./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl --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 95cc1fdf7bf3f74912cb16d8071af167d7f219f07d397ec04dae703052e9c103 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:14:20,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:14:20,530 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:14:20,540 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:14:20,540 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:14:20,581 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:14:20,582 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:14:20,585 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:14:20,586 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:14:20,593 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:14:20,594 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:14:20,595 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:14:20,595 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:14:20,597 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:14:20,597 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:14:20,598 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:14:20,598 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:14:20,599 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:14:20,599 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:14:20,599 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:14:20,600 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:14:20,600 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:14:20,601 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:14:20,601 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:14:20,602 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:14:20,602 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:14:20,603 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:14:20,603 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:14:20,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:20,604 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:14:20,605 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:14:20,605 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:14:20,606 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:14:20,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:14:20,606 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:14:20,606 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:14:20,606 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:14:20,607 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:14:20,607 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:14:20,607 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_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95cc1fdf7bf3f74912cb16d8071af167d7f219f07d397ec04dae703052e9c103 [2023-11-12 02:14:20,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:14:21,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:14:21,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:14:21,006 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:14:21,007 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:14:21,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-3.i [2023-11-12 02:14:24,092 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:14:24,538 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:14:24,541 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-3.i [2023-11-12 02:14:24,567 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/data/22ae0e443/26d8c716bfb34e4091315f33932fdbaf/FLAG092c3b900 [2023-11-12 02:14:24,584 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/data/22ae0e443/26d8c716bfb34e4091315f33932fdbaf [2023-11-12 02:14:24,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:14:24,593 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:14:24,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:24,595 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:14:24,600 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:14:24,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6419b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:24, skipping insertion in model container [2023-11-12 02:14:24,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:14:24" (1/1) ... [2023-11-12 02:14:24,701 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:14:24,848 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_af73f738-dc39-4aef-b05e-6adeef8faeeb/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-3.i[915,928] [2023-11-12 02:14:25,154 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:25,172 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:14:25,197 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_af73f738-dc39-4aef-b05e-6adeef8faeeb/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-3.i[915,928] [2023-11-12 02:14:25,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:14:25,369 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:14:25,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25 WrapperNode [2023-11-12 02:14:25,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:14:25,371 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:25,372 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:14:25,372 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:14:25,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,422 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,555 INFO L138 Inliner]: procedures = 26, calls = 85, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 747 [2023-11-12 02:14:25,556 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:14:25,557 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:14:25,557 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:14:25,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:14:25,568 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,589 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,589 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,641 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,655 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,690 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:14:25,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:14:25,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:14:25,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:14:25,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (1/1) ... [2023-11-12 02:14:25,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:14:25,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:25,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:14:25,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:14:25,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:14:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:14:25,791 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:14:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:14:25,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:14:25,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:14:25,987 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:14:25,989 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:14:27,441 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:14:27,465 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:14:27,465 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:14:27,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:27 BoogieIcfgContainer [2023-11-12 02:14:27,469 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:14:27,474 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:14:27,474 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:14:27,478 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:14:27,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:14:24" (1/3) ... [2023-11-12 02:14:27,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122a9058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:27, skipping insertion in model container [2023-11-12 02:14:27,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:14:25" (2/3) ... [2023-11-12 02:14:27,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122a9058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:14:27, skipping insertion in model container [2023-11-12 02:14:27,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:14:27" (3/3) ... [2023-11-12 02:14:27,483 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-3.i [2023-11-12 02:14:27,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:14:27,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:14:27,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:14:27,593 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;@342752c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:14:27,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:14:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 285 states, 210 states have (on average 1.6095238095238096) internal successors, (338), 211 states have internal predecessors, (338), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-12 02:14:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-11-12 02:14:27,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:27,641 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:27,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:27,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:27,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1995107021, now seen corresponding path program 1 times [2023-11-12 02:14:27,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:27,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188670101] [2023-11-12 02:14:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:27,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:28,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:28,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188670101] [2023-11-12 02:14:28,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:14:28,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623969290] [2023-11-12 02:14:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:28,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:28,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:28,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:28,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:14:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:28,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:14:28,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2023-11-12 02:14:28,699 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:28,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623969290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:28,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:28,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:14:28,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064353816] [2023-11-12 02:14:28,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:28,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:14:28,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:14:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:14:28,762 INFO L87 Difference]: Start difference. First operand has 285 states, 210 states have (on average 1.6095238095238096) internal successors, (338), 211 states have internal predecessors, (338), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 2 states, 2 states have (on average 62.0) internal successors, (124), 2 states have internal predecessors, (124), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-12 02:14:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:28,832 INFO L93 Difference]: Finished difference Result 563 states and 1030 transitions. [2023-11-12 02:14:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:14:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 62.0) internal successors, (124), 2 states have internal predecessors, (124), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) Word has length 479 [2023-11-12 02:14:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:28,851 INFO L225 Difference]: With dead ends: 563 [2023-11-12 02:14:28,855 INFO L226 Difference]: Without dead ends: 281 [2023-11-12 02:14:28,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:14:28,873 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:28,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:28,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-11-12 02:14:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2023-11-12 02:14:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 207 states have (on average 1.5942028985507246) internal successors, (330), 207 states have internal predecessors, (330), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-12 02:14:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 474 transitions. [2023-11-12 02:14:28,982 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 474 transitions. Word has length 479 [2023-11-12 02:14:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:28,983 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 474 transitions. [2023-11-12 02:14:28,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 62.0) internal successors, (124), 2 states have internal predecessors, (124), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-12 02:14:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 474 transitions. [2023-11-12 02:14:28,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-11-12 02:14:28,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:28,999 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:29,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:29,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:14:29,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:29,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:29,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1609606111, now seen corresponding path program 1 times [2023-11-12 02:14:29,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:29,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191428996] [2023-11-12 02:14:29,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:29,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:29,396 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:29,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240183330] [2023-11-12 02:14:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:29,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:29,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:29,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:29,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:14:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:29,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:14:29,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 828 proven. 0 refuted. 0 times theorem prover too weak. 9396 trivial. 0 not checked. [2023-11-12 02:14:30,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:30,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:30,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191428996] [2023-11-12 02:14:30,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:30,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240183330] [2023-11-12 02:14:30,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240183330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:30,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:30,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:14:30,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128867649] [2023-11-12 02:14:30,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:30,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:30,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:30,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:30,617 INFO L87 Difference]: Start difference. First operand 281 states and 474 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 2 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-12 02:14:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:30,811 INFO L93 Difference]: Finished difference Result 559 states and 945 transitions. [2023-11-12 02:14:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:30,812 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), 2 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) Word has length 479 [2023-11-12 02:14:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:30,818 INFO L225 Difference]: With dead ends: 559 [2023-11-12 02:14:30,818 INFO L226 Difference]: Without dead ends: 281 [2023-11-12 02:14:30,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:30,820 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 271 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:30,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 427 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-11-12 02:14:30,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2023-11-12 02:14:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 207 states have (on average 1.5845410628019323) internal successors, (328), 207 states have internal predecessors, (328), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-12 02:14:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 472 transitions. [2023-11-12 02:14:30,852 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 472 transitions. Word has length 479 [2023-11-12 02:14:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:30,855 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 472 transitions. [2023-11-12 02:14:30,856 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), 2 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-12 02:14:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 472 transitions. [2023-11-12 02:14:30,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-12 02:14:30,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:30,866 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:30,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:31,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 02:14:31,075 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:31,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1531779962, now seen corresponding path program 1 times [2023-11-12 02:14:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:31,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768733019] [2023-11-12 02:14:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:31,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:31,197 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:31,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661691714] [2023-11-12 02:14:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:31,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:31,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:31,205 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:31,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:14:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:31,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:14:31,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-12 02:14:31,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:31,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:31,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768733019] [2023-11-12 02:14:31,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:31,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661691714] [2023-11-12 02:14:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661691714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:31,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:31,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:31,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907178339] [2023-11-12 02:14:31,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:31,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:31,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:31,759 INFO L87 Difference]: Start difference. First operand 281 states and 472 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:32,056 INFO L93 Difference]: Finished difference Result 718 states and 1212 transitions. [2023-11-12 02:14:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:32,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 480 [2023-11-12 02:14:32,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:32,066 INFO L225 Difference]: With dead ends: 718 [2023-11-12 02:14:32,067 INFO L226 Difference]: Without dead ends: 440 [2023-11-12 02:14:32,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:32,071 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 469 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:32,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1427 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-11-12 02:14:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 437. [2023-11-12 02:14:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 355 states have (on average 1.6366197183098592) internal successors, (581), 356 states have internal predecessors, (581), 79 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-12 02:14:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 739 transitions. [2023-11-12 02:14:32,131 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 739 transitions. Word has length 480 [2023-11-12 02:14:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:32,137 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 739 transitions. [2023-11-12 02:14:32,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 739 transitions. [2023-11-12 02:14:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-12 02:14:32,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:32,148 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:32,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:32,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:32,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:32,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:32,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2031219908, now seen corresponding path program 1 times [2023-11-12 02:14:32,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:32,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407945193] [2023-11-12 02:14:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:32,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:32,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:32,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709326591] [2023-11-12 02:14:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:32,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:32,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:32,505 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:32,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:14:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:32,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:32,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2780 proven. 0 refuted. 0 times theorem prover too weak. 7444 trivial. 0 not checked. [2023-11-12 02:14:34,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:34,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:34,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407945193] [2023-11-12 02:14:34,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:34,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709326591] [2023-11-12 02:14:34,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709326591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:34,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:34,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:14:34,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651070653] [2023-11-12 02:14:34,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:34,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:34,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:34,428 INFO L87 Difference]: Start difference. First operand 437 states and 739 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 3 states have call successors, (72), 3 states have call predecessors, (72), 3 states have return successors, (72), 3 states have call predecessors, (72), 3 states have call successors, (72) [2023-11-12 02:14:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:34,977 INFO L93 Difference]: Finished difference Result 872 states and 1477 transitions. [2023-11-12 02:14:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:34,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 3 states have call successors, (72), 3 states have call predecessors, (72), 3 states have return successors, (72), 3 states have call predecessors, (72), 3 states have call successors, (72) Word has length 480 [2023-11-12 02:14:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:35,001 INFO L225 Difference]: With dead ends: 872 [2023-11-12 02:14:35,001 INFO L226 Difference]: Without dead ends: 438 [2023-11-12 02:14:35,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:35,007 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 555 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:35,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 671 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:14:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2023-11-12 02:14:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2023-11-12 02:14:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 356 states have (on average 1.6348314606741574) internal successors, (582), 357 states have internal predecessors, (582), 79 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-12 02:14:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 740 transitions. [2023-11-12 02:14:35,054 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 740 transitions. Word has length 480 [2023-11-12 02:14:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:35,056 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 740 transitions. [2023-11-12 02:14:35,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 3 states have call successors, (72), 3 states have call predecessors, (72), 3 states have return successors, (72), 3 states have call predecessors, (72), 3 states have call successors, (72) [2023-11-12 02:14:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 740 transitions. [2023-11-12 02:14:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-12 02:14:35,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:35,062 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:35,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:35,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:35,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:35,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:35,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1387728382, now seen corresponding path program 1 times [2023-11-12 02:14:35,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:35,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757439672] [2023-11-12 02:14:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:35,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:35,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:35,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036356284] [2023-11-12 02:14:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:35,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:35,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:35,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:35,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:14:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:35,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:14:35,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-12 02:14:35,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:35,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:35,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757439672] [2023-11-12 02:14:35,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:35,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036356284] [2023-11-12 02:14:35,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036356284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:35,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:35,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:14:35,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116353013] [2023-11-12 02:14:35,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:35,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:35,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:35,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:35,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:35,940 INFO L87 Difference]: Start difference. First operand 438 states and 740 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:36,021 INFO L93 Difference]: Finished difference Result 1166 states and 1985 transitions. [2023-11-12 02:14:36,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:36,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 480 [2023-11-12 02:14:36,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:36,030 INFO L225 Difference]: With dead ends: 1166 [2023-11-12 02:14:36,030 INFO L226 Difference]: Without dead ends: 731 [2023-11-12 02:14:36,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:36,033 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 268 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:36,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1175 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:14:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2023-11-12 02:14:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 441. [2023-11-12 02:14:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 359 states have (on average 1.6323119777158774) internal successors, (586), 360 states have internal predecessors, (586), 79 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-12 02:14:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 744 transitions. [2023-11-12 02:14:36,075 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 744 transitions. Word has length 480 [2023-11-12 02:14:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:36,076 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 744 transitions. [2023-11-12 02:14:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 744 transitions. [2023-11-12 02:14:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-12 02:14:36,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:36,082 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:36,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:36,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:36,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:36,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:36,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1310827584, now seen corresponding path program 1 times [2023-11-12 02:14:36,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:36,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903373848] [2023-11-12 02:14:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:36,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:36,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:36,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310511990] [2023-11-12 02:14:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:36,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:36,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:36,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:36,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:14:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:36,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:14:36,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-12 02:14:38,622 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:38,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903373848] [2023-11-12 02:14:38,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310511990] [2023-11-12 02:14:38,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310511990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:38,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:38,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:38,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10087987] [2023-11-12 02:14:38,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:38,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:38,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:38,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:38,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:38,627 INFO L87 Difference]: Start difference. First operand 441 states and 744 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:39,563 INFO L93 Difference]: Finished difference Result 1744 states and 2947 transitions. [2023-11-12 02:14:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:39,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 480 [2023-11-12 02:14:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:39,575 INFO L225 Difference]: With dead ends: 1744 [2023-11-12 02:14:39,579 INFO L226 Difference]: Without dead ends: 1306 [2023-11-12 02:14:39,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:39,582 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 943 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:39,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 1524 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:14:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2023-11-12 02:14:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1019. [2023-11-12 02:14:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 782 states have (on average 1.5895140664961638) internal successors, (1243), 784 states have internal predecessors, (1243), 230 states have call successors, (230), 6 states have call predecessors, (230), 6 states have return successors, (230), 228 states have call predecessors, (230), 230 states have call successors, (230) [2023-11-12 02:14:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1703 transitions. [2023-11-12 02:14:39,747 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1703 transitions. Word has length 480 [2023-11-12 02:14:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:39,748 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1703 transitions. [2023-11-12 02:14:39,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1703 transitions. [2023-11-12 02:14:39,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2023-11-12 02:14:39,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:39,754 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:39,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:39,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:39,963 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:39,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash -414354259, now seen corresponding path program 1 times [2023-11-12 02:14:39,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:39,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050861395] [2023-11-12 02:14:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:39,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:40,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:40,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526706913] [2023-11-12 02:14:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:40,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:40,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:40,096 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:40,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:14:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:40,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:14:40,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-12 02:14:40,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:40,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:40,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050861395] [2023-11-12 02:14:40,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:40,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526706913] [2023-11-12 02:14:40,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526706913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:40,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:40,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:14:40,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860728487] [2023-11-12 02:14:40,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:40,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:40,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:40,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:40,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:40,726 INFO L87 Difference]: Start difference. First operand 1019 states and 1703 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:40,880 INFO L93 Difference]: Finished difference Result 2759 states and 4639 transitions. [2023-11-12 02:14:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:40,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 481 [2023-11-12 02:14:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:40,897 INFO L225 Difference]: With dead ends: 2759 [2023-11-12 02:14:40,897 INFO L226 Difference]: Without dead ends: 1887 [2023-11-12 02:14:40,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:40,901 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 438 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:40,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1273 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2023-11-12 02:14:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1885. [2023-11-12 02:14:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1486 states have (on average 1.6036339165545088) internal successors, (2383), 1490 states have internal predecessors, (2383), 388 states have call successors, (388), 10 states have call predecessors, (388), 10 states have return successors, (388), 384 states have call predecessors, (388), 388 states have call successors, (388) [2023-11-12 02:14:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3159 transitions. [2023-11-12 02:14:41,204 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3159 transitions. Word has length 481 [2023-11-12 02:14:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:41,205 INFO L495 AbstractCegarLoop]: Abstraction has 1885 states and 3159 transitions. [2023-11-12 02:14:41,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:41,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3159 transitions. [2023-11-12 02:14:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2023-11-12 02:14:41,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:41,211 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:41,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:41,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:41,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:41,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1786161557, now seen corresponding path program 1 times [2023-11-12 02:14:41,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:41,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684829956] [2023-11-12 02:14:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:41,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:41,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:41,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157871145] [2023-11-12 02:14:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:41,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:41,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:41,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:41,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:14:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:42,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:42,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-12 02:14:43,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684829956] [2023-11-12 02:14:43,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157871145] [2023-11-12 02:14:43,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157871145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:43,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:43,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:14:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997046279] [2023-11-12 02:14:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:43,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:43,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:43,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:43,781 INFO L87 Difference]: Start difference. First operand 1885 states and 3159 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:44,023 INFO L93 Difference]: Finished difference Result 4371 states and 7323 transitions. [2023-11-12 02:14:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:44,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 481 [2023-11-12 02:14:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:44,051 INFO L225 Difference]: With dead ends: 4371 [2023-11-12 02:14:44,051 INFO L226 Difference]: Without dead ends: 2633 [2023-11-12 02:14:44,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:44,060 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 222 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:44,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1092 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2023-11-12 02:14:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2627. [2023-11-12 02:14:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2066 states have (on average 1.59486931268151) internal successors, (3295), 2072 states have internal predecessors, (3295), 546 states have call successors, (546), 14 states have call predecessors, (546), 14 states have return successors, (546), 540 states have call predecessors, (546), 546 states have call successors, (546) [2023-11-12 02:14:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 4387 transitions. [2023-11-12 02:14:44,426 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 4387 transitions. Word has length 481 [2023-11-12 02:14:44,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:44,427 INFO L495 AbstractCegarLoop]: Abstraction has 2627 states and 4387 transitions. [2023-11-12 02:14:44,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:44,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 4387 transitions. [2023-11-12 02:14:44,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-12 02:14:44,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:44,433 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:44,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:44,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:44,642 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:44,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:44,642 INFO L85 PathProgramCache]: Analyzing trace with hash -26555927, now seen corresponding path program 1 times [2023-11-12 02:14:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:44,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417979444] [2023-11-12 02:14:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:44,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:44,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7140919] [2023-11-12 02:14:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:44,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:44,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:44,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:44,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:14:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:45,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 1234 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:45,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-12 02:14:45,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:45,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:45,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417979444] [2023-11-12 02:14:45,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:45,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7140919] [2023-11-12 02:14:45,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7140919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:45,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:45,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:45,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914075985] [2023-11-12 02:14:45,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:45,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:45,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:45,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:45,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:45,342 INFO L87 Difference]: Start difference. First operand 2627 states and 4387 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:46,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:46,318 INFO L93 Difference]: Finished difference Result 6763 states and 11234 transitions. [2023-11-12 02:14:46,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:46,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 482 [2023-11-12 02:14:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:46,357 INFO L225 Difference]: With dead ends: 6763 [2023-11-12 02:14:46,357 INFO L226 Difference]: Without dead ends: 5025 [2023-11-12 02:14:46,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:46,365 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 923 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:46,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 1366 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:14:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2023-11-12 02:14:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 4269. [2023-11-12 02:14:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4269 states, 3317 states have (on average 1.5712993668977993) internal successors, (5212), 3333 states have internal predecessors, (5212), 924 states have call successors, (924), 27 states have call predecessors, (924), 27 states have return successors, (924), 908 states have call predecessors, (924), 924 states have call successors, (924) [2023-11-12 02:14:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4269 states to 4269 states and 7060 transitions. [2023-11-12 02:14:47,077 INFO L78 Accepts]: Start accepts. Automaton has 4269 states and 7060 transitions. Word has length 482 [2023-11-12 02:14:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:47,078 INFO L495 AbstractCegarLoop]: Abstraction has 4269 states and 7060 transitions. [2023-11-12 02:14:47,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4269 states and 7060 transitions. [2023-11-12 02:14:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-12 02:14:47,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:47,085 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:47,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:47,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:14:47,300 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:47,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:47,301 INFO L85 PathProgramCache]: Analyzing trace with hash 52093372, now seen corresponding path program 1 times [2023-11-12 02:14:47,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:47,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992963886] [2023-11-12 02:14:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:47,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:47,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:47,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773452329] [2023-11-12 02:14:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:47,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:47,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:47,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:47,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:14:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:48,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:48,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-12 02:14:48,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:48,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:48,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992963886] [2023-11-12 02:14:48,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:48,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773452329] [2023-11-12 02:14:48,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773452329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:48,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:48,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:14:48,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688201147] [2023-11-12 02:14:48,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:48,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:48,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:48,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:48,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:48,125 INFO L87 Difference]: Start difference. First operand 4269 states and 7060 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:49,333 INFO L93 Difference]: Finished difference Result 20048 states and 33116 transitions. [2023-11-12 02:14:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 482 [2023-11-12 02:14:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:49,452 INFO L225 Difference]: With dead ends: 20048 [2023-11-12 02:14:49,452 INFO L226 Difference]: Without dead ends: 15918 [2023-11-12 02:14:49,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:49,470 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 1438 mSDsluCounter, 1665 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 2138 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:49,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1438 Valid, 2138 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:14:49,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15918 states. [2023-11-12 02:14:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15918 to 10408. [2023-11-12 02:14:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10408 states, 8739 states have (on average 1.6224968531868635) internal successors, (14179), 8779 states have internal predecessors, (14179), 1616 states have call successors, (1616), 52 states have call predecessors, (1616), 52 states have return successors, (1616), 1576 states have call predecessors, (1616), 1616 states have call successors, (1616) [2023-11-12 02:14:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10408 states to 10408 states and 17411 transitions. [2023-11-12 02:14:50,674 INFO L78 Accepts]: Start accepts. Automaton has 10408 states and 17411 transitions. Word has length 482 [2023-11-12 02:14:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:50,675 INFO L495 AbstractCegarLoop]: Abstraction has 10408 states and 17411 transitions. [2023-11-12 02:14:50,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 10408 states and 17411 transitions. [2023-11-12 02:14:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-12 02:14:50,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:50,686 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:50,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:50,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:14:50,895 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:50,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2087364598, now seen corresponding path program 1 times [2023-11-12 02:14:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:50,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76049635] [2023-11-12 02:14:50,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:50,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:50,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:50,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224036311] [2023-11-12 02:14:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:50,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:50,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:50,976 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:50,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:14:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:51,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:14:51,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-12 02:14:51,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:51,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:51,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76049635] [2023-11-12 02:14:51,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:51,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224036311] [2023-11-12 02:14:51,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224036311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:51,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:51,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:14:51,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628183394] [2023-11-12 02:14:51,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:51,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:14:51,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:51,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:14:51,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:14:51,636 INFO L87 Difference]: Start difference. First operand 10408 states and 17411 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:53,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:53,233 INFO L93 Difference]: Finished difference Result 28688 states and 47791 transitions. [2023-11-12 02:14:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:14:53,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 482 [2023-11-12 02:14:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:53,308 INFO L225 Difference]: With dead ends: 28688 [2023-11-12 02:14:53,309 INFO L226 Difference]: Without dead ends: 18478 [2023-11-12 02:14:53,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:53,343 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1717 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:53,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 2737 Invalid, 449 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [215 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:14:53,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18478 states. [2023-11-12 02:14:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18478 to 10408. [2023-11-12 02:14:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10408 states, 8739 states have (on average 1.6188351069916467) internal successors, (14147), 8779 states have internal predecessors, (14147), 1616 states have call successors, (1616), 52 states have call predecessors, (1616), 52 states have return successors, (1616), 1576 states have call predecessors, (1616), 1616 states have call successors, (1616) [2023-11-12 02:14:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10408 states to 10408 states and 17379 transitions. [2023-11-12 02:14:54,590 INFO L78 Accepts]: Start accepts. Automaton has 10408 states and 17379 transitions. Word has length 482 [2023-11-12 02:14:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:54,591 INFO L495 AbstractCegarLoop]: Abstraction has 10408 states and 17379 transitions. [2023-11-12 02:14:54,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:14:54,592 INFO L276 IsEmpty]: Start isEmpty. Operand 10408 states and 17379 transitions. [2023-11-12 02:14:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-12 02:14:54,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:54,601 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:54,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:54,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:14:54,811 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:54,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:54,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1885540664, now seen corresponding path program 1 times [2023-11-12 02:14:54,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:54,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582490207] [2023-11-12 02:14:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:54,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:54,892 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:54,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701926854] [2023-11-12 02:14:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:54,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:54,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:54,894 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:54,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:14:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:55,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:55,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4127 proven. 57 refuted. 0 times theorem prover too weak. 6040 trivial. 0 not checked. [2023-11-12 02:14:55,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 156 proven. 57 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-12 02:14:56,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:56,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582490207] [2023-11-12 02:14:56,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:56,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701926854] [2023-11-12 02:14:56,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701926854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:56,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:56,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:14:56,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268863124] [2023-11-12 02:14:56,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:56,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:56,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:56,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:14:56,140 INFO L87 Difference]: Start difference. First operand 10408 states and 17379 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-12 02:14:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:57,363 INFO L93 Difference]: Finished difference Result 15768 states and 26289 transitions. [2023-11-12 02:14:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:14:57,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) Word has length 482 [2023-11-12 02:14:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:57,383 INFO L225 Difference]: With dead ends: 15768 [2023-11-12 02:14:57,383 INFO L226 Difference]: Without dead ends: 5529 [2023-11-12 02:14:57,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 956 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:14:57,410 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 673 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:57,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 1174 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:14:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2023-11-12 02:14:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 5475. [2023-11-12 02:14:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 4513 states have (on average 1.604919122534899) internal successors, (7243), 4529 states have internal predecessors, (7243), 924 states have call successors, (924), 37 states have call predecessors, (924), 37 states have return successors, (924), 908 states have call predecessors, (924), 924 states have call successors, (924) [2023-11-12 02:14:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 9091 transitions. [2023-11-12 02:14:58,137 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 9091 transitions. Word has length 482 [2023-11-12 02:14:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:58,138 INFO L495 AbstractCegarLoop]: Abstraction has 5475 states and 9091 transitions. [2023-11-12 02:14:58,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-12 02:14:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 9091 transitions. [2023-11-12 02:14:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2023-11-12 02:14:58,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:58,148 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:58,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:58,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:58,361 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:58,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:58,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2137133871, now seen corresponding path program 1 times [2023-11-12 02:14:58,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:58,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966526177] [2023-11-12 02:14:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:58,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:58,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:14:58,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458139785] [2023-11-12 02:14:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:58,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:58,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:58,453 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:58,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:14:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:59,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:14:59,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-12 02:14:59,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:59,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:59,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966526177] [2023-11-12 02:14:59,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:14:59,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458139785] [2023-11-12 02:14:59,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458139785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:59,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:59,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:14:59,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217893324] [2023-11-12 02:14:59,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:59,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:59,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:59,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:59,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:59,609 INFO L87 Difference]: Start difference. First operand 5475 states and 9091 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, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:15:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:00,784 INFO L93 Difference]: Finished difference Result 17597 states and 29196 transitions. [2023-11-12 02:15:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:15:00,786 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, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 483 [2023-11-12 02:15:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:00,831 INFO L225 Difference]: With dead ends: 17597 [2023-11-12 02:15:00,831 INFO L226 Difference]: Without dead ends: 12270 [2023-11-12 02:15:00,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:15:00,852 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 591 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:00,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 1502 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:15:00,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12270 states. [2023-11-12 02:15:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12270 to 10730. [2023-11-12 02:15:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10730 states, 8884 states have (on average 1.6062584421431787) internal successors, (14270), 8916 states have internal predecessors, (14270), 1776 states have call successors, (1776), 69 states have call predecessors, (1776), 69 states have return successors, (1776), 1744 states have call predecessors, (1776), 1776 states have call successors, (1776) [2023-11-12 02:15:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10730 states to 10730 states and 17822 transitions. [2023-11-12 02:15:02,473 INFO L78 Accepts]: Start accepts. Automaton has 10730 states and 17822 transitions. Word has length 483 [2023-11-12 02:15:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:02,476 INFO L495 AbstractCegarLoop]: Abstraction has 10730 states and 17822 transitions. [2023-11-12 02:15:02,476 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, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-12 02:15:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 10730 states and 17822 transitions. [2023-11-12 02:15:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2023-11-12 02:15:02,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:02,485 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:02,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:02,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:02,695 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:02,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:02,695 INFO L85 PathProgramCache]: Analyzing trace with hash -123357833, now seen corresponding path program 1 times [2023-11-12 02:15:02,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:02,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103731520] [2023-11-12 02:15:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:02,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:02,784 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:02,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069350472] [2023-11-12 02:15:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:02,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:02,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:02,786 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:02,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:15:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:15:03,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:15:03,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:15:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3701 proven. 48 refuted. 0 times theorem prover too weak. 6475 trivial. 0 not checked. [2023-11-12 02:15:03,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:15:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 165 proven. 48 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-12 02:15:04,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:15:04,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103731520] [2023-11-12 02:15:04,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:15:04,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069350472] [2023-11-12 02:15:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069350472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:15:04,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:15:04,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:15:04,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723985486] [2023-11-12 02:15:04,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:15:04,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:15:04,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:15:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:15:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:15:04,091 INFO L87 Difference]: Start difference. First operand 10730 states and 17822 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 2 states have call successors, (88), 2 states have call predecessors, (88), 4 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2023-11-12 02:15:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:15:05,272 INFO L93 Difference]: Finished difference Result 21480 states and 35562 transitions. [2023-11-12 02:15:05,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:15:05,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 2 states have call successors, (88), 2 states have call predecessors, (88), 4 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 484 [2023-11-12 02:15:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:15:05,305 INFO L225 Difference]: With dead ends: 21480 [2023-11-12 02:15:05,305 INFO L226 Difference]: Without dead ends: 10918 [2023-11-12 02:15:05,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 960 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:15:05,325 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 323 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:15:05,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1007 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:15:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10918 states. [2023-11-12 02:15:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10918 to 7610. [2023-11-12 02:15:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7610 states, 6411 states have (on average 1.6117610357198564) internal successors, (10333), 6435 states have internal predecessors, (10333), 1144 states have call successors, (1144), 54 states have call predecessors, (1144), 54 states have return successors, (1144), 1120 states have call predecessors, (1144), 1144 states have call successors, (1144) [2023-11-12 02:15:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7610 states to 7610 states and 12621 transitions. [2023-11-12 02:15:06,527 INFO L78 Accepts]: Start accepts. Automaton has 7610 states and 12621 transitions. Word has length 484 [2023-11-12 02:15:06,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:15:06,531 INFO L495 AbstractCegarLoop]: Abstraction has 7610 states and 12621 transitions. [2023-11-12 02:15:06,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 2 states have call successors, (88), 2 states have call predecessors, (88), 4 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2023-11-12 02:15:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7610 states and 12621 transitions. [2023-11-12 02:15:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2023-11-12 02:15:06,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:15:06,542 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:15:06,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:15:06,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:15:06,751 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:15:06,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:15:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash -632830923, now seen corresponding path program 1 times [2023-11-12 02:15:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:15:06,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563629054] [2023-11-12 02:15:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:06,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:15:06,830 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:15:06,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464869138] [2023-11-12 02:15:06,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:15:06,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:15:06,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:06,831 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:15:06,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af73f738-dc39-4aef-b05e-6adeef8faeeb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process