 21:56:32,987 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:32,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1164878395, now seen corresponding path program 1 times [2023-11-06 21:56:32,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:32,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286243719] [2023-11-06 21:56:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:32,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:33,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:56:33,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248381754] [2023-11-06 21:56:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:33,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:33,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:33,096 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:33,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c93228d4-9be1-4318-b526-8708bd79bd55/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 21:56:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:34,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 21:56:34,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-06 21:56:42,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:56:42,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286243719] [2023-11-06 21:56:42,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:56:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248381754] [2023-11-06 21:56:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248381754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:42,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:42,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 21:56:42,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471184988] [2023-11-06 21:56:42,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:42,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:56:42,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:42,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:56:42,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:56:42,547 INFO L87 Difference]: Start difference. First operand 14547 states and 23576 transitions. Second operand has 11 states, 11 states have (on average 15.727272727272727) internal successors, (173), 10 states have internal predecessors, (173), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128)