./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/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_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/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_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/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 aed545729ad989c8c40e84d3e267f99bbd3da53e52f3c825ab93de12dff6c66d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:03:54,461 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:03:54,587 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:03:54,594 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:03:54,595 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:03:54,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:03:54,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:03:54,628 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:03:54,630 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:03:54,630 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:03:54,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:03:54,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:03:54,634 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:03:54,635 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:03:54,635 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:03:54,636 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:03:54,637 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:03:54,638 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:03:54,638 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:03:54,639 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:03:54,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:03:54,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:03:54,641 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:03:54,642 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:03:54,642 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:03:54,643 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:03:54,644 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:03:54,644 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:03:54,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:03:54,646 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:03:54,646 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:03:54,647 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:03:54,648 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:03:54,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:03:54,649 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:03:54,650 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:03:54,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:03:54,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:03:54,651 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:03:54,652 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_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aed545729ad989c8c40e84d3e267f99bbd3da53e52f3c825ab93de12dff6c66d [2023-11-06 22:03:54,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:03:55,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:03:55,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:03:55,045 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:03:55,046 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:03:55,047 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i [2023-11-06 22:03:58,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:03:59,039 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:03:59,040 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i [2023-11-06 22:03:59,062 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/data/017b4b869/97128e224a004238819c2f9bf2979f05/FLAG17d29bbf3 [2023-11-06 22:03:59,090 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/data/017b4b869/97128e224a004238819c2f9bf2979f05 [2023-11-06 22:03:59,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:03:59,109 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:03:59,112 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:03:59,112 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:03:59,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:03:59,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:03:59,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b29663c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59, skipping insertion in model container [2023-11-06 22:03:59,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:03:59,204 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:03:59,377 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_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i[916,929] [2023-11-06 22:03:59,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:03:59,716 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:03:59,734 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_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-90.i[916,929] [2023-11-06 22:03:59,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:03:59,913 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:03:59,914 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59 WrapperNode [2023-11-06 22:03:59,914 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:03:59,916 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:03:59,916 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:03:59,917 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:03:59,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:03:59,952 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:04:00,043 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 394 [2023-11-06 22:04:00,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:04:00,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:04:00,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:04:00,046 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:04:00,058 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:04:00,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:04:00,084 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:04:00,087 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:04:00,131 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:04:00,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:04:00,169 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:04:00,176 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:04:00,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:04:00,206 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:04:00,206 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:04:00,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:04:00,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (1/1) ... [2023-11-06 22:04:00,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:04:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:00,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:04:00,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:04:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:04:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:04:00,296 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:04:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:04:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:04:00,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:04:00,525 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:04:00,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:04:01,593 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:04:01,609 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:04:01,609 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:04:01,613 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:04:01 BoogieIcfgContainer [2023-11-06 22:04:01,613 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:04:01,620 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:04:01,620 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:04:01,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:04:01,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:03:59" (1/3) ... [2023-11-06 22:04:01,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6834660b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:04:01, skipping insertion in model container [2023-11-06 22:04:01,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:03:59" (2/3) ... [2023-11-06 22:04:01,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6834660b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:04:01, skipping insertion in model container [2023-11-06 22:04:01,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:04:01" (3/3) ... [2023-11-06 22:04:01,631 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-90.i [2023-11-06 22:04:01,658 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:04:01,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:04:01,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:04:01,768 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;@a3b8eaa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:04:01,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:04:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 102 states have internal predecessors, (146), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-06 22:04:01,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2023-11-06 22:04:01,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:01,828 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:01,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:01,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1517163023, now seen corresponding path program 1 times [2023-11-06 22:04:01,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:01,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131352039] [2023-11-06 22:04:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:01,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:02,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131352039] [2023-11-06 22:04:02,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:04:02,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339858012] [2023-11-06 22:04:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:02,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:02,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:02,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:02,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:04:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:03,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:04:03,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2023-11-06 22:04:03,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:03,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339858012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:03,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:03,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:04:03,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062308367] [2023-11-06 22:04:03,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:03,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:04:03,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:03,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:04:03,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:04:03,228 INFO L87 Difference]: Start difference. First operand has 159 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 102 states have internal predecessors, (146), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Second operand has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-06 22:04:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:03,296 INFO L93 Difference]: Finished difference Result 311 states and 561 transitions. [2023-11-06 22:04:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:04:03,299 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) Word has length 351 [2023-11-06 22:04:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:03,312 INFO L225 Difference]: With dead ends: 311 [2023-11-06 22:04:03,312 INFO L226 Difference]: Without dead ends: 155 [2023-11-06 22:04:03,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 350 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 22:04:03,325 INFO L413 NwaCegarLoop]: 249 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, 249 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 22:04:03,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:04:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-06 22:04:03,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2023-11-06 22:04:03,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 98 states have (on average 1.4183673469387754) internal successors, (139), 98 states have internal predecessors, (139), 55 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-06 22:04:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 249 transitions. [2023-11-06 22:04:03,411 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 249 transitions. Word has length 351 [2023-11-06 22:04:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:03,412 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 249 transitions. [2023-11-06 22:04:03,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 2 states have call successors, (55) [2023-11-06 22:04:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 249 transitions. [2023-11-06 22:04:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2023-11-06 22:04:03,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:03,424 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:03,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:03,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:04:03,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:03,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:03,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1913314257, now seen corresponding path program 1 times [2023-11-06 22:04:03,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:03,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423325392] [2023-11-06 22:04:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:03,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:03,771 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:03,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900825724] [2023-11-06 22:04:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:03,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:03,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:03,773 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:03,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:04:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:04,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:04:04,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-06 22:04:04,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:04,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:04,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423325392] [2023-11-06 22:04:04,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:04,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900825724] [2023-11-06 22:04:04,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900825724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:04,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:04,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:04:04,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881487867] [2023-11-06 22:04:04,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:04,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:04,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:04,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:04,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:04,457 INFO L87 Difference]: Start difference. First operand 155 states and 249 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-06 22:04:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:05,087 INFO L93 Difference]: Finished difference Result 671 states and 1079 transitions. [2023-11-06 22:04:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:04:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 351 [2023-11-06 22:04:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:05,102 INFO L225 Difference]: With dead ends: 671 [2023-11-06 22:04:05,102 INFO L226 Difference]: Without dead ends: 519 [2023-11-06 22:04:05,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 349 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 22:04:05,105 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 483 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:05,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 925 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:04:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-11-06 22:04:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 286. [2023-11-06 22:04:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 190 states have (on average 1.4578947368421054) internal successors, (277), 191 states have internal predecessors, (277), 93 states have call successors, (93), 2 states have call predecessors, (93), 2 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-06 22:04:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 463 transitions. [2023-11-06 22:04:05,224 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 463 transitions. Word has length 351 [2023-11-06 22:04:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:05,226 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 463 transitions. [2023-11-06 22:04:05,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-06 22:04:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 463 transitions. [2023-11-06 22:04:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2023-11-06 22:04:05,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:05,237 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:05,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:05,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:05,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:05,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:05,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1722121517, now seen corresponding path program 1 times [2023-11-06 22:04:05,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:05,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158164171] [2023-11-06 22:04:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:05,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:05,575 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:05,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117553156] [2023-11-06 22:04:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:05,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:05,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:05,578 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:04:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:06,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:04:06,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2892 proven. 63 refuted. 0 times theorem prover too weak. 2985 trivial. 0 not checked. [2023-11-06 22:04:06,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 99 proven. 63 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2023-11-06 22:04:06,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:06,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158164171] [2023-11-06 22:04:06,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:06,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117553156] [2023-11-06 22:04:06,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117553156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:06,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:06,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:04:06,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499337903] [2023-11-06 22:04:06,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:06,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:04:06,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:04:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:04:06,837 INFO L87 Difference]: Start difference. First operand 286 states and 463 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-06 22:04:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:07,467 INFO L93 Difference]: Finished difference Result 579 states and 931 transitions. [2023-11-06 22:04:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:04:07,468 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 351 [2023-11-06 22:04:07,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:07,475 INFO L225 Difference]: With dead ends: 579 [2023-11-06 22:04:07,476 INFO L226 Difference]: Without dead ends: 296 [2023-11-06 22:04:07,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:04:07,479 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 264 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:07,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 439 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:04:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-06 22:04:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 294. [2023-11-06 22:04:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 196 states have (on average 1.4285714285714286) internal successors, (280), 197 states have internal predecessors, (280), 93 states have call successors, (93), 4 states have call predecessors, (93), 4 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-06 22:04:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 466 transitions. [2023-11-06 22:04:07,539 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 466 transitions. Word has length 351 [2023-11-06 22:04:07,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:07,541 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 466 transitions. [2023-11-06 22:04:07,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-06 22:04:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 466 transitions. [2023-11-06 22:04:07,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2023-11-06 22:04:07,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:07,552 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:07,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:07,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:07,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:07,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 344296298, now seen corresponding path program 1 times [2023-11-06 22:04:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:07,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404750082] [2023-11-06 22:04:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:07,917 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:07,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6207103] [2023-11-06 22:04:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:07,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:07,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:07,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:07,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:04:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:08,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:04:08,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-06 22:04:08,399 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:08,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:08,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404750082] [2023-11-06 22:04:08,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:08,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6207103] [2023-11-06 22:04:08,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6207103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:08,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:08,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:04:08,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308633485] [2023-11-06 22:04:08,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:08,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:04:08,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:08,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:04:08,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:04:08,406 INFO L87 Difference]: Start difference. First operand 294 states and 466 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-06 22:04:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:08,528 INFO L93 Difference]: Finished difference Result 675 states and 1076 transitions. [2023-11-06 22:04:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:04:08,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 352 [2023-11-06 22:04:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:08,540 INFO L225 Difference]: With dead ends: 675 [2023-11-06 22:04:08,540 INFO L226 Difference]: Without dead ends: 384 [2023-11-06 22:04:08,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 350 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 22:04:08,548 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 72 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:08,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 478 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:04:08,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-11-06 22:04:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 370. [2023-11-06 22:04:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 272 states have (on average 1.5) internal successors, (408), 273 states have internal predecessors, (408), 93 states have call successors, (93), 4 states have call predecessors, (93), 4 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-06 22:04:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 594 transitions. [2023-11-06 22:04:08,614 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 594 transitions. Word has length 352 [2023-11-06 22:04:08,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:08,616 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 594 transitions. [2023-11-06 22:04:08,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-06 22:04:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 594 transitions. [2023-11-06 22:04:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2023-11-06 22:04:08,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:08,632 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:08,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:04:08,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:08,840 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:08,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1730499692, now seen corresponding path program 1 times [2023-11-06 22:04:08,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:08,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132604934] [2023-11-06 22:04:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:08,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:08,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:08,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293555959] [2023-11-06 22:04:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:08,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:08,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:08,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:08,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:04:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:09,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:04:09,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2562 proven. 48 refuted. 0 times theorem prover too weak. 3330 trivial. 0 not checked. [2023-11-06 22:04:09,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 114 proven. 48 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2023-11-06 22:04:10,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:10,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132604934] [2023-11-06 22:04:10,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:10,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293555959] [2023-11-06 22:04:10,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293555959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:10,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:10,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:04:10,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577728451] [2023-11-06 22:04:10,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:10,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:04:10,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:10,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:04:10,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:04:10,047 INFO L87 Difference]: Start difference. First operand 370 states and 594 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-06 22:04:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:10,628 INFO L93 Difference]: Finished difference Result 586 states and 933 transitions. [2023-11-06 22:04:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:04:10,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) Word has length 352 [2023-11-06 22:04:10,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:10,634 INFO L225 Difference]: With dead ends: 586 [2023-11-06 22:04:10,634 INFO L226 Difference]: Without dead ends: 219 [2023-11-06 22:04:10,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 696 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 22:04:10,636 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 275 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:10,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 438 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:04:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-06 22:04:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 205. [2023-11-06 22:04:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 145 states have (on average 1.4413793103448276) internal successors, (209), 145 states have internal predecessors, (209), 55 states have call successors, (55), 4 states have call predecessors, (55), 4 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-06 22:04:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 319 transitions. [2023-11-06 22:04:10,671 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 319 transitions. Word has length 352 [2023-11-06 22:04:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:10,672 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 319 transitions. [2023-11-06 22:04:10,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 2 states have call successors, (71), 2 states have call predecessors, (71), 4 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-06 22:04:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 319 transitions. [2023-11-06 22:04:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-06 22:04:10,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:10,681 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:10,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:10,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:10,889 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:10,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash -579353413, now seen corresponding path program 1 times [2023-11-06 22:04:10,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:10,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983819795] [2023-11-06 22:04:10,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:10,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:11,037 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:11,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436610572] [2023-11-06 22:04:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:11,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:11,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:11,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:11,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:04:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:11,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:04:11,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 1320 proven. 15 refuted. 0 times theorem prover too weak. 4605 trivial. 0 not checked. [2023-11-06 22:04:11,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 303 proven. 18 refuted. 0 times theorem prover too weak. 5619 trivial. 0 not checked. [2023-11-06 22:04:12,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:12,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983819795] [2023-11-06 22:04:12,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:12,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436610572] [2023-11-06 22:04:12,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436610572] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:12,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:04:12,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-11-06 22:04:12,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350115529] [2023-11-06 22:04:12,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:12,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:04:12,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:12,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:04:12,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:04:12,570 INFO L87 Difference]: Start difference. First operand 205 states and 319 transitions. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 2 states have call successors, (61), 2 states have call predecessors, (61), 6 states have return successors, (62), 3 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:04:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:14,237 INFO L93 Difference]: Finished difference Result 560 states and 849 transitions. [2023-11-06 22:04:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:04:14,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 2 states have call successors, (61), 2 states have call predecessors, (61), 6 states have return successors, (62), 3 states have call predecessors, (62), 2 states have call successors, (62) Word has length 353 [2023-11-06 22:04:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:14,243 INFO L225 Difference]: With dead ends: 560 [2023-11-06 22:04:14,243 INFO L226 Difference]: Without dead ends: 358 [2023-11-06 22:04:14,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 692 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:04:14,246 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 677 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:14,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 805 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:04:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-06 22:04:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 213. [2023-11-06 22:04:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 151 states have internal predecessors, (211), 55 states have call successors, (55), 6 states have call predecessors, (55), 6 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-06 22:04:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 321 transitions. [2023-11-06 22:04:14,300 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 321 transitions. Word has length 353 [2023-11-06 22:04:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:14,303 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 321 transitions. [2023-11-06 22:04:14,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 2 states have call successors, (61), 2 states have call predecessors, (61), 6 states have return successors, (62), 3 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:04:14,303 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 321 transitions. [2023-11-06 22:04:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-06 22:04:14,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:14,308 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:14,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:14,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:04:14,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:14,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:14,519 INFO L85 PathProgramCache]: Analyzing trace with hash -517313799, now seen corresponding path program 1 times [2023-11-06 22:04:14,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:14,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599338206] [2023-11-06 22:04:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:14,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:14,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133996503] [2023-11-06 22:04:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:14,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:14,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:14,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:14,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:04:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:15,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:04:15,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2023-11-06 22:04:16,761 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:16,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:16,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599338206] [2023-11-06 22:04:16,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:16,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133996503] [2023-11-06 22:04:16,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133996503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:16,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:16,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:04:16,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063560858] [2023-11-06 22:04:16,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:16,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:04:16,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:04:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:04:16,766 INFO L87 Difference]: Start difference. First operand 213 states and 321 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 3 states have internal predecessors, (81), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-06 22:04:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:17,213 INFO L93 Difference]: Finished difference Result 596 states and 895 transitions. [2023-11-06 22:04:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:04:17,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 3 states have internal predecessors, (81), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) Word has length 353 [2023-11-06 22:04:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:17,222 INFO L225 Difference]: With dead ends: 596 [2023-11-06 22:04:17,223 INFO L226 Difference]: Without dead ends: 386 [2023-11-06 22:04:17,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 350 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 22:04:17,225 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 133 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:17,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 687 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:04:17,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-06 22:04:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 340. [2023-11-06 22:04:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 217 states have (on average 1.3133640552995391) internal successors, (285), 217 states have internal predecessors, (285), 110 states have call successors, (110), 12 states have call predecessors, (110), 12 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2023-11-06 22:04:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 505 transitions. [2023-11-06 22:04:17,313 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 505 transitions. Word has length 353 [2023-11-06 22:04:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:17,314 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 505 transitions. [2023-11-06 22:04:17,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 3 states have internal predecessors, (81), 1 states have call successors, (55), 1 states have call predecessors, (55), 1 states have return successors, (55), 1 states have call predecessors, (55), 1 states have call successors, (55) [2023-11-06 22:04:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 505 transitions. [2023-11-06 22:04:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2023-11-06 22:04:17,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:17,319 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:17,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:17,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:04:17,536 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:17,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:17,537 INFO L85 PathProgramCache]: Analyzing trace with hash 295012297, now seen corresponding path program 1 times [2023-11-06 22:04:17,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:17,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708723243] [2023-11-06 22:04:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:17,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:17,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:17,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231543868] [2023-11-06 22:04:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:17,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:17,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:17,669 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:17,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad3c11b1-8fd7-4d14-8ee2-97d2d0199a3c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:04:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:18,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-06 22:04:18,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 3378 proven. 843 refuted. 0 times theorem prover too weak. 1719 trivial. 0 not checked. [2023-11-06 22:04:30,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 411 proven. 660 refuted. 0 times theorem prover too weak. 4869 trivial. 0 not checked. [2023-11-06 22:05:46,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:46,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708723243] [2023-11-06 22:05:46,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:05:46,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231543868] [2023-11-06 22:05:46,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231543868] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:46,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:05:46,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 35] total 74 [2023-11-06 22:05:46,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951466738] [2023-11-06 22:05:46,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:46,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-06 22:05:46,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:46,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-06 22:05:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=4219, Unknown=1, NotChecked=0, Total=5402 [2023-11-06 22:05:46,225 INFO L87 Difference]: Start difference. First operand 340 states and 505 transitions. Second operand has 74 states, 69 states have (on average 3.130434782608696) internal successors, (216), 65 states have internal predecessors, (216), 21 states have call successors, (110), 12 states have call predecessors, (110), 22 states have return successors, (110), 19 states have call predecessors, (110), 21 states have call successors, (110) [2023-11-06 22:05:56,174 WARN L293 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 309 DAG size of output: 256 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:06:13,863 WARN L293 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 299 DAG size of output: 227 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:06:30,509 WARN L293 SmtUtils]: Spent 9.14s on a formula simplification. DAG size of input: 289 DAG size of output: 218 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:06:43,975 WARN L293 SmtUtils]: Spent 12.36s on a formula simplification. DAG size of input: 295 DAG size of output: 224 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:06:55,485 WARN L293 SmtUtils]: Spent 10.73s on a formula simplification. DAG size of input: 298 DAG size of output: 227 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:07:05,148 WARN L293 SmtUtils]: Spent 8.90s on a formula simplification. DAG size of input: 304 DAG size of output: 233 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:07:16,282 WARN L293 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 308 DAG size of output: 237 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:07:26,522 WARN L293 SmtUtils]: Spent 9.39s on a formula simplification. DAG size of input: 303 DAG size of output: 232 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:07:35,431 WARN L293 SmtUtils]: Spent 8.60s on a formula simplification. DAG size of input: 306 DAG size of output: 235 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:07:45,573 WARN L293 SmtUtils]: Spent 9.71s on a formula simplification. DAG size of input: 302 DAG size of output: 230 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:07:56,348 WARN L293 SmtUtils]: Spent 10.24s on a formula simplification. DAG size of input: 305 DAG size of output: 234 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)