./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-92.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-92.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad609929f6a2bce9c8e7d6ce2810824c22896d2feba55c71bcd35f06aeaf9282 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:44:53,207 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:44:53,296 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:44:53,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:44:53,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:44:53,326 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:44:53,326 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:44:53,327 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:44:53,328 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:44:53,329 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:44:53,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:44:53,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:44:53,331 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:44:53,331 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:44:53,332 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:44:53,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:44:53,333 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:44:53,334 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:44:53,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:44:53,335 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:44:53,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:44:53,336 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:44:53,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:44:53,337 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:44:53,337 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:44:53,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:44:53,338 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:44:53,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:44:53,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:44:53,339 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:44:53,340 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:44:53,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:53,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:44:53,341 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:44:53,341 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:44:53,341 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:44:53,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:44:53,342 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:44:53,342 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:44:53,342 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:44:53,343 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:44:53,343 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:44:53,343 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_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad609929f6a2bce9c8e7d6ce2810824c22896d2feba55c71bcd35f06aeaf9282 [2023-11-26 11:44:53,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:44:53,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:44:53,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:44:53,636 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:44:53,636 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:44:53,638 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-92.i [2023-11-26 11:44:56,877 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:44:57,211 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:44:57,212 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-92.i [2023-11-26 11:44:57,229 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/data/00d751523/ec9519a50d494958a630a4580eb2c943/FLAGee2a13059 [2023-11-26 11:44:57,245 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/data/00d751523/ec9519a50d494958a630a4580eb2c943 [2023-11-26 11:44:57,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:44:57,253 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:44:57,255 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:57,256 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:44:57,262 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:44:57,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:57" (1/1) ... [2023-11-26 11:44:57,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fca9889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:57, skipping insertion in model container [2023-11-26 11:44:57,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:57" (1/1) ... [2023-11-26 11:44:57,339 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:44:57,497 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_a57f1086-1ee8-4d1f-a617-ab13a9441558/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-92.i[916,929] [2023-11-26 11:44:57,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:57,823 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:44:57,846 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_a57f1086-1ee8-4d1f-a617-ab13a9441558/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-92.i[916,929] [2023-11-26 11:44:57,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:58,004 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:44:58,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58 WrapperNode [2023-11-26 11:44:58,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:58,006 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:58,006 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:44:58,006 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:44:58,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,185 INFO L138 Inliner]: procedures = 26, calls = 81, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 598 [2023-11-26 11:44:58,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:58,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:44:58,187 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:44:58,187 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:44:58,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,219 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,367 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:44:58,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,403 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,413 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,421 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,430 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:44:58,447 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:44:58,447 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:44:58,447 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:44:58,448 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (1/1) ... [2023-11-26 11:44:58,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:58,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:58,482 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:44:58,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:44:58,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:44:58,538 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:44:58,539 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:44:58,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:44:58,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:44:58,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:44:58,699 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:44:58,701 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:44:59,803 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:44:59,865 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:44:59,866 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:44:59,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:59 BoogieIcfgContainer [2023-11-26 11:44:59,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:44:59,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:44:59,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:44:59,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:44:59,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:44:57" (1/3) ... [2023-11-26 11:44:59,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253f5a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:59, skipping insertion in model container [2023-11-26 11:44:59,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:58" (2/3) ... [2023-11-26 11:44:59,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253f5a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:59, skipping insertion in model container [2023-11-26 11:44:59,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:59" (3/3) ... [2023-11-26 11:44:59,876 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-92.i [2023-11-26 11:44:59,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:44:59,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:44:59,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:44:59,965 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@529a227f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:44:59,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:44:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 235 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 165 states have internal predecessors, (256), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-26 11:45:00,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-26 11:45:00,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:00,009 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:00,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:00,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:00,017 INFO L85 PathProgramCache]: Analyzing trace with hash -565475387, now seen corresponding path program 1 times [2023-11-26 11:45:00,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:00,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176218973] [2023-11-26 11:45:00,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:00,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:00,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176218973] [2023-11-26 11:45:00,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:45:00,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327292185] [2023-11-26 11:45:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:00,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:00,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:00,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:00,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:45:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:01,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:45:01,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2023-11-26 11:45:01,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:01,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327292185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:01,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:01,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:01,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203158987] [2023-11-26 11:45:01,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:01,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:45:01,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:45:01,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:45:01,213 INFO L87 Difference]: Start difference. First operand has 235 states, 164 states have (on average 1.5609756097560976) internal successors, (256), 165 states have internal predecessors, (256), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) Second operand has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-26 11:45:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:01,351 INFO L93 Difference]: Finished difference Result 467 states and 850 transitions. [2023-11-26 11:45:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:45:01,356 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) Word has length 462 [2023-11-26 11:45:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:01,370 INFO L225 Difference]: With dead ends: 467 [2023-11-26 11:45:01,370 INFO L226 Difference]: Without dead ends: 233 [2023-11-26 11:45:01,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:45:01,386 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:01,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 382 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:45:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-11-26 11:45:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2023-11-26 11:45:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 163 states have (on average 1.5276073619631902) internal successors, (249), 163 states have internal predecessors, (249), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-26 11:45:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 385 transitions. [2023-11-26 11:45:01,496 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 385 transitions. Word has length 462 [2023-11-26 11:45:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:01,498 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 385 transitions. [2023-11-26 11:45:01,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-26 11:45:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 385 transitions. [2023-11-26 11:45:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-26 11:45:01,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:01,520 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:01,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:45:01,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:45:01,728 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:01,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash 880450641, now seen corresponding path program 1 times [2023-11-26 11:45:01,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:01,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207715235] [2023-11-26 11:45:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:01,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:01,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:01,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96858755] [2023-11-26 11:45:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:01,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:01,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:01,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:01,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:45:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:02,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:45:02,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:03,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:03,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:03,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207715235] [2023-11-26 11:45:03,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:03,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96858755] [2023-11-26 11:45:03,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96858755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:03,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:03,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:03,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016546543] [2023-11-26 11:45:03,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:03,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:03,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:03,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:03,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:03,268 INFO L87 Difference]: Start difference. First operand 233 states and 385 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:03,666 INFO L93 Difference]: Finished difference Result 810 states and 1345 transitions. [2023-11-26 11:45:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:03,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 462 [2023-11-26 11:45:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:03,695 INFO L225 Difference]: With dead ends: 810 [2023-11-26 11:45:03,696 INFO L226 Difference]: Without dead ends: 578 [2023-11-26 11:45:03,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:45:03,699 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 695 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:03,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 1515 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:45:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-26 11:45:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 462. [2023-11-26 11:45:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 323 states have (on average 1.5263157894736843) internal successors, (493), 323 states have internal predecessors, (493), 136 states have call successors, (136), 2 states have call predecessors, (136), 2 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2023-11-26 11:45:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 765 transitions. [2023-11-26 11:45:03,787 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 765 transitions. Word has length 462 [2023-11-26 11:45:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:03,789 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 765 transitions. [2023-11-26 11:45:03,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 765 transitions. [2023-11-26 11:45:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2023-11-26 11:45:03,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:03,798 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:03,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:04,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:04,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:04,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash -948712493, now seen corresponding path program 1 times [2023-11-26 11:45:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:04,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474468011] [2023-11-26 11:45:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:04,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:04,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:04,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880753689] [2023-11-26 11:45:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:04,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:04,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:04,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:04,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:45:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:04,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:45:04,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:04,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:04,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:04,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474468011] [2023-11-26 11:45:04,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:04,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880753689] [2023-11-26 11:45:04,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880753689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:04,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:04,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436639181] [2023-11-26 11:45:04,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:04,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:04,670 INFO L87 Difference]: Start difference. First operand 462 states and 765 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:04,792 INFO L93 Difference]: Finished difference Result 1154 states and 1915 transitions. [2023-11-26 11:45:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:04,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 462 [2023-11-26 11:45:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:04,800 INFO L225 Difference]: With dead ends: 1154 [2023-11-26 11:45:04,800 INFO L226 Difference]: Without dead ends: 693 [2023-11-26 11:45:04,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:04,803 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 189 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:04,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 730 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:45:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-26 11:45:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 689. [2023-11-26 11:45:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 540 states have (on average 1.5777777777777777) internal successors, (852), 542 states have internal predecessors, (852), 144 states have call successors, (144), 4 states have call predecessors, (144), 4 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2023-11-26 11:45:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1140 transitions. [2023-11-26 11:45:04,899 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1140 transitions. Word has length 462 [2023-11-26 11:45:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:04,917 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 1140 transitions. [2023-11-26 11:45:04,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1140 transitions. [2023-11-26 11:45:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-26 11:45:04,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:04,923 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:04,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:05,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:05,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:05,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:05,133 INFO L85 PathProgramCache]: Analyzing trace with hash 644371723, now seen corresponding path program 1 times [2023-11-26 11:45:05,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:05,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548151183] [2023-11-26 11:45:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:05,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:05,257 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:05,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583991164] [2023-11-26 11:45:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:05,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:05,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:05,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:05,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:45:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:05,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:45:05,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:05,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:05,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:05,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548151183] [2023-11-26 11:45:05,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:05,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583991164] [2023-11-26 11:45:05,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583991164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:05,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:05,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:05,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652152596] [2023-11-26 11:45:05,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:05,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:05,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:05,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:05,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:05,790 INFO L87 Difference]: Start difference. First operand 689 states and 1140 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:05,916 INFO L93 Difference]: Finished difference Result 2029 states and 3354 transitions. [2023-11-26 11:45:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 463 [2023-11-26 11:45:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:05,929 INFO L225 Difference]: With dead ends: 2029 [2023-11-26 11:45:05,929 INFO L226 Difference]: Without dead ends: 1341 [2023-11-26 11:45:05,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:05,933 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 349 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:05,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 854 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:45:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2023-11-26 11:45:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 799. [2023-11-26 11:45:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 650 states have (on average 1.593846153846154) internal successors, (1036), 652 states have internal predecessors, (1036), 144 states have call successors, (144), 4 states have call predecessors, (144), 4 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2023-11-26 11:45:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1324 transitions. [2023-11-26 11:45:06,122 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1324 transitions. Word has length 463 [2023-11-26 11:45:06,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:06,126 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1324 transitions. [2023-11-26 11:45:06,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1324 transitions. [2023-11-26 11:45:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-26 11:45:06,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:06,134 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:06,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:06,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:06,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:06,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:06,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1205071501, now seen corresponding path program 1 times [2023-11-26 11:45:06,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:06,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55871651] [2023-11-26 11:45:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:06,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:06,435 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:06,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850545969] [2023-11-26 11:45:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:06,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:06,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:06,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:06,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:45:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:06,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:45:06,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:08,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:08,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:08,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55871651] [2023-11-26 11:45:08,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850545969] [2023-11-26 11:45:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850545969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:08,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:08,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:08,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931385057] [2023-11-26 11:45:08,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:08,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:45:08,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:45:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:45:08,695 INFO L87 Difference]: Start difference. First operand 799 states and 1324 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:08,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:08,843 INFO L93 Difference]: Finished difference Result 1776 states and 2931 transitions. [2023-11-26 11:45:08,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:08,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 463 [2023-11-26 11:45:08,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:08,853 INFO L225 Difference]: With dead ends: 1776 [2023-11-26 11:45:08,854 INFO L226 Difference]: Without dead ends: 978 [2023-11-26 11:45:08,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:45:08,858 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 18 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:08,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1138 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:45:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2023-11-26 11:45:09,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 978. [2023-11-26 11:45:09,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 759 states have (on average 1.5546772068511199) internal successors, (1180), 761 states have internal predecessors, (1180), 212 states have call successors, (212), 6 states have call predecessors, (212), 6 states have return successors, (212), 210 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-26 11:45:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1604 transitions. [2023-11-26 11:45:09,025 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1604 transitions. Word has length 463 [2023-11-26 11:45:09,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:09,026 INFO L495 AbstractCegarLoop]: Abstraction has 978 states and 1604 transitions. [2023-11-26 11:45:09,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:09,027 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1604 transitions. [2023-11-26 11:45:09,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-26 11:45:09,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:09,032 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:09,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:09,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:09,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:09,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:09,242 INFO L85 PathProgramCache]: Analyzing trace with hash 525799247, now seen corresponding path program 1 times [2023-11-26 11:45:09,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:09,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817808222] [2023-11-26 11:45:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:09,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:09,350 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:09,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471674405] [2023-11-26 11:45:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:09,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:09,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:09,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:09,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:45:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:09,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:45:09,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 1083 proven. 189 refuted. 0 times theorem prover too weak. 7840 trivial. 0 not checked. [2023-11-26 11:45:10,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 12 proven. 189 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-26 11:45:10,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:10,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817808222] [2023-11-26 11:45:10,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:10,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471674405] [2023-11-26 11:45:10,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471674405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:10,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:10,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:45:10,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100626443] [2023-11-26 11:45:10,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:10,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:45:10,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:45:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:45:10,970 INFO L87 Difference]: Start difference. First operand 978 states and 1604 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) [2023-11-26 11:45:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:11,602 INFO L93 Difference]: Finished difference Result 1512 states and 2474 transitions. [2023-11-26 11:45:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:45:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) Word has length 463 [2023-11-26 11:45:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:11,610 INFO L225 Difference]: With dead ends: 1512 [2023-11-26 11:45:11,610 INFO L226 Difference]: Without dead ends: 692 [2023-11-26 11:45:11,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 918 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:45:11,614 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 392 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:11,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 755 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:45:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2023-11-26 11:45:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 684. [2023-11-26 11:45:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 472 states have (on average 1.4639830508474576) internal successors, (691), 472 states have internal predecessors, (691), 204 states have call successors, (204), 7 states have call predecessors, (204), 7 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-26 11:45:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1099 transitions. [2023-11-26 11:45:11,712 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1099 transitions. Word has length 463 [2023-11-26 11:45:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:11,713 INFO L495 AbstractCegarLoop]: Abstraction has 684 states and 1099 transitions. [2023-11-26 11:45:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (131), 2 states have call predecessors, (131), 4 states have return successors, (132), 2 states have call predecessors, (132), 2 states have call successors, (132) [2023-11-26 11:45:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1099 transitions. [2023-11-26 11:45:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-26 11:45:11,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:11,719 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:11,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:11,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:11,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:11,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash -450217907, now seen corresponding path program 1 times [2023-11-26 11:45:11,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:11,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982755631] [2023-11-26 11:45:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:11,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:12,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:12,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96842103] [2023-11-26 11:45:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:12,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:12,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:12,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:12,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:45:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:12,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:45:12,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:12,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:12,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:12,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982755631] [2023-11-26 11:45:12,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:12,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96842103] [2023-11-26 11:45:12,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96842103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:12,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:12,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:12,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088191589] [2023-11-26 11:45:12,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:12,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:12,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:12,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:12,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:12,613 INFO L87 Difference]: Start difference. First operand 684 states and 1099 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:12,787 INFO L93 Difference]: Finished difference Result 1604 states and 2587 transitions. [2023-11-26 11:45:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 463 [2023-11-26 11:45:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:12,798 INFO L225 Difference]: With dead ends: 1604 [2023-11-26 11:45:12,799 INFO L226 Difference]: Without dead ends: 1082 [2023-11-26 11:45:12,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:12,806 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 294 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:12,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 764 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:45:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2023-11-26 11:45:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 768. [2023-11-26 11:45:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 556 states have (on average 1.4946043165467626) internal successors, (831), 556 states have internal predecessors, (831), 204 states have call successors, (204), 7 states have call predecessors, (204), 7 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-26 11:45:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1239 transitions. [2023-11-26 11:45:12,951 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1239 transitions. Word has length 463 [2023-11-26 11:45:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:12,952 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1239 transitions. [2023-11-26 11:45:12,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:12,953 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1239 transitions. [2023-11-26 11:45:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-26 11:45:12,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:12,958 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:12,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 11:45:13,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:13,168 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:13,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash 163575629, now seen corresponding path program 1 times [2023-11-26 11:45:13,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:13,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942110673] [2023-11-26 11:45:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:13,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:13,276 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:13,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884819342] [2023-11-26 11:45:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:13,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:13,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:13,278 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:13,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:45:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:13,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:45:13,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:13,855 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:13,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:13,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942110673] [2023-11-26 11:45:13,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:13,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884819342] [2023-11-26 11:45:13,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884819342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:13,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:13,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:45:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625967915] [2023-11-26 11:45:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:13,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:45:13,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:45:13,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:45:13,860 INFO L87 Difference]: Start difference. First operand 768 states and 1239 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:14,419 INFO L93 Difference]: Finished difference Result 1940 states and 3133 transitions. [2023-11-26 11:45:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:45:14,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 463 [2023-11-26 11:45:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:14,431 INFO L225 Difference]: With dead ends: 1940 [2023-11-26 11:45:14,431 INFO L226 Difference]: Without dead ends: 1334 [2023-11-26 11:45:14,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:45:14,435 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 1126 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:14,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 1480 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:45:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2023-11-26 11:45:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 870. [2023-11-26 11:45:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 656 states have (on average 1.4984756097560976) internal successors, (983), 656 states have internal predecessors, (983), 204 states have call successors, (204), 9 states have call predecessors, (204), 9 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-26 11:45:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1391 transitions. [2023-11-26 11:45:14,691 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1391 transitions. Word has length 463 [2023-11-26 11:45:14,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:14,692 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1391 transitions. [2023-11-26 11:45:14,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:14,693 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1391 transitions. [2023-11-26 11:45:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-26 11:45:14,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:14,700 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:14,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-26 11:45:14,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:14,910 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:14,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1819958311, now seen corresponding path program 1 times [2023-11-26 11:45:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:14,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348024250] [2023-11-26 11:45:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:14,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:15,021 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:15,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877056426] [2023-11-26 11:45:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:15,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:15,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:15,023 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:15,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:45:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:15,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:45:15,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 1971 proven. 177 refuted. 0 times theorem prover too weak. 6964 trivial. 0 not checked. [2023-11-26 11:45:16,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 24 proven. 177 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-26 11:45:16,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:16,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348024250] [2023-11-26 11:45:16,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:16,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877056426] [2023-11-26 11:45:16,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877056426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:16,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:16,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 11:45:16,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056773699] [2023-11-26 11:45:16,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:16,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:45:16,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:45:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:45:16,754 INFO L87 Difference]: Start difference. First operand 870 states and 1391 transitions. Second operand has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) [2023-11-26 11:45:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:17,478 INFO L93 Difference]: Finished difference Result 1624 states and 2587 transitions. [2023-11-26 11:45:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:45:17,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) Word has length 464 [2023-11-26 11:45:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:17,489 INFO L225 Difference]: With dead ends: 1624 [2023-11-26 11:45:17,490 INFO L226 Difference]: Without dead ends: 894 [2023-11-26 11:45:17,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:45:17,494 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 562 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:17,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1031 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:45:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-11-26 11:45:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 882. [2023-11-26 11:45:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 665 states have (on average 1.4857142857142858) internal successors, (988), 665 states have internal predecessors, (988), 204 states have call successors, (204), 12 states have call predecessors, (204), 12 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-26 11:45:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1396 transitions. [2023-11-26 11:45:17,626 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1396 transitions. Word has length 464 [2023-11-26 11:45:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:17,627 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1396 transitions. [2023-11-26 11:45:17,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 3 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 3 states have call predecessors, (128), 3 states have call successors, (128) [2023-11-26 11:45:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1396 transitions. [2023-11-26 11:45:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-26 11:45:17,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:17,633 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:17,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:17,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:45:17,843 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:17,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:17,843 INFO L85 PathProgramCache]: Analyzing trace with hash 91084247, now seen corresponding path program 1 times [2023-11-26 11:45:17,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:17,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469416555] [2023-11-26 11:45:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:17,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:17,926 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:17,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400543646] [2023-11-26 11:45:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:17,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:17,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:17,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:17,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:45:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:18,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:45:18,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 841 proven. 192 refuted. 0 times theorem prover too weak. 8079 trivial. 0 not checked. [2023-11-26 11:45:20,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:23,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:23,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469416555] [2023-11-26 11:45:23,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:23,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400543646] [2023-11-26 11:45:23,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400543646] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:23,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:45:23,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2023-11-26 11:45:23,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616517529] [2023-11-26 11:45:23,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:23,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:45:23,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:45:23,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:23,894 INFO L87 Difference]: Start difference. First operand 882 states and 1396 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:25,260 INFO L93 Difference]: Finished difference Result 1656 states and 2628 transitions. [2023-11-26 11:45:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:45:25,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 464 [2023-11-26 11:45:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:25,269 INFO L225 Difference]: With dead ends: 1656 [2023-11-26 11:45:25,269 INFO L226 Difference]: Without dead ends: 952 [2023-11-26 11:45:25,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:45:25,272 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 548 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:25,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1816 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 11:45:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2023-11-26 11:45:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 948. [2023-11-26 11:45:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 725 states have (on average 1.4896551724137932) internal successors, (1080), 727 states have internal predecessors, (1080), 208 states have call successors, (208), 14 states have call predecessors, (208), 14 states have return successors, (208), 206 states have call predecessors, (208), 208 states have call successors, (208) [2023-11-26 11:45:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1496 transitions. [2023-11-26 11:45:25,431 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1496 transitions. Word has length 464 [2023-11-26 11:45:25,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:25,432 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1496 transitions. [2023-11-26 11:45:25,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1496 transitions. [2023-11-26 11:45:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-26 11:45:25,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:25,438 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:25,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:25,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:45:25,647 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:25,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash -133179945, now seen corresponding path program 1 times [2023-11-26 11:45:25,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:25,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274848375] [2023-11-26 11:45:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:25,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:25,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:25,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544354330] [2023-11-26 11:45:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:25,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:25,736 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:25,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:45:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:26,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:45:26,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:26,985 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:26,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:26,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274848375] [2023-11-26 11:45:26,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:26,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544354330] [2023-11-26 11:45:26,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544354330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:26,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:26,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:26,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701402233] [2023-11-26 11:45:26,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:26,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:26,990 INFO L87 Difference]: Start difference. First operand 948 states and 1496 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:27,981 INFO L93 Difference]: Finished difference Result 2302 states and 3652 transitions. [2023-11-26 11:45:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:45:27,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 464 [2023-11-26 11:45:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:27,994 INFO L225 Difference]: With dead ends: 2302 [2023-11-26 11:45:27,994 INFO L226 Difference]: Without dead ends: 1532 [2023-11-26 11:45:27,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:45:27,998 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 529 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:27,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1342 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:45:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2023-11-26 11:45:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1479. [2023-11-26 11:45:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1112 states have (on average 1.47931654676259) internal successors, (1645), 1114 states have internal predecessors, (1645), 344 states have call successors, (344), 22 states have call predecessors, (344), 22 states have return successors, (344), 342 states have call predecessors, (344), 344 states have call successors, (344) [2023-11-26 11:45:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 2333 transitions. [2023-11-26 11:45:28,311 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 2333 transitions. Word has length 464 [2023-11-26 11:45:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:28,312 INFO L495 AbstractCegarLoop]: Abstraction has 1479 states and 2333 transitions. [2023-11-26 11:45:28,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 4 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 2333 transitions. [2023-11-26 11:45:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-26 11:45:28,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:28,320 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:28,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-26 11:45:28,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:28,530 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:28,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 480613591, now seen corresponding path program 1 times [2023-11-26 11:45:28,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:28,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559954452] [2023-11-26 11:45:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:28,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:28,626 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:28,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46707397] [2023-11-26 11:45:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:28,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:28,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:28,628 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:28,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:45:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:29,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:45:29,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 841 proven. 192 refuted. 0 times theorem prover too weak. 8079 trivial. 0 not checked. [2023-11-26 11:45:30,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 9 proven. 192 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-26 11:45:32,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:32,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559954452] [2023-11-26 11:45:32,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:32,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46707397] [2023-11-26 11:45:32,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46707397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:32,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:32,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-26 11:45:32,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104984792] [2023-11-26 11:45:32,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:32,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:45:32,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:45:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:32,114 INFO L87 Difference]: Start difference. First operand 1479 states and 2333 transitions. Second operand has 14 states, 14 states have (on average 17.714285714285715) internal successors, (248), 14 states have internal predecessors, (248), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-26 11:45:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:33,250 INFO L93 Difference]: Finished difference Result 2286 states and 3600 transitions. [2023-11-26 11:45:33,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:45:33,251 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.714285714285715) internal successors, (248), 14 states have internal predecessors, (248), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) Word has length 464 [2023-11-26 11:45:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:33,261 INFO L225 Difference]: With dead ends: 2286 [2023-11-26 11:45:33,261 INFO L226 Difference]: Without dead ends: 985 [2023-11-26 11:45:33,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:45:33,265 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1168 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:33,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 908 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:45:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2023-11-26 11:45:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 843. [2023-11-26 11:45:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 623 states have (on average 1.4446227929373996) internal successors, (900), 623 states have internal predecessors, (900), 204 states have call successors, (204), 15 states have call predecessors, (204), 15 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-26 11:45:33,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1308 transitions. [2023-11-26 11:45:33,433 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1308 transitions. Word has length 464 [2023-11-26 11:45:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:33,434 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 1308 transitions. [2023-11-26 11:45:33,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.714285714285715) internal successors, (248), 14 states have internal predecessors, (248), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-26 11:45:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1308 transitions. [2023-11-26 11:45:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-11-26 11:45:33,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:33,440 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:33,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:33,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:45:33,649 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:33,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash -449046148, now seen corresponding path program 1 times [2023-11-26 11:45:33,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:33,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891653529] [2023-11-26 11:45:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:33,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:33,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:33,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576760714] [2023-11-26 11:45:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:33,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:33,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:33,727 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:33,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:45:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:34,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:45:34,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:34,397 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:34,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:34,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891653529] [2023-11-26 11:45:34,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:34,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576760714] [2023-11-26 11:45:34,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576760714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:34,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:34,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:34,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482040957] [2023-11-26 11:45:34,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:34,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:34,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:34,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:34,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:34,405 INFO L87 Difference]: Start difference. First operand 843 states and 1308 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:34,701 INFO L93 Difference]: Finished difference Result 2109 states and 3292 transitions. [2023-11-26 11:45:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:34,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 466 [2023-11-26 11:45:34,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:34,714 INFO L225 Difference]: With dead ends: 2109 [2023-11-26 11:45:34,715 INFO L226 Difference]: Without dead ends: 1480 [2023-11-26 11:45:34,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:34,718 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 323 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:34,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 728 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:45:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-11-26 11:45:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1078. [2023-11-26 11:45:34,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 858 states have (on average 1.4883449883449884) internal successors, (1277), 858 states have internal predecessors, (1277), 204 states have call successors, (204), 15 states have call predecessors, (204), 15 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-26 11:45:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1685 transitions. [2023-11-26 11:45:34,911 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1685 transitions. Word has length 466 [2023-11-26 11:45:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:34,912 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 1685 transitions. [2023-11-26 11:45:34,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1685 transitions. [2023-11-26 11:45:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-11-26 11:45:34,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:34,918 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:34,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:35,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:35,128 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:35,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1325961214, now seen corresponding path program 1 times [2023-11-26 11:45:35,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:35,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928837518] [2023-11-26 11:45:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:35,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:35,207 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:35,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084715279] [2023-11-26 11:45:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:35,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:35,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:35,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:35,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:45:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:35,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:45:35,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:36,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:36,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928837518] [2023-11-26 11:45:36,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084715279] [2023-11-26 11:45:36,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084715279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:36,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:36,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:45:36,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959430647] [2023-11-26 11:45:36,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:36,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:45:36,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:45:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:45:36,495 INFO L87 Difference]: Start difference. First operand 1078 states and 1685 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:37,030 INFO L93 Difference]: Finished difference Result 2338 states and 3673 transitions. [2023-11-26 11:45:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:45:37,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 466 [2023-11-26 11:45:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:37,043 INFO L225 Difference]: With dead ends: 2338 [2023-11-26 11:45:37,043 INFO L226 Difference]: Without dead ends: 1394 [2023-11-26 11:45:37,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:37,047 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 254 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:37,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1097 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:45:37,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-11-26 11:45:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1078. [2023-11-26 11:45:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 858 states have (on average 1.4871794871794872) internal successors, (1276), 858 states have internal predecessors, (1276), 204 states have call successors, (204), 15 states have call predecessors, (204), 15 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-26 11:45:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1684 transitions. [2023-11-26 11:45:37,351 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1684 transitions. Word has length 466 [2023-11-26 11:45:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:37,352 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 1684 transitions. [2023-11-26 11:45:37,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:37,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1684 transitions. [2023-11-26 11:45:37,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2023-11-26 11:45:37,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:37,359 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:37,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:37,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:45:37,570 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:37,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:37,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1402248132, now seen corresponding path program 1 times [2023-11-26 11:45:37,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:37,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144693577] [2023-11-26 11:45:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:37,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:37,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:37,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462272240] [2023-11-26 11:45:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:37,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:37,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:37,655 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:37,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:45:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:38,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:45:38,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-26 11:45:39,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:39,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:39,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144693577] [2023-11-26 11:45:39,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:45:39,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462272240] [2023-11-26 11:45:39,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462272240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:39,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:39,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:39,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213659086] [2023-11-26 11:45:39,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:39,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:39,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:39,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:39,048 INFO L87 Difference]: Start difference. First operand 1078 states and 1684 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:39,466 INFO L93 Difference]: Finished difference Result 2778 states and 4370 transitions. [2023-11-26 11:45:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 466 [2023-11-26 11:45:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:39,479 INFO L225 Difference]: With dead ends: 2778 [2023-11-26 11:45:39,480 INFO L226 Difference]: Without dead ends: 1950 [2023-11-26 11:45:39,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:45:39,484 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 151 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:39,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 1428 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:45:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2023-11-26 11:45:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1908. [2023-11-26 11:45:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1542 states have (on average 1.4928664072632944) internal successors, (2302), 1542 states have internal predecessors, (2302), 340 states have call successors, (340), 25 states have call predecessors, (340), 25 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-11-26 11:45:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2982 transitions. [2023-11-26 11:45:39,809 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2982 transitions. Word has length 466 [2023-11-26 11:45:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:39,810 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2982 transitions. [2023-11-26 11:45:39,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-26 11:45:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2982 transitions. [2023-11-26 11:45:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-26 11:45:39,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:39,815 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:39,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:40,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:45:40,026 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:45:40,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:40,027 INFO L85 PathProgramCache]: Analyzing trace with hash -539948492, now seen corresponding path program 1 times [2023-11-26 11:45:40,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:40,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436294328] [2023-11-26 11:45:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:40,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:40,120 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:45:40,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045633545] [2023-11-26 11:45:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:40,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:40,122 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:40,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57f1086-1ee8-4d1f-a617-ab13a9441558/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:45:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:40,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:45:40,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4342 proven. 192 refuted. 0 times theorem prover too weak. 4578 trivial. 0 not checked. [2023-11-26 11:45:41,964 INFO L327 TraceCheckSpWp]: Computing backward predicates...