./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/nr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/nr5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya --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 7a05e17fa6f76d5004d5085f0b83441da7dbecb194f05c3b661e69c00b5f4df0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:37:31,682 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:37:31,750 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:37:31,754 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:37:31,755 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:37:31,783 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:37:31,783 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:37:31,784 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:37:31,785 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:37:31,785 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:37:31,786 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:37:31,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:37:31,787 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:37:31,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:37:31,789 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:37:31,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:37:31,790 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:37:31,790 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:37:31,791 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:37:31,791 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:37:31,792 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:37:31,793 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:37:31,793 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:37:31,794 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:37:31,794 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:37:31,794 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:37:31,795 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:37:31,795 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:37:31,796 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:37:31,796 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:37:31,797 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:37:31,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:37:31,797 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:37:31,798 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:37:31,798 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:37:31,798 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:37:31,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:37:31,798 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:37:31,799 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:37:31,799 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:37:31,799 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:37:31,799 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:37:31,800 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_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a05e17fa6f76d5004d5085f0b83441da7dbecb194f05c3b661e69c00b5f4df0 [2023-11-29 00:37:32,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:37:32,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:37:32,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:37:32,049 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:37:32,049 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:37:32,051 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-tiling/nr5.c [2023-11-29 00:37:34,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:37:35,024 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:37:35,025 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/sv-benchmarks/c/array-tiling/nr5.c [2023-11-29 00:37:35,033 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/data/13d16461d/dfa219165b0f4d8fbd485966199b488e/FLAG8b3a2aede [2023-11-29 00:37:35,047 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/data/13d16461d/dfa219165b0f4d8fbd485966199b488e [2023-11-29 00:37:35,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:37:35,052 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:37:35,053 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:37:35,053 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:37:35,058 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:37:35,059 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,060 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c2f31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35, skipping insertion in model container [2023-11-29 00:37:35,060 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,082 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:37:35,234 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_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/sv-benchmarks/c/array-tiling/nr5.c[394,407] [2023-11-29 00:37:35,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:37:35,262 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:37:35,275 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_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/sv-benchmarks/c/array-tiling/nr5.c[394,407] [2023-11-29 00:37:35,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:37:35,298 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:37:35,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35 WrapperNode [2023-11-29 00:37:35,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:37:35,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:37:35,300 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:37:35,300 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:37:35,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,335 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2023-11-29 00:37:35,336 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:37:35,336 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:37:35,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:37:35,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:37:35,348 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,350 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,364 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 6, 4]. 50 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-11-29 00:37:35,364 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,365 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,370 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,375 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,378 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:37:35,379 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:37:35,379 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:37:35,379 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:37:35,380 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (1/1) ... [2023-11-29 00:37:35,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:37:35,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:37:35,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:37:35,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:37:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:37:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:37:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:37:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:37:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:37:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:37:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:37:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:37:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:37:35,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:37:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:37:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:37:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:37:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:37:35,535 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:37:35,537 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:37:35,701 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:37:35,731 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:37:35,732 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 00:37:35,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:37:35 BoogieIcfgContainer [2023-11-29 00:37:35,732 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:37:35,735 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:37:35,735 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:37:35,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:37:35,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:37:35" (1/3) ... [2023-11-29 00:37:35,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30f6f071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:37:35, skipping insertion in model container [2023-11-29 00:37:35,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:37:35" (2/3) ... [2023-11-29 00:37:35,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30f6f071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:37:35, skipping insertion in model container [2023-11-29 00:37:35,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:37:35" (3/3) ... [2023-11-29 00:37:35,741 INFO L112 eAbstractionObserver]: Analyzing ICFG nr5.c [2023-11-29 00:37:35,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:37:35,761 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:37:35,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:37:35,818 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;@70991715, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:37:35,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:37:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:37:35,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:35,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:35,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:35,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:35,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2106680282, now seen corresponding path program 1 times [2023-11-29 00:37:35,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:35,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035125210] [2023-11-29 00:37:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:35,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:36,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:36,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035125210] [2023-11-29 00:37:36,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035125210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:37:36,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:37:36,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:37:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550341161] [2023-11-29 00:37:36,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:37:36,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:37:36,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:37:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:37:36,063 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:36,088 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2023-11-29 00:37:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:37:36,090 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 00:37:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:36,096 INFO L225 Difference]: With dead ends: 40 [2023-11-29 00:37:36,096 INFO L226 Difference]: Without dead ends: 18 [2023-11-29 00:37:36,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:37:36,102 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:36,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:37:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-29 00:37:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-29 00:37:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-29 00:37:36,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2023-11-29 00:37:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:36,129 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-29 00:37:36,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-29 00:37:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:37:36,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:36,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:36,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:37:36,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:36,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:36,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1426621912, now seen corresponding path program 1 times [2023-11-29 00:37:36,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:36,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857157762] [2023-11-29 00:37:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:36,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:36,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:36,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857157762] [2023-11-29 00:37:36,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857157762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:37:36,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:37:36,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:37:36,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625063984] [2023-11-29 00:37:36,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:37:36,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:37:36,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:36,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:37:36,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:37:36,310 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:36,348 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-29 00:37:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:37:36,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 00:37:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:36,350 INFO L225 Difference]: With dead ends: 23 [2023-11-29 00:37:36,350 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 00:37:36,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:37:36,352 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:36,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:37:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 00:37:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-11-29 00:37:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-29 00:37:36,357 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-11-29 00:37:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:36,358 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-29 00:37:36,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-29 00:37:36,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:37:36,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:36,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:36,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:37:36,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:36,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1426562330, now seen corresponding path program 1 times [2023-11-29 00:37:36,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:36,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518347397] [2023-11-29 00:37:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:36,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:36,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:36,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518347397] [2023-11-29 00:37:36,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518347397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:37:36,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:37:36,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:37:36,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290637595] [2023-11-29 00:37:36,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:37:36,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:37:36,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:36,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:37:36,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:37:36,610 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:36,651 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-11-29 00:37:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:37:36,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 00:37:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:36,652 INFO L225 Difference]: With dead ends: 35 [2023-11-29 00:37:36,652 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 00:37:36,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:37:36,654 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:36,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:37:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 00:37:36,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2023-11-29 00:37:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-29 00:37:36,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-11-29 00:37:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:36,662 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-29 00:37:36,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,662 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-29 00:37:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 00:37:36,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:36,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:36,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:37:36,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:36,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:36,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1008841274, now seen corresponding path program 1 times [2023-11-29 00:37:36,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:36,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818384969] [2023-11-29 00:37:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:36,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:36,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:36,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818384969] [2023-11-29 00:37:36,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818384969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:37:36,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:37:36,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:37:36,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248971116] [2023-11-29 00:37:36,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:37:36,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:37:36,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:36,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:37:36,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:37:36,712 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:36,735 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-11-29 00:37:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:37:36,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 00:37:36,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:36,737 INFO L225 Difference]: With dead ends: 39 [2023-11-29 00:37:36,737 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 00:37:36,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:37:36,739 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:36,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:37:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 00:37:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-29 00:37:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-29 00:37:36,751 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2023-11-29 00:37:36,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:36,751 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-29 00:37:36,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-29 00:37:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 00:37:36,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:36,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:36,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:37:36,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:36,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:36,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1963751443, now seen corresponding path program 1 times [2023-11-29 00:37:36,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:36,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336309921] [2023-11-29 00:37:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:36,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:36,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:36,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336309921] [2023-11-29 00:37:36,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336309921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:37:36,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384080628] [2023-11-29 00:37:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:36,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:36,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:37:36,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:37:36,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:37:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:36,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:37:36,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:36,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:37:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:36,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384080628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:37:36,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:37:36,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 00:37:36,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563844431] [2023-11-29 00:37:36,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:37:36,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:37:36,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:37:36,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:37:36,954 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:36,997 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2023-11-29 00:37:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:37:36,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 00:37:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:36,998 INFO L225 Difference]: With dead ends: 47 [2023-11-29 00:37:36,998 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 00:37:36,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:37:37,000 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:37,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:37:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 00:37:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-29 00:37:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-11-29 00:37:37,008 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2023-11-29 00:37:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:37,009 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-11-29 00:37:37,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-11-29 00:37:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 00:37:37,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:37,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:37,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:37:37,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:37,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:37,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:37,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1355307130, now seen corresponding path program 2 times [2023-11-29 00:37:37,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:37,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733787622] [2023-11-29 00:37:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:37,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:37,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:37,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733787622] [2023-11-29 00:37:37,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733787622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:37:37,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255432824] [2023-11-29 00:37:37,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:37:37,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:37:37,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:37:37,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:37:37,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:37:37,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:37:37,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:37:37,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:37,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:37:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:37,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255432824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:37:37,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:37:37,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-11-29 00:37:37,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619538779] [2023-11-29 00:37:37,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:37:37,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:37:37,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:37:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:37:37,502 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:37,552 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2023-11-29 00:37:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:37:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 00:37:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:37,553 INFO L225 Difference]: With dead ends: 59 [2023-11-29 00:37:37,553 INFO L226 Difference]: Without dead ends: 34 [2023-11-29 00:37:37,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:37:37,555 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:37,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:37:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-29 00:37:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-29 00:37:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-11-29 00:37:37,564 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 27 [2023-11-29 00:37:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:37,564 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-11-29 00:37:37,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-11-29 00:37:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 00:37:37,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:37,565 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:37,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:37:37,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:37:37,768 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:37,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:37,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1205847635, now seen corresponding path program 3 times [2023-11-29 00:37:37,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:37,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086449858] [2023-11-29 00:37:37,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:37,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:37,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:37,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086449858] [2023-11-29 00:37:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086449858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:37:37,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878259543] [2023-11-29 00:37:37,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:37:37,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:37,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:37:37,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:37:37,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:37:38,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:37:38,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:37:38,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:37:38,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 00:37:38,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:37:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 00:37:38,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878259543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:37:38,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:37:38,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2023-11-29 00:37:38,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093692756] [2023-11-29 00:37:38,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:37:38,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:37:38,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:37:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:37:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:37:38,142 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:37:38,265 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2023-11-29 00:37:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:37:38,266 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-29 00:37:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:37:38,267 INFO L225 Difference]: With dead ends: 67 [2023-11-29 00:37:38,267 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 00:37:38,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:37:38,269 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:37:38,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 30 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:37:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 00:37:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-11-29 00:37:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-29 00:37:38,278 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2023-11-29 00:37:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:37:38,278 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-29 00:37:38,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:37:38,279 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-29 00:37:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 00:37:38,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:37:38,280 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:37:38,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:37:38,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:38,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:37:38,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:37:38,481 INFO L85 PathProgramCache]: Analyzing trace with hash -504783057, now seen corresponding path program 1 times [2023-11-29 00:37:38,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:37:38,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794783766] [2023-11-29 00:37:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:38,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:37:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:39,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:37:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794783766] [2023-11-29 00:37:39,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794783766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:37:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499824063] [2023-11-29 00:37:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:37:39,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:37:39,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:37:39,459 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:37:39,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:37:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:37:39,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:37:39,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:37:39,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:37:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:39,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:37:39,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:39,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:37:40,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:37:40,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:37:40,076 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-29 00:37:40,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2023-11-29 00:37:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:37:40,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:38:50,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 93 [2023-11-29 00:38:50,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1131 treesize of output 1123 [2023-11-29 00:38:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:38:50,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499824063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:38:50,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:38:50,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 45 [2023-11-29 00:38:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082173383] [2023-11-29 00:38:50,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:38:50,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 00:38:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:38:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 00:38:50,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1658, Unknown=14, NotChecked=0, Total=1980 [2023-11-29 00:38:50,951 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 45 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 45 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:38:52,567 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2023-11-29 00:38:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 00:38:52,567 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 45 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-29 00:38:52,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:38:52,570 INFO L225 Difference]: With dead ends: 107 [2023-11-29 00:38:52,570 INFO L226 Difference]: Without dead ends: 98 [2023-11-29 00:38:52,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 71.2s TimeCoverageRelationStatistics Valid=970, Invalid=4566, Unknown=14, NotChecked=0, Total=5550 [2023-11-29 00:38:52,573 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 338 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:38:52,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 78 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:38:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-29 00:38:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2023-11-29 00:38:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-11-29 00:38:52,587 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 30 [2023-11-29 00:38:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:38:52,588 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-11-29 00:38:52,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 45 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:38:52,588 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-11-29 00:38:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 00:38:52,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:38:52,590 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:38:52,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:38:52,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:38:52,791 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:38:52,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:38:52,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1854707429, now seen corresponding path program 1 times [2023-11-29 00:38:52,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:38:52,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534344730] [2023-11-29 00:38:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:52,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:38:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:38:53,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:38:53,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534344730] [2023-11-29 00:38:53,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534344730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:38:53,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150077629] [2023-11-29 00:38:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:38:53,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:38:53,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:38:53,661 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:38:53,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:38:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:38:53,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 00:38:53,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:38:53,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:38:53,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:38:53,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:38:54,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:38:54,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:38:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:38:54,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:38:54,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 00:38:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:38:54,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:21,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2023-11-29 00:40:21,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47598 treesize of output 47086 [2023-11-29 00:40:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:25,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150077629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:25,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:40:25,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 16] total 41 [2023-11-29 00:40:25,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242697708] [2023-11-29 00:40:25,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:25,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 00:40:25,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:25,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 00:40:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1351, Unknown=23, NotChecked=0, Total=1640 [2023-11-29 00:40:25,812 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:27,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:40:27,057 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2023-11-29 00:40:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 00:40:27,057 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-29 00:40:27,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:40:27,059 INFO L225 Difference]: With dead ends: 119 [2023-11-29 00:40:27,059 INFO L226 Difference]: Without dead ends: 110 [2023-11-29 00:40:27,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 92.4s TimeCoverageRelationStatistics Valid=702, Invalid=3697, Unknown=23, NotChecked=0, Total=4422 [2023-11-29 00:40:27,061 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 217 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:40:27,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 123 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:40:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-29 00:40:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2023-11-29 00:40:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2023-11-29 00:40:27,077 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 35 [2023-11-29 00:40:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:40:27,078 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2023-11-29 00:40:27,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2023-11-29 00:40:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 00:40:27,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:40:27,079 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:27,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:40:27,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:27,280 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:40:27,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:27,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1068043601, now seen corresponding path program 2 times [2023-11-29 00:40:27,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:27,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936861708] [2023-11-29 00:40:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:27,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:28,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:28,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936861708] [2023-11-29 00:40:28,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936861708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:28,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956452775] [2023-11-29 00:40:28,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:40:28,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:28,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:28,022 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:28,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:40:28,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:40:28,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:28,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:40:28,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:28,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:40:28,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:28,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:40:28,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:40:28,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:40:28,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 00:40:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:28,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:48,516 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_156 Int) (v_ArrVal_153 Int) (|v_ULTIMATE.start_main_~j~0#1_62| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_62| 1)) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ (select (let ((.cse0 (* 20 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse0) v_ArrVal_153) (+ (* |v_ULTIMATE.start_main_~j~0#1_62| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0) v_ArrVal_156)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)) 1)))) is different from false [2023-11-29 00:41:08,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-11-29 00:41:08,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 358 treesize of output 350 [2023-11-29 00:41:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2023-11-29 00:41:08,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956452775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:41:08,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:41:08,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 16] total 45 [2023-11-29 00:41:08,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080861005] [2023-11-29 00:41:08,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:41:08,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 00:41:08,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:08,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 00:41:08,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1635, Unknown=9, NotChecked=84, Total=1980 [2023-11-29 00:41:08,464 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:10,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:10,389 INFO L93 Difference]: Finished difference Result 254 states and 294 transitions. [2023-11-29 00:42:10,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 00:42:10,389 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 00:42:10,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:10,390 INFO L225 Difference]: With dead ends: 254 [2023-11-29 00:42:10,390 INFO L226 Difference]: Without dead ends: 198 [2023-11-29 00:42:10,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 101.1s TimeCoverageRelationStatistics Valid=1184, Invalid=7360, Unknown=16, NotChecked=182, Total=8742 [2023-11-29 00:42:10,394 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 394 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:10,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 148 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 893 Invalid, 0 Unknown, 136 Unchecked, 0.9s Time] [2023-11-29 00:42:10,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-29 00:42:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2023-11-29 00:42:10,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1666666666666667) internal successors, (126), 108 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2023-11-29 00:42:10,417 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 40 [2023-11-29 00:42:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:10,417 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2023-11-29 00:42:10,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2023-11-29 00:42:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 00:42:10,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:10,419 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:10,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:42:10,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:42:10,620 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:10,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash 734938523, now seen corresponding path program 3 times [2023-11-29 00:42:10,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:10,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400990778] [2023-11-29 00:42:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:10,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:11,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:11,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400990778] [2023-11-29 00:42:11,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400990778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:11,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783801011] [2023-11-29 00:42:11,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:42:11,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:11,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:11,240 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:11,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:42:11,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 00:42:11,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:11,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:42:11,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:11,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2023-11-29 00:42:11,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2023-11-29 00:42:11,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-29 00:42:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 00:42:11,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:12,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-11-29 00:42:12,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:42:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 00:42:12,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783801011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:12,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:12,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2023-11-29 00:42:12,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754111125] [2023-11-29 00:42:12,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:12,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 00:42:12,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 00:42:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 00:42:12,348 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:13,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:42:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:15,550 INFO L93 Difference]: Finished difference Result 199 states and 225 transitions. [2023-11-29 00:42:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 00:42:15,551 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-29 00:42:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:15,552 INFO L225 Difference]: With dead ends: 199 [2023-11-29 00:42:15,552 INFO L226 Difference]: Without dead ends: 190 [2023-11-29 00:42:15,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=932, Invalid=4324, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 00:42:15,555 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 627 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 118 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:15,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 213 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 875 Invalid, 1 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 00:42:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-29 00:42:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 114. [2023-11-29 00:42:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2023-11-29 00:42:15,580 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 45 [2023-11-29 00:42:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:15,580 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2023-11-29 00:42:15,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2023-11-29 00:42:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 00:42:15,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:15,582 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:15,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 00:42:15,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:42:15,782 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:15,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash -757995985, now seen corresponding path program 4 times [2023-11-29 00:42:15,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:15,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950065326] [2023-11-29 00:42:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:15,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:16,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:16,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950065326] [2023-11-29 00:42:16,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950065326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:16,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303398549] [2023-11-29 00:42:16,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:42:16,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:16,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:16,303 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:16,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:42:16,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:42:16,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:16,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 00:42:16,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:16,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:42:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:16,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:16,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 00:42:16,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:42:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:17,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303398549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:17,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:17,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2023-11-29 00:42:17,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879297370] [2023-11-29 00:42:17,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:17,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 00:42:17,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:17,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 00:42:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:42:17,050 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:18,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:18,648 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2023-11-29 00:42:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 00:42:18,648 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-29 00:42:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:18,650 INFO L225 Difference]: With dead ends: 203 [2023-11-29 00:42:18,650 INFO L226 Difference]: Without dead ends: 201 [2023-11-29 00:42:18,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1025, Invalid=6115, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 00:42:18,654 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 190 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:18,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 185 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:42:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-29 00:42:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 129. [2023-11-29 00:42:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.1484375) internal successors, (147), 128 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2023-11-29 00:42:18,677 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 50 [2023-11-29 00:42:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:18,677 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2023-11-29 00:42:18,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 35 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2023-11-29 00:42:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 00:42:18,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:18,679 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:18,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:42:18,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:42:18,879 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:18,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:18,880 INFO L85 PathProgramCache]: Analyzing trace with hash 429883931, now seen corresponding path program 5 times [2023-11-29 00:42:18,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:18,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490770429] [2023-11-29 00:42:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:18,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:42:19,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:19,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490770429] [2023-11-29 00:42:19,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490770429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:19,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897360893] [2023-11-29 00:42:19,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:42:19,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:19,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:19,375 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:19,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:42:19,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 00:42:19,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:19,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:42:19,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:42:19,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:42:20,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897360893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:20,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:20,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2023-11-29 00:42:20,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525541588] [2023-11-29 00:42:20,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:20,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 00:42:20,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:20,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 00:42:20,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:42:20,211 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand has 33 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 33 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:42:20,440 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2023-11-29 00:42:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:42:20,440 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 33 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-29 00:42:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:42:20,441 INFO L225 Difference]: With dead ends: 142 [2023-11-29 00:42:20,441 INFO L226 Difference]: Without dead ends: 106 [2023-11-29 00:42:20,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:42:20,443 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 182 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:42:20,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 137 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:42:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-29 00:42:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-11-29 00:42:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.161904761904762) internal successors, (122), 105 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:20,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2023-11-29 00:42:20,471 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 55 [2023-11-29 00:42:20,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:42:20,471 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2023-11-29 00:42:20,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 33 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2023-11-29 00:42:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 00:42:20,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:42:20,472 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:20,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:42:20,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:42:20,673 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:42:20,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:20,673 INFO L85 PathProgramCache]: Analyzing trace with hash -667114568, now seen corresponding path program 6 times [2023-11-29 00:42:20,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:20,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465808779] [2023-11-29 00:42:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:20,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 22 proven. 183 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:21,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:21,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465808779] [2023-11-29 00:42:21,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465808779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:21,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960265187] [2023-11-29 00:42:21,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:42:21,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:21,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:21,602 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:21,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:42:21,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 00:42:21,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:21,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 00:42:21,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:21,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:42:21,938 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-29 00:42:21,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-29 00:42:21,989 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-29 00:42:21,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-29 00:42:22,016 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2023-11-29 00:42:22,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2023-11-29 00:42:22,122 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2023-11-29 00:42:22,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 29 [2023-11-29 00:42:22,210 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2023-11-29 00:42:22,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 29 [2023-11-29 00:42:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 13 proven. 178 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 00:42:22,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:43:01,860 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_289 Int) (|v_ULTIMATE.start_main_~j~0#1_102| Int) (v_ArrVal_285 Int) (|v_ULTIMATE.start_main_~j~0#1_103| Int) (v_ArrVal_284 Int) (v_ArrVal_281 Int) (|v_ULTIMATE.start_main_~j~0#1_99| Int)) (or (< 1 |v_ULTIMATE.start_main_~j~0#1_99|) (< (+ |v_ULTIMATE.start_main_~j~0#1_99| 2) |v_ULTIMATE.start_main_~j~0#1_102|) (= (select (let ((.cse0 (* 20 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse0) v_ArrVal_281) (+ (* |v_ULTIMATE.start_main_~j~0#1_103| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0) v_ArrVal_284) (+ (* |v_ULTIMATE.start_main_~j~0#1_102| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0) v_ArrVal_285) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_99| (- 4)) .cse0) v_ArrVal_289)) (+ 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) 0) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_103| 1)))) is different from false [2023-11-29 00:43:06,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 00:43:06,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:43:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 2 proven. 167 refuted. 2 times theorem prover too weak. 15 trivial. 20 not checked. [2023-11-29 00:43:06,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960265187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:43:06,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:43:06,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 25] total 54 [2023-11-29 00:43:06,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586221420] [2023-11-29 00:43:06,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:43:06,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 00:43:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:06,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 00:43:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2332, Unknown=7, NotChecked=102, Total=2862 [2023-11-29 00:43:06,241 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 54 states, 54 states have (on average 2.8333333333333335) internal successors, (153), 54 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:43:08,223 INFO L93 Difference]: Finished difference Result 255 states and 295 transitions. [2023-11-29 00:43:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 00:43:08,224 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.8333333333333335) internal successors, (153), 54 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-29 00:43:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:43:08,225 INFO L225 Difference]: With dead ends: 255 [2023-11-29 00:43:08,225 INFO L226 Difference]: Without dead ends: 166 [2023-11-29 00:43:08,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 110 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=1498, Invalid=8005, Unknown=7, NotChecked=192, Total=9702 [2023-11-29 00:43:08,229 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 306 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:43:08,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 189 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1379 Invalid, 0 Unknown, 134 Unchecked, 0.9s Time] [2023-11-29 00:43:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-29 00:43:08,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 105. [2023-11-29 00:43:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 104 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2023-11-29 00:43:08,249 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 68 [2023-11-29 00:43:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:43:08,249 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2023-11-29 00:43:08,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.8333333333333335) internal successors, (153), 54 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2023-11-29 00:43:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 00:43:08,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:43:08,250 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 6, 6, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:08,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:43:08,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:08,451 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:43:08,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:08,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1412092466, now seen corresponding path program 7 times [2023-11-29 00:43:08,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:08,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711759819] [2023-11-29 00:43:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:08,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 3 proven. 192 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:43:09,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:09,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711759819] [2023-11-29 00:43:09,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711759819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:09,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446649947] [2023-11-29 00:43:09,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:43:09,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:09,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:09,504 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:09,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:43:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:09,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:43:09,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:09,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:43:09,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:43:09,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:43:09,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:43:09,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:43:09,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:43:09,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:43:10,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:43:10,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:43:10,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 00:43:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 25 proven. 170 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:43:10,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:43:43,226 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_118| Int)) (or (forall ((v_ArrVal_343 Int) (v_ArrVal_341 Int) (|v_ULTIMATE.start_main_~j~0#1_117| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_118| (+ |v_ULTIMATE.start_main_~j~0#1_117| 1)) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ (select (let ((.cse0 (* 20 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |v_ULTIMATE.start_main_~j~0#1_118| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0) v_ArrVal_341) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (* |v_ULTIMATE.start_main_~j~0#1_117| (- 4))) v_ArrVal_343)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 1)))) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_118| 1)))) is different from false [2023-11-29 00:44:52,412 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_120| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_120| 1)) (forall ((v_ArrVal_343 Int) (v_ArrVal_341 Int) (|v_ULTIMATE.start_main_~j~0#1_117| Int) (|v_ULTIMATE.start_main_~j~0#1_119| Int) (|v_ULTIMATE.start_main_~j~0#1_118| Int) (v_ArrVal_339 Int) (v_ArrVal_338 Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_118| (+ |v_ULTIMATE.start_main_~j~0#1_117| 1)) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ (select (let ((.cse0 (* 20 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |v_ULTIMATE.start_main_~j~0#1_120| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0) v_ArrVal_338) (+ (* |v_ULTIMATE.start_main_~j~0#1_119| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0) v_ArrVal_339) (+ (* |v_ULTIMATE.start_main_~j~0#1_118| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0) v_ArrVal_341) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (* |v_ULTIMATE.start_main_~j~0#1_117| (- 4))) v_ArrVal_343)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 1)) (< |v_ULTIMATE.start_main_~j~0#1_120| (+ |v_ULTIMATE.start_main_~j~0#1_119| 1)) (< |v_ULTIMATE.start_main_~j~0#1_119| (+ |v_ULTIMATE.start_main_~j~0#1_118| 1)))))) is different from false [2023-11-29 00:44:52,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2023-11-29 00:44:52,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94702 treesize of output 94190 [2023-11-29 00:44:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 15 proven. 161 refuted. 2 times theorem prover too weak. 35 trivial. 17 not checked. [2023-11-29 00:44:52,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446649947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:52,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:52,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 22] total 58 [2023-11-29 00:44:52,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103499539] [2023-11-29 00:44:52,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:52,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 00:44:52,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:52,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 00:44:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2723, Unknown=24, NotChecked=218, Total=3306 [2023-11-29 00:44:52,972 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 58 states, 58 states have (on average 3.086206896551724) internal successors, (179), 58 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:44:56,170 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2023-11-29 00:44:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 00:44:56,171 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.086206896551724) internal successors, (179), 58 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-29 00:44:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:44:56,173 INFO L225 Difference]: With dead ends: 256 [2023-11-29 00:44:56,173 INFO L226 Difference]: Without dead ends: 247 [2023-11-29 00:44:56,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 114 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 104.4s TimeCoverageRelationStatistics Valid=1326, Invalid=8558, Unknown=24, NotChecked=394, Total=10302 [2023-11-29 00:44:56,177 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 328 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:44:56,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 329 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1887 Invalid, 0 Unknown, 283 Unchecked, 1.2s Time] [2023-11-29 00:44:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-29 00:44:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 187. [2023-11-29 00:44:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.1451612903225807) internal successors, (213), 186 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 213 transitions. [2023-11-29 00:44:56,219 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 213 transitions. Word has length 73 [2023-11-29 00:44:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:44:56,219 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 213 transitions. [2023-11-29 00:44:56,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.086206896551724) internal successors, (179), 58 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:56,220 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 213 transitions. [2023-11-29 00:44:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-29 00:44:56,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:44:56,220 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:56,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:44:56,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:44:56,421 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:44:56,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:56,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1813553144, now seen corresponding path program 8 times [2023-11-29 00:44:56,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:56,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226062740] [2023-11-29 00:44:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:56,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 74 proven. 175 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:44:57,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:57,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226062740] [2023-11-29 00:44:57,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226062740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:57,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092077745] [2023-11-29 00:44:57,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:44:57,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:57,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:57,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:57,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:44:57,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:44:57,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:44:57,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 00:44:57,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:58,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:44:58,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:44:58,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:44:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:44:58,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:44:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:44:58,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:44:58,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 00:44:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 19 proven. 205 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:44:58,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:46:49,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2023-11-29 00:46:49,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5934 treesize of output 5870 [2023-11-29 00:46:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 16 proven. 207 refuted. 1 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:46:49,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092077745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:46:49,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:46:49,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 22] total 62 [2023-11-29 00:46:49,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158720441] [2023-11-29 00:46:49,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:46:49,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 00:46:49,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 00:46:49,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=3406, Unknown=24, NotChecked=0, Total=3782 [2023-11-29 00:46:49,631 INFO L87 Difference]: Start difference. First operand 187 states and 213 transitions. Second operand has 62 states, 62 states have (on average 3.193548387096774) internal successors, (198), 62 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:56,475 INFO L93 Difference]: Finished difference Result 430 states and 484 transitions. [2023-11-29 00:46:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-29 00:46:56,475 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.193548387096774) internal successors, (198), 62 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2023-11-29 00:46:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:56,478 INFO L225 Difference]: With dead ends: 430 [2023-11-29 00:46:56,478 INFO L226 Difference]: Without dead ends: 416 [2023-11-29 00:46:56,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6632 ImplicationChecksByTransitivity, 115.7s TimeCoverageRelationStatistics Valid=2255, Invalid=18891, Unknown=24, NotChecked=0, Total=21170 [2023-11-29 00:46:56,481 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 740 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:56,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 467 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 00:46:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-29 00:46:56,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 199. [2023-11-29 00:46:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.1363636363636365) internal successors, (225), 198 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 225 transitions. [2023-11-29 00:46:56,539 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 225 transitions. Word has length 78 [2023-11-29 00:46:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:56,539 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 225 transitions. [2023-11-29 00:46:56,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.193548387096774) internal successors, (198), 62 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 225 transitions. [2023-11-29 00:46:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-29 00:46:56,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:56,540 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 7, 7, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:46:56,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:46:56,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:46:56,741 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:46:56,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash -17350284, now seen corresponding path program 9 times [2023-11-29 00:46:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:56,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714077969] [2023-11-29 00:46:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 14 proven. 244 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:46:57,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:57,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714077969] [2023-11-29 00:46:57,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714077969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:46:57,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366648638] [2023-11-29 00:46:57,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:46:57,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:46:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:46:57,578 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:46:57,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:46:57,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 00:46:57,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:46:57,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 00:46:57,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:46:57,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2023-11-29 00:46:57,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2023-11-29 00:46:58,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2023-11-29 00:46:58,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-29 00:46:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 30 proven. 221 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 00:46:58,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:46:59,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-11-29 00:46:59,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:46:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 14 proven. 237 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 00:46:59,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366648638] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:46:59,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:46:59,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 57 [2023-11-29 00:46:59,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486296773] [2023-11-29 00:46:59,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:46:59,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 00:46:59,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:59,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 00:46:59,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2800, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 00:46:59,423 INFO L87 Difference]: Start difference. First operand 199 states and 225 transitions. Second operand has 57 states, 57 states have (on average 3.473684210526316) internal successors, (198), 57 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:01,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:47:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:10,586 INFO L93 Difference]: Finished difference Result 396 states and 436 transitions. [2023-11-29 00:47:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 00:47:10,587 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.473684210526316) internal successors, (198), 57 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-11-29 00:47:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:10,589 INFO L225 Difference]: With dead ends: 396 [2023-11-29 00:47:10,589 INFO L226 Difference]: Without dead ends: 387 [2023-11-29 00:47:10,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6501 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2755, Invalid=19593, Unknown=2, NotChecked=0, Total=22350 [2023-11-29 00:47:10,592 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 941 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 292 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:10,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 542 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 2605 Invalid, 3 Unknown, 0 Unchecked, 4.9s Time] [2023-11-29 00:47:10,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-29 00:47:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 204. [2023-11-29 00:47:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1330049261083743) internal successors, (230), 203 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 230 transitions. [2023-11-29 00:47:10,647 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 230 transitions. Word has length 83 [2023-11-29 00:47:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:10,647 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 230 transitions. [2023-11-29 00:47:10,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.473684210526316) internal successors, (198), 57 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 230 transitions. [2023-11-29 00:47:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 00:47:10,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:10,648 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:10,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 00:47:10,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:47:10,849 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:47:10,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:10,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2069457398, now seen corresponding path program 10 times [2023-11-29 00:47:10,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:10,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659046646] [2023-11-29 00:47:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:10,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:47:11,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:11,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659046646] [2023-11-29 00:47:11,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659046646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:11,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126917080] [2023-11-29 00:47:11,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:47:11,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:11,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:11,793 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:11,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:47:11,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:47:11,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:11,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 00:47:11,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:12,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:47:12,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:47:12,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:47:12,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 00:47:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 281 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:47:12,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:13,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2023-11-29 00:47:13,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 166 [2023-11-29 00:47:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 281 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:47:13,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126917080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:13,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:13,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 60 [2023-11-29 00:47:13,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351443758] [2023-11-29 00:47:13,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:13,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 00:47:13,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 00:47:13,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=3250, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 00:47:13,902 INFO L87 Difference]: Start difference. First operand 204 states and 230 transitions. Second operand has 60 states, 60 states have (on average 3.683333333333333) internal successors, (221), 60 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:22,231 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 32 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (or (= 2 |c_ULTIMATE.start_main_~i~0#1|) (not (= |c_ULTIMATE.start_main_~j~0#1| 2))) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (= 2 (select .cse0 .cse1)) (<= |c_ULTIMATE.start_main_~j~0#1| 2) (not (= (+ |c_ULTIMATE.start_main_~j~0#1| 8) (* 5 |c_ULTIMATE.start_main_~i~0#1|))) (forall ((|v_ULTIMATE.start_main_~j~0#1_167| Int)) (or (forall ((v_ArrVal_493 Int)) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ (select (store .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_167| (- 4)) (* 20 |c_ULTIMATE.start_main_~i~0#1|)) v_ArrVal_493) .cse1) 1))) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_167| 1)))) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (<= 2 (select .cse0 32)))) is different from false [2023-11-29 00:47:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:27,976 INFO L93 Difference]: Finished difference Result 706 states and 784 transitions. [2023-11-29 00:47:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 00:47:27,977 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.683333333333333) internal successors, (221), 60 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-11-29 00:47:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:27,979 INFO L225 Difference]: With dead ends: 706 [2023-11-29 00:47:27,980 INFO L226 Difference]: Without dead ends: 537 [2023-11-29 00:47:27,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6654 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=2209, Invalid=21049, Unknown=2, NotChecked=302, Total=23562 [2023-11-29 00:47:27,982 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1129 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 3645 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 4196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 3645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:27,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 711 Invalid, 4196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 3645 Invalid, 0 Unknown, 174 Unchecked, 2.8s Time] [2023-11-29 00:47:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-29 00:47:28,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 293. [2023-11-29 00:47:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1369863013698631) internal successors, (332), 292 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2023-11-29 00:47:28,079 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 88 [2023-11-29 00:47:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:28,079 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2023-11-29 00:47:28,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.683333333333333) internal successors, (221), 60 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2023-11-29 00:47:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 00:47:28,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:28,081 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:28,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 00:47:28,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:47:28,281 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:47:28,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:28,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1947843916, now seen corresponding path program 11 times [2023-11-29 00:47:28,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:28,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751336195] [2023-11-29 00:47:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:28,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 12 proven. 329 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:47:28,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751336195] [2023-11-29 00:47:28,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751336195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211272987] [2023-11-29 00:47:28,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:47:28,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:28,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:28,976 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:28,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:47:29,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-29 00:47:29,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:29,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 00:47:29,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:29,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:47:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:47:30,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:30,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 00:47:30,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:47:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:47:30,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211272987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:30,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:30,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 53 [2023-11-29 00:47:30,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592846101] [2023-11-29 00:47:30,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:30,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 00:47:30,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:30,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 00:47:30,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2533, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 00:47:30,750 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:32,413 INFO L93 Difference]: Finished difference Result 382 states and 423 transitions. [2023-11-29 00:47:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 00:47:32,414 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-11-29 00:47:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:32,416 INFO L225 Difference]: With dead ends: 382 [2023-11-29 00:47:32,416 INFO L226 Difference]: Without dead ends: 380 [2023-11-29 00:47:32,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=604, Invalid=6202, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 00:47:32,418 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 113 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:32,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 458 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:47:32,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-29 00:47:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 328. [2023-11-29 00:47:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.1253822629969419) internal successors, (368), 327 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 368 transitions. [2023-11-29 00:47:32,557 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 368 transitions. Word has length 93 [2023-11-29 00:47:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:32,557 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 368 transitions. [2023-11-29 00:47:32,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 368 transitions. [2023-11-29 00:47:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-29 00:47:32,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:32,559 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 9, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:32,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:47:32,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:32,760 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:47:32,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:32,760 INFO L85 PathProgramCache]: Analyzing trace with hash -841404234, now seen corresponding path program 12 times [2023-11-29 00:47:32,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:32,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500289882] [2023-11-29 00:47:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:32,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 219 proven. 136 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 00:47:33,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:33,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500289882] [2023-11-29 00:47:33,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500289882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:33,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932095879] [2023-11-29 00:47:33,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:47:33,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:33,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:33,506 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:33,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:47:33,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-29 00:47:33,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:33,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 00:47:33,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:34,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-11-29 00:47:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 275 proven. 103 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-29 00:47:35,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:37,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-11-29 00:47:37,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-29 00:47:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 225 proven. 156 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-29 00:47:37,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932095879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:37,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:37,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 27] total 66 [2023-11-29 00:47:37,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056631362] [2023-11-29 00:47:37,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:37,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-29 00:47:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:37,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-29 00:47:37,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=902, Invalid=3388, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 00:47:37,766 INFO L87 Difference]: Start difference. First operand 328 states and 368 transitions. Second operand has 66 states, 66 states have (on average 3.515151515151515) internal successors, (232), 66 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:42,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:42,244 INFO L93 Difference]: Finished difference Result 378 states and 419 transitions. [2023-11-29 00:47:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 00:47:42,245 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.515151515151515) internal successors, (232), 66 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2023-11-29 00:47:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:42,247 INFO L225 Difference]: With dead ends: 378 [2023-11-29 00:47:42,247 INFO L226 Difference]: Without dead ends: 311 [2023-11-29 00:47:42,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5325 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3225, Invalid=12777, Unknown=0, NotChecked=0, Total=16002 [2023-11-29 00:47:42,249 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 439 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 79 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:42,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 214 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 955 Invalid, 1 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 00:47:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-29 00:47:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 280. [2023-11-29 00:47:42,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.1326164874551972) internal successors, (316), 279 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 316 transitions. [2023-11-29 00:47:42,343 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 316 transitions. Word has length 98 [2023-11-29 00:47:42,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:42,343 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 316 transitions. [2023-11-29 00:47:42,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.515151515151515) internal successors, (232), 66 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:42,343 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 316 transitions. [2023-11-29 00:47:42,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-29 00:47:42,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:42,344 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 12, 10, 10, 9, 9, 8, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:42,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:47:42,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:42,545 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:47:42,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash -494155381, now seen corresponding path program 13 times [2023-11-29 00:47:42,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:42,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329261502] [2023-11-29 00:47:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:42,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 22 proven. 531 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:47:44,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:44,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329261502] [2023-11-29 00:47:44,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329261502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:44,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009576917] [2023-11-29 00:47:44,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:47:44,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:44,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:44,012 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:44,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:47:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:44,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-29 00:47:44,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:44,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:47:44,473 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-29 00:47:44,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-29 00:47:44,530 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-29 00:47:44,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-29 00:47:44,597 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-29 00:47:44,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-29 00:47:44,666 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-29 00:47:44,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-29 00:47:44,736 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-29 00:47:44,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-29 00:47:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 52 proven. 501 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 00:47:45,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:46,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-29 00:47:46,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:47:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 18 proven. 517 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-29 00:47:46,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009576917] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:46,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:46,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 30] total 64 [2023-11-29 00:47:46,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616716372] [2023-11-29 00:47:46,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:46,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 00:47:46,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 00:47:46,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=3672, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 00:47:46,826 INFO L87 Difference]: Start difference. First operand 280 states and 316 transitions. Second operand has 64 states, 64 states have (on average 3.25) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:51,487 INFO L93 Difference]: Finished difference Result 606 states and 682 transitions. [2023-11-29 00:47:51,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-29 00:47:51,487 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.25) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-11-29 00:47:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:51,490 INFO L225 Difference]: With dead ends: 606 [2023-11-29 00:47:51,490 INFO L226 Difference]: Without dead ends: 363 [2023-11-29 00:47:51,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 184 SyntacticMatches, 9 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6409 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2163, Invalid=17859, Unknown=0, NotChecked=0, Total=20022 [2023-11-29 00:47:51,492 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 582 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 5813 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 6103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 5813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:51,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 553 Invalid, 6103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 5813 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 00:47:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-11-29 00:47:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 302. [2023-11-29 00:47:51,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.106312292358804) internal successors, (333), 301 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 333 transitions. [2023-11-29 00:47:51,596 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 333 transitions. Word has length 111 [2023-11-29 00:47:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:51,597 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 333 transitions. [2023-11-29 00:47:51,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.25) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:51,597 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 333 transitions. [2023-11-29 00:47:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-29 00:47:51,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:51,598 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 12, 11, 11, 10, 10, 9, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:51,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:47:51,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:51,799 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:47:51,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:51,799 INFO L85 PathProgramCache]: Analyzing trace with hash -291940289, now seen corresponding path program 14 times [2023-11-29 00:47:51,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:51,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412909412] [2023-11-29 00:47:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:51,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 3 proven. 564 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 00:47:53,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:53,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412909412] [2023-11-29 00:47:53,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412909412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:53,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647623126] [2023-11-29 00:47:53,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:47:53,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:53,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:53,016 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:53,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:47:53,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:47:53,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:53,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 00:47:53,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:53,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:47:53,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:47:53,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:47:53,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:47:53,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:47:53,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:47:53,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:47:53,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:47:53,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:47:54,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 00:47:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 35 proven. 532 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 00:47:54,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:03,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 59 [2023-11-29 00:51:03,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2942 treesize of output 2926 [2023-11-29 00:51:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 30 proven. 535 refuted. 2 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 00:51:04,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647623126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:04,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:04,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 28] total 76 [2023-11-29 00:51:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614078272] [2023-11-29 00:51:04,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:04,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-29 00:51:04,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-29 00:51:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=5216, Unknown=39, NotChecked=0, Total=5700 [2023-11-29 00:51:04,354 INFO L87 Difference]: Start difference. First operand 302 states and 333 transitions. Second operand has 76 states, 76 states have (on average 3.6184210526315788) internal successors, (275), 76 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:12,826 INFO L93 Difference]: Finished difference Result 642 states and 703 transitions. [2023-11-29 00:51:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 00:51:12,826 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.6184210526315788) internal successors, (275), 76 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-11-29 00:51:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:12,829 INFO L225 Difference]: With dead ends: 642 [2023-11-29 00:51:12,829 INFO L226 Difference]: Without dead ends: 633 [2023-11-29 00:51:12,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6759 ImplicationChecksByTransitivity, 194.5s TimeCoverageRelationStatistics Valid=2369, Invalid=21154, Unknown=39, NotChecked=0, Total=23562 [2023-11-29 00:51:12,831 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1089 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 5374 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 5957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 5374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:12,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1089 Valid, 966 Invalid, 5957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 5374 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-29 00:51:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2023-11-29 00:51:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 395. [2023-11-29 00:51:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.1116751269035532) internal successors, (438), 394 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 438 transitions. [2023-11-29 00:51:12,977 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 438 transitions. Word has length 116 [2023-11-29 00:51:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:12,978 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 438 transitions. [2023-11-29 00:51:12,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.6184210526315788) internal successors, (275), 76 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 438 transitions. [2023-11-29 00:51:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-29 00:51:12,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:12,979 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 12, 12, 12, 11, 11, 10, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:12,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 00:51:13,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:13,179 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:13,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash -436413941, now seen corresponding path program 15 times [2023-11-29 00:51:13,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:13,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980558178] [2023-11-29 00:51:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 117 proven. 529 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 00:51:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980558178] [2023-11-29 00:51:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980558178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010106200] [2023-11-29 00:51:14,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:51:14,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:14,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:14,692 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:14,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:51:15,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-11-29 00:51:15,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:15,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 00:51:15,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:16,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2023-11-29 00:51:16,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2023-11-29 00:51:16,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2023-11-29 00:51:16,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2023-11-29 00:51:17,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-29 00:51:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 37 proven. 582 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-29 00:51:17,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:18,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-11-29 00:51:18,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:51:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 22 proven. 597 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-29 00:51:19,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010106200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:19,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:19,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 80 [2023-11-29 00:51:19,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785396038] [2023-11-29 00:51:19,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:19,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-29 00:51:19,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:19,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-29 00:51:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=5764, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 00:51:19,128 INFO L87 Difference]: Start difference. First operand 395 states and 438 transitions. Second operand has 80 states, 80 states have (on average 3.65) internal successors, (292), 80 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:21,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:51:24,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:51:26,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:51:31,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:51:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:58,778 INFO L93 Difference]: Finished difference Result 887 states and 963 transitions. [2023-11-29 00:51:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2023-11-29 00:51:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.65) internal successors, (292), 80 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-29 00:51:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:58,783 INFO L225 Difference]: With dead ends: 887 [2023-11-29 00:51:58,784 INFO L226 Difference]: Without dead ends: 873 [2023-11-29 00:51:58,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28957 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=7176, Invalid=77795, Unknown=1, NotChecked=0, Total=84972 [2023-11-29 00:51:58,790 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2327 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 6316 mSolverCounterSat, 1015 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2327 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 7335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1015 IncrementalHoareTripleChecker+Valid, 6316 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:58,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2327 Valid, 1201 Invalid, 7335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1015 Valid, 6316 Invalid, 4 Unknown, 0 Unchecked, 14.7s Time] [2023-11-29 00:51:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2023-11-29 00:51:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 407. [2023-11-29 00:51:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.1083743842364533) internal successors, (450), 406 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 450 transitions. [2023-11-29 00:51:59,016 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 450 transitions. Word has length 121 [2023-11-29 00:51:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:59,017 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 450 transitions. [2023-11-29 00:51:59,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.65) internal successors, (292), 80 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 450 transitions. [2023-11-29 00:51:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-29 00:51:59,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:59,019 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 13, 13, 12, 12, 12, 10, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:59,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:51:59,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:51:59,220 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:59,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash 756243265, now seen corresponding path program 16 times [2023-11-29 00:51:59,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:59,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753344269] [2023-11-29 00:51:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:59,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 24 proven. 684 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-29 00:52:01,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:01,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753344269] [2023-11-29 00:52:01,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753344269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:01,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504594812] [2023-11-29 00:52:01,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:52:01,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:01,134 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:01,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc89ed0-4323-4ea2-a065-ca6d1d1c3db2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:52:01,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:52:01,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:52:01,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-29 00:52:01,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:01,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 00:52:01,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:52:01,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-29 00:52:01,933 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-29 00:52:01,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2023-11-29 00:52:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 680 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 00:52:04,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:11,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2023-11-29 00:52:11,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 139 [2023-11-29 00:52:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 678 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-29 00:52:11,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504594812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:11,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:11,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 29] total 84 [2023-11-29 00:52:11,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835880342] [2023-11-29 00:52:11,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:11,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-29 00:52:11,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-29 00:52:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=6494, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 00:52:11,735 INFO L87 Difference]: Start difference. First operand 407 states and 450 transitions. Second operand has 84 states, 84 states have (on average 3.75) internal successors, (315), 84 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)