./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/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_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/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_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:56:58,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:56:58,986 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:56:58,990 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:56:58,991 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:56:59,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:56:59,016 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:56:59,016 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:56:59,017 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:56:59,017 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:56:59,018 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:56:59,018 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:56:59,019 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:56:59,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:56:59,020 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:56:59,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:56:59,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:56:59,022 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:56:59,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:56:59,023 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:56:59,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:56:59,024 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:56:59,024 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:56:59,025 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:56:59,025 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:56:59,025 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:56:59,026 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:56:59,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:56:59,027 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:56:59,027 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:56:59,027 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:56:59,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:56:59,028 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:56:59,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:56:59,029 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:56:59,029 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:56:59,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:56:59,029 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:56:59,030 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:56:59,030 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:56:59,030 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:56:59,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:56:59,030 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_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2023-11-28 23:56:59,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:56:59,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:56:59,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:56:59,265 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:56:59,266 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:56:59,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-tiling/pr2.c [2023-11-28 23:57:01,980 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:57:02,158 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:57:02,159 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/sv-benchmarks/c/array-tiling/pr2.c [2023-11-28 23:57:02,166 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/data/cee97de98/2683cf306a2c49eb9b68e50fc940afcc/FLAG6b97b4f5c [2023-11-28 23:57:02,182 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/data/cee97de98/2683cf306a2c49eb9b68e50fc940afcc [2023-11-28 23:57:02,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:57:02,186 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:57:02,188 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:57:02,188 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:57:02,193 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:57:02,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,195 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e62de8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02, skipping insertion in model container [2023-11-28 23:57:02,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,218 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:57:02,364 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_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2023-11-28 23:57:02,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:57:02,393 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:57:02,406 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_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2023-11-28 23:57:02,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:57:02,429 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:57:02,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02 WrapperNode [2023-11-28 23:57:02,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:57:02,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:57:02,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:57:02,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:57:02,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,446 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,467 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2023-11-28 23:57:02,467 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:57:02,468 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:57:02,468 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:57:02,468 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:57:02,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,482 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,496 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 0, 6]. The 4 writes are split as follows [0, 4, 0]. [2023-11-28 23:57:02,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,503 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,506 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,508 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,511 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:57:02,512 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:57:02,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:57:02,512 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:57:02,513 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (1/1) ... [2023-11-28 23:57:02,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:57:02,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:02,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:57:02,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:57:02,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:57:02,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:57:02,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 23:57:02,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 23:57:02,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:57:02,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:57:02,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:57:02,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 23:57:02,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:57:02,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:57:02,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 23:57:02,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 23:57:02,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 23:57:02,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:57:02,660 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:57:02,662 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:57:02,814 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:57:02,835 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:57:02,835 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-28 23:57:02,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:57:02 BoogieIcfgContainer [2023-11-28 23:57:02,836 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:57:02,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:57:02,839 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:57:02,842 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:57:02,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:57:02" (1/3) ... [2023-11-28 23:57:02,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4b6950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:57:02, skipping insertion in model container [2023-11-28 23:57:02,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:02" (2/3) ... [2023-11-28 23:57:02,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4b6950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:57:02, skipping insertion in model container [2023-11-28 23:57:02,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:57:02" (3/3) ... [2023-11-28 23:57:02,845 INFO L112 eAbstractionObserver]: Analyzing ICFG pr2.c [2023-11-28 23:57:02,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:57:02,864 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 23:57:02,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:57:02,913 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;@4de36ea9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:57:02,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 23:57:02,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 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) [2023-11-28 23:57:02,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-28 23:57:02,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:02,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:02,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:02,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:02,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1365372683, now seen corresponding path program 1 times [2023-11-28 23:57:02,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:02,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144509796] [2023-11-28 23:57:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:02,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:03,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:03,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144509796] [2023-11-28 23:57:03,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144509796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:03,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:03,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:57:03,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538845786] [2023-11-28 23:57:03,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:03,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:57:03,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:03,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:57:03,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:57:03,155 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 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) 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) [2023-11-28 23:57:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:03,179 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-11-28 23:57:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:57:03,182 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 [2023-11-28 23:57:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:03,189 INFO L225 Difference]: With dead ends: 38 [2023-11-28 23:57:03,189 INFO L226 Difference]: Without dead ends: 17 [2023-11-28 23:57:03,192 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 [2023-11-28 23:57:03,196 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2023-11-28 23:57:03,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:57:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-28 23:57:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-28 23:57:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-11-28 23:57:03,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-28 23:57:03,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2023-11-28 23:57:03,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:03,228 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-28 23:57:03,228 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) [2023-11-28 23:57:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-28 23:57:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-28 23:57:03,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:03,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:03,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:57:03,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:03,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:03,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2045431053, now seen corresponding path program 1 times [2023-11-28 23:57:03,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:03,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799164097] [2023-11-28 23:57:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:03,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:03,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799164097] [2023-11-28 23:57:03,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799164097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:03,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:03,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:57:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699824799] [2023-11-28 23:57:03,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:03,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:57:03,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:57:03,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:57:03,406 INFO L87 Difference]: Start difference. First operand 17 states and 21 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) [2023-11-28 23:57:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:03,444 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-11-28 23:57:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:57:03,445 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 [2023-11-28 23:57:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:03,445 INFO L225 Difference]: With dead ends: 22 [2023-11-28 23:57:03,446 INFO L226 Difference]: Without dead ends: 20 [2023-11-28 23:57:03,446 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 [2023-11-28 23:57:03,447 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 48 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 [2023-11-28 23:57:03,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 48 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:57:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-28 23:57:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-11-28 23:57:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2023-11-28 23:57:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-28 23:57:03,453 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-11-28 23:57:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:03,454 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-28 23:57:03,454 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) [2023-11-28 23:57:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-28 23:57:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-28 23:57:03,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:03,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:03,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:57:03,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:03,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2045490635, now seen corresponding path program 1 times [2023-11-28 23:57:03,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:03,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476774065] [2023-11-28 23:57:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:03,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:03,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:03,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476774065] [2023-11-28 23:57:03,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476774065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:03,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:03,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:57:03,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755788396] [2023-11-28 23:57:03,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:03,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:57:03,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:03,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:57:03,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:57:03,709 INFO L87 Difference]: Start difference. First operand 19 states and 23 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) [2023-11-28 23:57:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:03,757 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-11-28 23:57:03,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:57:03,758 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 [2023-11-28 23:57:03,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:03,758 INFO L225 Difference]: With dead ends: 33 [2023-11-28 23:57:03,758 INFO L226 Difference]: Without dead ends: 23 [2023-11-28 23:57:03,759 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 [2023-11-28 23:57:03,760 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:03,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:57:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-28 23:57:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-11-28 23:57:03,766 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) [2023-11-28 23:57:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-28 23:57:03,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-11-28 23:57:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:03,767 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-28 23:57:03,768 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) [2023-11-28 23:57:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-28 23:57:03,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-28 23:57:03,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:03,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:03,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:57:03,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:03,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash 199609668, now seen corresponding path program 1 times [2023-11-28 23:57:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:03,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414507349] [2023-11-28 23:57:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:03,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:04,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:04,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414507349] [2023-11-28 23:57:04,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414507349] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:04,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886547201] [2023-11-28 23:57:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:04,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:04,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:04,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:04,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:57:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:04,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:57:04,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:04,408 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 [2023-11-28 23:57:04,446 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 23 treesize of output 11 [2023-11-28 23:57:04,523 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 [2023-11-28 23:57:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:04,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:04,632 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 17 treesize of output 15 [2023-11-28 23:57:04,638 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 16 treesize of output 14 [2023-11-28 23:57:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:04,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886547201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:04,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:04,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2023-11-28 23:57:04,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523115592] [2023-11-28 23:57:04,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:04,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 23:57:04,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:04,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 23:57:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-28 23:57:04,659 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2023-11-28 23:57:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:05,204 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2023-11-28 23:57:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-28 23:57:05,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 16 [2023-11-28 23:57:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:05,207 INFO L225 Difference]: With dead ends: 102 [2023-11-28 23:57:05,207 INFO L226 Difference]: Without dead ends: 88 [2023-11-28 23:57:05,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 23:57:05,209 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 197 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:05,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 90 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:57:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-28 23:57:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 33. [2023-11-28 23:57:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 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) [2023-11-28 23:57:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-28 23:57:05,220 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 16 [2023-11-28 23:57:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:05,220 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-28 23:57:05,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2023-11-28 23:57:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-28 23:57:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-28 23:57:05,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:05,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:05,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:57:05,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:05,425 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:05,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash -193417342, now seen corresponding path program 1 times [2023-11-28 23:57:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:05,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49703020] [2023-11-28 23:57:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:05,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:05,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:05,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49703020] [2023-11-28 23:57:05,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49703020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:05,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:05,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:57:05,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096433136] [2023-11-28 23:57:05,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:05,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:57:05,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:57:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:57:05,510 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-28 23:57:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:05,543 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2023-11-28 23:57:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:57:05,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2023-11-28 23:57:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:05,544 INFO L225 Difference]: With dead ends: 56 [2023-11-28 23:57:05,544 INFO L226 Difference]: Without dead ends: 42 [2023-11-28 23:57:05,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:57:05,546 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:05,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:57:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-28 23:57:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2023-11-28 23:57:05,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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) [2023-11-28 23:57:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-11-28 23:57:05,554 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 16 [2023-11-28 23:57:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:05,554 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-11-28 23:57:05,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-28 23:57:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-11-28 23:57:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-28 23:57:05,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:05,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:05,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:57:05,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:05,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 486641028, now seen corresponding path program 1 times [2023-11-28 23:57:05,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:05,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739789833] [2023-11-28 23:57:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:05,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:05,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:05,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739789833] [2023-11-28 23:57:05,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739789833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:05,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049704024] [2023-11-28 23:57:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:05,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:05,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:05,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:05,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:57:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:05,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-28 23:57:05,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:05,928 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 [2023-11-28 23:57:05,939 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 23 treesize of output 11 [2023-11-28 23:57:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:05,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:06,089 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 13 [2023-11-28 23:57:06,093 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 14 treesize of output 12 [2023-11-28 23:57:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:06,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049704024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:06,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:06,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2023-11-28 23:57:06,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136155345] [2023-11-28 23:57:06,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:06,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 23:57:06,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:06,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 23:57:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-28 23:57:06,107 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2023-11-28 23:57:06,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:06,426 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2023-11-28 23:57:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-28 23:57:06,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 16 [2023-11-28 23:57:06,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:06,427 INFO L225 Difference]: With dead ends: 72 [2023-11-28 23:57:06,428 INFO L226 Difference]: Without dead ends: 70 [2023-11-28 23:57:06,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2023-11-28 23:57:06,429 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:06,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 93 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:57:06,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-28 23:57:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2023-11-28 23:57:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2023-11-28 23:57:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-11-28 23:57:06,438 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 16 [2023-11-28 23:57:06,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:06,438 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-11-28 23:57:06,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2023-11-28 23:57:06,438 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-11-28 23:57:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-28 23:57:06,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:06,439 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:06,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:57:06,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:06,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:06,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1237798271, now seen corresponding path program 1 times [2023-11-28 23:57:06,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:06,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726253887] [2023-11-28 23:57:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:06,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:06,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726253887] [2023-11-28 23:57:06,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726253887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:06,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:06,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:57:06,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691906976] [2023-11-28 23:57:06,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:06,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:57:06,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:57:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:57:06,678 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-11-28 23:57:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:06,698 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2023-11-28 23:57:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:57:06,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2023-11-28 23:57:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:06,699 INFO L225 Difference]: With dead ends: 58 [2023-11-28 23:57:06,699 INFO L226 Difference]: Without dead ends: 44 [2023-11-28 23:57:06,700 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 [2023-11-28 23:57:06,700 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:06,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:57:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-28 23:57:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2023-11-28 23:57:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 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) [2023-11-28 23:57:06,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-11-28 23:57:06,708 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2023-11-28 23:57:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:06,709 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-11-28 23:57:06,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-11-28 23:57:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-11-28 23:57:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-28 23:57:06,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:06,710 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:06,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 23:57:06,710 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:06,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:06,711 INFO L85 PathProgramCache]: Analyzing trace with hash -470241182, now seen corresponding path program 1 times [2023-11-28 23:57:06,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:06,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193673502] [2023-11-28 23:57:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:06,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:06,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:06,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193673502] [2023-11-28 23:57:06,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193673502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:06,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249475597] [2023-11-28 23:57:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:06,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:06,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:06,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:06,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:57:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:07,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:57:07,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:07,098 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 [2023-11-28 23:57:07,225 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 [2023-11-28 23:57:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:07,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:07,313 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 [2023-11-28 23:57:07,316 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 18 treesize of output 14 [2023-11-28 23:57:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:07,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249475597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:07,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:07,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-28 23:57:07,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330900006] [2023-11-28 23:57:07,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:07,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 23:57:07,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:07,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 23:57:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-28 23:57:07,335 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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) [2023-11-28 23:57:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:07,565 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2023-11-28 23:57:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 23:57:07,565 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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 21 [2023-11-28 23:57:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:07,566 INFO L225 Difference]: With dead ends: 72 [2023-11-28 23:57:07,566 INFO L226 Difference]: Without dead ends: 63 [2023-11-28 23:57:07,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-11-28 23:57:07,568 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:07,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 79 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-28 23:57:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2023-11-28 23:57:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 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) [2023-11-28 23:57:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-28 23:57:07,577 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 21 [2023-11-28 23:57:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:07,577 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-28 23:57:07,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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) [2023-11-28 23:57:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-28 23:57:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-28 23:57:07,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:07,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:07,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:57:07,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:07,783 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:07,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1481358432, now seen corresponding path program 1 times [2023-11-28 23:57:07,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:07,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213766620] [2023-11-28 23:57:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:07,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:08,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:08,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213766620] [2023-11-28 23:57:08,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213766620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:08,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324024742] [2023-11-28 23:57:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:08,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:08,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:08,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:08,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:57:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:08,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 23:57:08,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:08,092 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 [2023-11-28 23:57:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:08,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:08,211 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 17 treesize of output 15 [2023-11-28 23:57:08,213 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 16 treesize of output 12 [2023-11-28 23:57:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:08,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324024742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:08,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:08,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2023-11-28 23:57:08,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108256160] [2023-11-28 23:57:08,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:08,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 23:57:08,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 23:57:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-28 23:57:08,226 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2023-11-28 23:57:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:08,470 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-11-28 23:57:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 23:57:08,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) Word has length 21 [2023-11-28 23:57:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:08,472 INFO L225 Difference]: With dead ends: 78 [2023-11-28 23:57:08,472 INFO L226 Difference]: Without dead ends: 76 [2023-11-28 23:57:08,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2023-11-28 23:57:08,473 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:08,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 104 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-28 23:57:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2023-11-28 23:57:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 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) [2023-11-28 23:57:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2023-11-28 23:57:08,483 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 21 [2023-11-28 23:57:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:08,484 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2023-11-28 23:57:08,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2023-11-28 23:57:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2023-11-28 23:57:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-28 23:57:08,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:08,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:08,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:57:08,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:08,685 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:08,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:08,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2076003001, now seen corresponding path program 1 times [2023-11-28 23:57:08,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:08,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713665031] [2023-11-28 23:57:08,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:08,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 23:57:08,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:08,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713665031] [2023-11-28 23:57:08,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713665031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:08,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:08,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:57:08,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670972725] [2023-11-28 23:57:08,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:08,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:57:08,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:08,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:57:08,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:57:08,717 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-28 23:57:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:08,739 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-11-28 23:57:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:57:08,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 25 [2023-11-28 23:57:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:08,740 INFO L225 Difference]: With dead ends: 74 [2023-11-28 23:57:08,740 INFO L226 Difference]: Without dead ends: 58 [2023-11-28 23:57:08,740 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 [2023-11-28 23:57:08,741 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 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 [2023-11-28 23:57:08,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 23:57:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-28 23:57:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2023-11-28 23:57:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 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) [2023-11-28 23:57:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2023-11-28 23:57:08,750 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 25 [2023-11-28 23:57:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:08,751 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2023-11-28 23:57:08,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-28 23:57:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2023-11-28 23:57:08,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-28 23:57:08,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:08,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:08,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 23:57:08,752 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:08,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash -697495548, now seen corresponding path program 2 times [2023-11-28 23:57:08,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:08,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15418276] [2023-11-28 23:57:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:08,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:09,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:09,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15418276] [2023-11-28 23:57:09,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15418276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:09,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709958075] [2023-11-28 23:57:09,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:57:09,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:09,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:09,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:09,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 23:57:09,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:57:09,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:09,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 23:57:09,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:09,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:09,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709958075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:09,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:09,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-28 23:57:09,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652036889] [2023-11-28 23:57:09,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:09,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 23:57:09,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:09,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 23:57:09,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2023-11-28 23:57:09,534 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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) [2023-11-28 23:57:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:09,711 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2023-11-28 23:57:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 23:57:09,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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 26 [2023-11-28 23:57:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:09,712 INFO L225 Difference]: With dead ends: 99 [2023-11-28 23:57:09,712 INFO L226 Difference]: Without dead ends: 67 [2023-11-28 23:57:09,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2023-11-28 23:57:09,714 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:09,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 67 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-28 23:57:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-11-28 23:57:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 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) [2023-11-28 23:57:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-11-28 23:57:09,723 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 26 [2023-11-28 23:57:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:09,724 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-11-28 23:57:09,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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) [2023-11-28 23:57:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-11-28 23:57:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-28 23:57:09,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:09,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:09,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-28 23:57:09,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 23:57:09,929 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:09,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1708646467, now seen corresponding path program 3 times [2023-11-28 23:57:09,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:09,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165887075] [2023-11-28 23:57:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:09,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:10,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165887075] [2023-11-28 23:57:10,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165887075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001999685] [2023-11-28 23:57:10,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:57:10,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:10,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:10,315 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:10,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 23:57:10,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 23:57:10,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:10,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 23:57:10,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:10,484 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 19 treesize of output 1 [2023-11-28 23:57:10,514 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 29 treesize of output 13 [2023-11-28 23:57:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:10,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:10,897 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 [2023-11-28 23:57:10,899 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 [2023-11-28 23:57:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:10,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001999685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:10,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:10,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2023-11-28 23:57:10,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696889473] [2023-11-28 23:57:10,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 23:57:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 23:57:10,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-11-28 23:57:10,980 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 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) [2023-11-28 23:57:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:12,045 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2023-11-28 23:57:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-28 23:57:12,045 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 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 [2023-11-28 23:57:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:12,046 INFO L225 Difference]: With dead ends: 133 [2023-11-28 23:57:12,046 INFO L226 Difference]: Without dead ends: 124 [2023-11-28 23:57:12,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=460, Invalid=2296, Unknown=0, NotChecked=0, Total=2756 [2023-11-28 23:57:12,049 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 243 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:12,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 209 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:57:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-28 23:57:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 70. [2023-11-28 23:57:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 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) [2023-11-28 23:57:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2023-11-28 23:57:12,063 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 30 [2023-11-28 23:57:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:12,064 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2023-11-28 23:57:12,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 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) [2023-11-28 23:57:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2023-11-28 23:57:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-28 23:57:12,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:12,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:12,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 23:57:12,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 23:57:12,268 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:12,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1859723203, now seen corresponding path program 1 times [2023-11-28 23:57:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:12,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130291612] [2023-11-28 23:57:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:12,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:12,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130291612] [2023-11-28 23:57:12,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130291612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:12,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781144163] [2023-11-28 23:57:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:12,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:12,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:12,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:12,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 23:57:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:12,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-28 23:57:12,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:12,640 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 [2023-11-28 23:57:12,662 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 23 treesize of output 11 [2023-11-28 23:57:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:12,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:12,932 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 17 treesize of output 15 [2023-11-28 23:57:12,934 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 16 treesize of output 12 [2023-11-28 23:57:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:12,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781144163] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:12,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:12,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 24 [2023-11-28 23:57:12,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377693074] [2023-11-28 23:57:12,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 23:57:12,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 23:57:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-11-28 23:57:12,945 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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) [2023-11-28 23:57:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:13,427 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2023-11-28 23:57:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-28 23:57:13,428 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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 [2023-11-28 23:57:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:13,428 INFO L225 Difference]: With dead ends: 119 [2023-11-28 23:57:13,428 INFO L226 Difference]: Without dead ends: 117 [2023-11-28 23:57:13,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2023-11-28 23:57:13,430 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:13,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 140 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:57:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-28 23:57:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2023-11-28 23:57:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 74 states have internal predecessors, (85), 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) [2023-11-28 23:57:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2023-11-28 23:57:13,442 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 30 [2023-11-28 23:57:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:13,443 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2023-11-28 23:57:13,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 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) [2023-11-28 23:57:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2023-11-28 23:57:13,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-28 23:57:13,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:13,444 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:13,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 23:57:13,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 23:57:13,645 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:13,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2072433147, now seen corresponding path program 2 times [2023-11-28 23:57:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:13,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229912501] [2023-11-28 23:57:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:13,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:13,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229912501] [2023-11-28 23:57:13,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229912501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:13,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016982036] [2023-11-28 23:57:13,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:57:13,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:13,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:13,926 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:13,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 23:57:14,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:57:14,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:14,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 23:57:14,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:14,037 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 [2023-11-28 23:57:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:14,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:14,243 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 17 treesize of output 15 [2023-11-28 23:57:14,245 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 16 treesize of output 12 [2023-11-28 23:57:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:14,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016982036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:14,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:14,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 20 [2023-11-28 23:57:14,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341482854] [2023-11-28 23:57:14,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:14,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 23:57:14,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:14,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 23:57:14,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-28 23:57:14,271 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 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) [2023-11-28 23:57:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:14,862 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2023-11-28 23:57:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-28 23:57:14,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 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 [2023-11-28 23:57:14,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:14,864 INFO L225 Difference]: With dead ends: 147 [2023-11-28 23:57:14,864 INFO L226 Difference]: Without dead ends: 145 [2023-11-28 23:57:14,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2023-11-28 23:57:14,866 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:14,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 151 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:57:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-28 23:57:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 85. [2023-11-28 23:57:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 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) [2023-11-28 23:57:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2023-11-28 23:57:14,890 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 35 [2023-11-28 23:57:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:14,890 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2023-11-28 23:57:14,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 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) [2023-11-28 23:57:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2023-11-28 23:57:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-28 23:57:14,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:14,891 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:14,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 23:57:15,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 23:57:15,092 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:15,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:15,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1685496003, now seen corresponding path program 4 times [2023-11-28 23:57:15,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:15,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248331724] [2023-11-28 23:57:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:15,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:15,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:15,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248331724] [2023-11-28 23:57:15,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248331724] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:15,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641484011] [2023-11-28 23:57:15,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:57:15,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:15,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:15,506 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:15,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 23:57:15,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:57:15,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:15,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:57:15,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:16,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:16,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641484011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:16,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:16,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2023-11-28 23:57:16,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270149201] [2023-11-28 23:57:16,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:16,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-28 23:57:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-28 23:57:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 23:57:16,230 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 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) [2023-11-28 23:57:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:16,616 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2023-11-28 23:57:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 23:57:16,616 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 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 [2023-11-28 23:57:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:16,617 INFO L225 Difference]: With dead ends: 168 [2023-11-28 23:57:16,617 INFO L226 Difference]: Without dead ends: 106 [2023-11-28 23:57:16,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=488, Invalid=1492, Unknown=0, NotChecked=0, Total=1980 [2023-11-28 23:57:16,619 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 211 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:16,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 159 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:57:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-28 23:57:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2023-11-28 23:57:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 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) [2023-11-28 23:57:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2023-11-28 23:57:16,636 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 40 [2023-11-28 23:57:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:16,637 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2023-11-28 23:57:16,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 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) [2023-11-28 23:57:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2023-11-28 23:57:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-28 23:57:16,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:16,638 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:16,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-28 23:57:16,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 23:57:16,845 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:16,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2033322186, now seen corresponding path program 5 times [2023-11-28 23:57:16,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:16,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269316155] [2023-11-28 23:57:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:16,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:17,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:17,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269316155] [2023-11-28 23:57:17,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269316155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:17,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102486513] [2023-11-28 23:57:17,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:57:17,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:17,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:17,349 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:17,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 23:57:17,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-28 23:57:17,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:17,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-28 23:57:17,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:17,530 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 [2023-11-28 23:57:17,620 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 19 treesize of output 18 [2023-11-28 23:57:17,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:17,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-28 23:57:17,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:17,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 38 [2023-11-28 23:57:17,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:17,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 48 [2023-11-28 23:57:18,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:18,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 22 [2023-11-28 23:57:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:18,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:19,245 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 95 treesize of output 91 [2023-11-28 23:57:19,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:19,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 582 treesize of output 534 [2023-11-28 23:57:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:19,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102486513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:19,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:19,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 48 [2023-11-28 23:57:19,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589820705] [2023-11-28 23:57:19,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:19,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-28 23:57:19,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-28 23:57:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2023-11-28 23:57:19,340 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 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) [2023-11-28 23:57:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:25,881 INFO L93 Difference]: Finished difference Result 270 states and 298 transitions. [2023-11-28 23:57:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-28 23:57:25,882 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 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) Word has length 44 [2023-11-28 23:57:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:25,883 INFO L225 Difference]: With dead ends: 270 [2023-11-28 23:57:25,883 INFO L226 Difference]: Without dead ends: 261 [2023-11-28 23:57:25,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3317 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1947, Invalid=11163, Unknown=0, NotChecked=0, Total=13110 [2023-11-28 23:57:25,887 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 754 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:25,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 403 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-28 23:57:25,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-28 23:57:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 142. [2023-11-28 23:57:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.127659574468085) internal successors, (159), 141 states have internal predecessors, (159), 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) [2023-11-28 23:57:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 159 transitions. [2023-11-28 23:57:25,906 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 159 transitions. Word has length 44 [2023-11-28 23:57:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:25,906 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 159 transitions. [2023-11-28 23:57:25,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 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) [2023-11-28 23:57:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 159 transitions. [2023-11-28 23:57:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-28 23:57:25,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:25,907 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:25,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-28 23:57:26,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 23:57:26,108 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:26,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:26,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1748917570, now seen corresponding path program 3 times [2023-11-28 23:57:26,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:26,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691087096] [2023-11-28 23:57:26,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:26,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:26,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691087096] [2023-11-28 23:57:26,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691087096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284487221] [2023-11-28 23:57:26,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:57:26,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:26,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:26,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:26,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 23:57:26,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-28 23:57:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:26,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-28 23:57:26,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:26,654 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 [2023-11-28 23:57:26,674 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 23 treesize of output 11 [2023-11-28 23:57:26,708 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 19 treesize of output 18 [2023-11-28 23:57:26,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:26,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-28 23:57:26,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:26,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2023-11-28 23:57:26,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:26,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 28 [2023-11-28 23:57:27,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:27,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2023-11-28 23:57:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:27,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:27,884 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 [2023-11-28 23:57:27,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:27,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 488 treesize of output 440 [2023-11-28 23:57:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:27,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284487221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:27,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:27,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 16] total 43 [2023-11-28 23:57:27,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717828820] [2023-11-28 23:57:27,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-28 23:57:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-28 23:57:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2023-11-28 23:57:27,942 INFO L87 Difference]: Start difference. First operand 142 states and 159 transitions. Second operand has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 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) [2023-11-28 23:57:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:30,077 INFO L93 Difference]: Finished difference Result 234 states and 257 transitions. [2023-11-28 23:57:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-28 23:57:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 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) Word has length 44 [2023-11-28 23:57:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:30,078 INFO L225 Difference]: With dead ends: 234 [2023-11-28 23:57:30,079 INFO L226 Difference]: Without dead ends: 225 [2023-11-28 23:57:30,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=874, Invalid=5288, Unknown=0, NotChecked=0, Total=6162 [2023-11-28 23:57:30,081 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 411 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:30,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 277 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:57:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-28 23:57:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 121. [2023-11-28 23:57:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.125) internal successors, (135), 120 states have internal predecessors, (135), 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) [2023-11-28 23:57:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2023-11-28 23:57:30,101 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 44 [2023-11-28 23:57:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:30,102 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2023-11-28 23:57:30,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.8372093023255816) internal successors, (122), 43 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) [2023-11-28 23:57:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2023-11-28 23:57:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-28 23:57:30,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:30,103 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:30,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 23:57:30,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 23:57:30,303 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:30,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:30,303 INFO L85 PathProgramCache]: Analyzing trace with hash 984283126, now seen corresponding path program 2 times [2023-11-28 23:57:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:30,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236369898] [2023-11-28 23:57:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:30,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:30,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:30,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236369898] [2023-11-28 23:57:30,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236369898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:30,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462880260] [2023-11-28 23:57:30,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:57:30,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:30,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:30,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:30,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 23:57:30,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:57:30,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:30,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-28 23:57:30,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:30,784 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 [2023-11-28 23:57:30,819 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 23 treesize of output 11 [2023-11-28 23:57:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:31,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:31,208 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 17 treesize of output 15 [2023-11-28 23:57:31,210 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 16 treesize of output 12 [2023-11-28 23:57:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:31,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462880260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:31,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:31,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 30 [2023-11-28 23:57:31,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489033961] [2023-11-28 23:57:31,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:31,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-28 23:57:31,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-28 23:57:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-11-28 23:57:31,224 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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) [2023-11-28 23:57:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:32,099 INFO L93 Difference]: Finished difference Result 191 states and 212 transitions. [2023-11-28 23:57:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-28 23:57:32,099 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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 44 [2023-11-28 23:57:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:32,100 INFO L225 Difference]: With dead ends: 191 [2023-11-28 23:57:32,101 INFO L226 Difference]: Without dead ends: 189 [2023-11-28 23:57:32,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=3745, Unknown=0, NotChecked=0, Total=4290 [2023-11-28 23:57:32,103 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 98 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:32,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 202 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:57:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-28 23:57:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 126. [2023-11-28 23:57:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.128) internal successors, (141), 125 states have internal predecessors, (141), 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) [2023-11-28 23:57:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2023-11-28 23:57:32,127 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 44 [2023-11-28 23:57:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:32,127 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2023-11-28 23:57:32,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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) [2023-11-28 23:57:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2023-11-28 23:57:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-28 23:57:32,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:32,128 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:32,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-28 23:57:32,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 23:57:32,328 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:32,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:32,329 INFO L85 PathProgramCache]: Analyzing trace with hash -647620246, now seen corresponding path program 4 times [2023-11-28 23:57:32,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:32,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426709138] [2023-11-28 23:57:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:32,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:32,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426709138] [2023-11-28 23:57:32,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426709138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:32,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509686041] [2023-11-28 23:57:32,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:57:32,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:32,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:32,671 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:32,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 23:57:32,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:57:32,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:32,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-28 23:57:32,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:32,757 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 [2023-11-28 23:57:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:32,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:33,027 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 17 treesize of output 15 [2023-11-28 23:57:33,028 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 16 treesize of output 12 [2023-11-28 23:57:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509686041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:33,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:33,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 25 [2023-11-28 23:57:33,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467011844] [2023-11-28 23:57:33,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:33,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-28 23:57:33,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-28 23:57:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-11-28 23:57:33,043 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 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) [2023-11-28 23:57:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:34,564 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2023-11-28 23:57:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-28 23:57:34,565 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 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 49 [2023-11-28 23:57:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:34,566 INFO L225 Difference]: With dead ends: 261 [2023-11-28 23:57:34,566 INFO L226 Difference]: Without dead ends: 259 [2023-11-28 23:57:34,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=6600, Unknown=0, NotChecked=0, Total=7310 [2023-11-28 23:57:34,570 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 100 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:34,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 303 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:57:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-28 23:57:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 136. [2023-11-28 23:57:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.125925925925926) internal successors, (152), 135 states have internal predecessors, (152), 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) [2023-11-28 23:57:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2023-11-28 23:57:34,590 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 49 [2023-11-28 23:57:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:34,590 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2023-11-28 23:57:34,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 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) [2023-11-28 23:57:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2023-11-28 23:57:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-28 23:57:34,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:34,591 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:34,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 23:57:34,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:34,792 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:34,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash 807859062, now seen corresponding path program 6 times [2023-11-28 23:57:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:34,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528147415] [2023-11-28 23:57:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:34,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 73 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:35,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:35,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528147415] [2023-11-28 23:57:35,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528147415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:35,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33562961] [2023-11-28 23:57:35,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 23:57:35,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:35,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:35,309 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:35,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 23:57:35,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-28 23:57:35,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:35,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 23:57:35,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:35,595 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 16 treesize of output 12 [2023-11-28 23:57:35,714 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 38 treesize of output 16 [2023-11-28 23:57:35,773 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-28 23:57:35,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2023-11-28 23:57:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:37,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:44,010 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 37 treesize of output 35 [2023-11-28 23:57:44,014 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 268 treesize of output 256 [2023-11-28 23:57:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 87 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:44,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33562961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:44,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:44,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 50 [2023-11-28 23:57:44,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077294738] [2023-11-28 23:57:44,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:44,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-28 23:57:44,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:44,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-28 23:57:44,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1930, Unknown=3, NotChecked=0, Total=2450 [2023-11-28 23:57:44,391 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 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) [2023-11-28 23:57:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:48,682 INFO L93 Difference]: Finished difference Result 324 states and 352 transitions. [2023-11-28 23:57:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-28 23:57:48,683 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 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 54 [2023-11-28 23:57:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:48,684 INFO L225 Difference]: With dead ends: 324 [2023-11-28 23:57:48,684 INFO L226 Difference]: Without dead ends: 168 [2023-11-28 23:57:48,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3867 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2461, Invalid=9968, Unknown=3, NotChecked=0, Total=12432 [2023-11-28 23:57:48,687 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 666 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:48,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 242 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 23:57:48,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-28 23:57:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 138. [2023-11-28 23:57:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.1094890510948905) internal successors, (152), 137 states have internal predecessors, (152), 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) [2023-11-28 23:57:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2023-11-28 23:57:48,709 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 54 [2023-11-28 23:57:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:48,709 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2023-11-28 23:57:48,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 50 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) [2023-11-28 23:57:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2023-11-28 23:57:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-28 23:57:48,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:48,710 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:48,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 23:57:48,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:48,911 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:57:48,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:48,911 INFO L85 PathProgramCache]: Analyzing trace with hash 33366654, now seen corresponding path program 7 times [2023-11-28 23:57:48,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:57:48,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512617707] [2023-11-28 23:57:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:48,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:57:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:49,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:57:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512617707] [2023-11-28 23:57:49,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512617707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:49,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332862888] [2023-11-28 23:57:49,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 23:57:49,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:57:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:49,560 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:57:49,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 23:57:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:49,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-28 23:57:49,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:49,774 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 [2023-11-28 23:57:49,841 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 23 treesize of output 22 [2023-11-28 23:57:49,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:49,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:49,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2023-11-28 23:57:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:50,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:50,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:50,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2023-11-28 23:57:50,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:50,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:50,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:50,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:50,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:50,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 61 [2023-11-28 23:57:54,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:54,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:54,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:54,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:57:54,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:57:54,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 16 [2023-11-28 23:57:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:54,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:54,691 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 [2023-11-28 23:57:54,693 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 54 treesize of output 50 [2023-11-28 23:57:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:54,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332862888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:54,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:57:54,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 17] total 51 [2023-11-28 23:57:54,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716240934] [2023-11-28 23:57:54,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:54,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-28 23:57:54,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:57:54,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-28 23:57:54,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2303, Unknown=3, NotChecked=0, Total=2550 [2023-11-28 23:57:54,834 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand has 51 states, 51 states have (on average 3.156862745098039) internal successors, (161), 51 states have internal predecessors, (161), 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) [2023-11-28 23:57:58,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 23:58:02,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 23:58:06,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 23:58:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:08,580 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2023-11-28 23:58:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-28 23:58:08,581 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.156862745098039) internal successors, (161), 51 states have internal predecessors, (161), 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 57 [2023-11-28 23:58:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:08,582 INFO L225 Difference]: With dead ends: 192 [2023-11-28 23:58:08,582 INFO L226 Difference]: Without dead ends: 183 [2023-11-28 23:58:08,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=825, Invalid=6144, Unknown=3, NotChecked=0, Total=6972 [2023-11-28 23:58:08,583 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 163 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 58 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:08,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 456 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1285 Invalid, 3 Unknown, 0 Unchecked, 11.8s Time] [2023-11-28 23:58:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-28 23:58:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 143. [2023-11-28 23:58:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1056338028169015) internal successors, (157), 142 states have internal predecessors, (157), 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) [2023-11-28 23:58:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2023-11-28 23:58:08,607 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 57 [2023-11-28 23:58:08,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:08,607 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2023-11-28 23:58:08,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.156862745098039) internal successors, (161), 51 states have internal predecessors, (161), 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) [2023-11-28 23:58:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2023-11-28 23:58:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-28 23:58:08,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:08,607 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:08,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 23:58:08,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:08,808 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:58:08,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1257179209, now seen corresponding path program 5 times [2023-11-28 23:58:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:58:08,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971610936] [2023-11-28 23:58:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:08,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:58:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:09,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:58:09,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971610936] [2023-11-28 23:58:09,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971610936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:58:09,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248864937] [2023-11-28 23:58:09,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:58:09,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:09,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:58:09,294 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:58:09,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 23:58:09,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-28 23:58:09,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:58:09,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-28 23:58:09,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:09,543 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 19 treesize of output 1 [2023-11-28 23:58:09,601 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 35 treesize of output 13 [2023-11-28 23:58:09,618 INFO L349 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-11-28 23:58:09,619 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 35 treesize of output 13 [2023-11-28 23:58:09,924 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 [2023-11-28 23:58:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 37 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:58:09,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:10,458 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 25 treesize of output 23 [2023-11-28 23:58:10,461 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 102 treesize of output 94 [2023-11-28 23:58:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 37 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:58:10,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248864937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:10,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:58:10,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 17] total 46 [2023-11-28 23:58:10,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551687241] [2023-11-28 23:58:10,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:10,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-28 23:58:10,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:58:10,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-28 23:58:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1922, Unknown=0, NotChecked=0, Total=2070 [2023-11-28 23:58:10,641 INFO L87 Difference]: Start difference. First operand 143 states and 157 transitions. Second operand has 46 states, 46 states have (on average 3.4565217391304346) internal successors, (159), 46 states have internal predecessors, (159), 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) [2023-11-28 23:58:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:14,734 INFO L93 Difference]: Finished difference Result 276 states and 306 transitions. [2023-11-28 23:58:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-11-28 23:58:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.4565217391304346) internal successors, (159), 46 states have internal predecessors, (159), 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 58 [2023-11-28 23:58:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:14,736 INFO L225 Difference]: With dead ends: 276 [2023-11-28 23:58:14,736 INFO L226 Difference]: Without dead ends: 267 [2023-11-28 23:58:14,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1582, Invalid=15974, Unknown=0, NotChecked=0, Total=17556 [2023-11-28 23:58:14,738 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1091 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 2878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:14,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 631 Invalid, 2878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-28 23:58:14,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-11-28 23:58:14,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 153. [2023-11-28 23:58:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 152 states have internal predecessors, (166), 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) [2023-11-28 23:58:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2023-11-28 23:58:14,777 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 58 [2023-11-28 23:58:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:14,777 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2023-11-28 23:58:14,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.4565217391304346) internal successors, (159), 46 states have internal predecessors, (159), 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) [2023-11-28 23:58:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2023-11-28 23:58:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-28 23:58:14,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:14,778 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:14,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 23:58:14,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:14,978 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 23:58:14,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:14,979 INFO L85 PathProgramCache]: Analyzing trace with hash -520813903, now seen corresponding path program 3 times [2023-11-28 23:58:14,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:58:14,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232942637] [2023-11-28 23:58:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:14,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:58:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:15,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:58:15,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232942637] [2023-11-28 23:58:15,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232942637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:58:15,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542981607] [2023-11-28 23:58:15,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:58:15,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:58:15,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:58:15,379 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:58:15,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 23:58:15,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-28 23:58:15,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:58:15,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 23:58:15,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:15,527 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 [2023-11-28 23:58:15,553 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 23 treesize of output 11 [2023-11-28 23:58:15,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:15,589 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 23 treesize of output 22 [2023-11-28 23:58:15,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:15,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:58:15,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2023-11-28 23:58:15,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:15,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:58:15,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2023-11-28 23:58:15,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:15,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:15,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:15,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:58:15,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2023-11-28 23:58:23,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:58:23,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 64 [2023-11-28 23:58:23,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 23:58:23,111 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 23:58:23,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 67 [2023-11-28 23:58:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-11-28 23:58:23,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:24,156 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 25 treesize of output 23 [2023-11-28 23:58:24,159 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 52 treesize of output 50 [2023-11-28 23:58:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-28 23:58:24,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542981607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:24,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:58:24,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 10] total 37 [2023-11-28 23:58:24,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062888938] [2023-11-28 23:58:24,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-28 23:58:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:58:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-28 23:58:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1187, Unknown=2, NotChecked=0, Total=1332 [2023-11-28 23:58:24,234 INFO L87 Difference]: Start difference. First operand 153 states and 166 transitions. Second operand has 37 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 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) [2023-11-28 23:58:32,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:58:37,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-28 23:58:53,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 23:58:58,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 23:59:02,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 23:59:18,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.86s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 23:59:45,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:00:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:00:01,071 INFO L93 Difference]: Finished difference Result 266 states and 292 transitions. [2023-11-29 00:00:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 00:00:01,071 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 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 58 [2023-11-29 00:00:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:00:01,073 INFO L225 Difference]: With dead ends: 266 [2023-11-29 00:00:01,073 INFO L226 Difference]: Without dead ends: 232 [2023-11-29 00:00:01,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3415 ImplicationChecksByTransitivity, 79.2s TimeCoverageRelationStatistics Valid=1564, Invalid=10192, Unknown=16, NotChecked=0, Total=11772 [2023-11-29 00:00:01,074 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 383 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 148 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:00:01,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 310 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1781 Invalid, 6 Unknown, 0 Unchecked, 25.9s Time] [2023-11-29 00:00:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-29 00:00:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 158. [2023-11-29 00:00:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0828025477707006) internal successors, (170), 157 states have internal predecessors, (170), 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 00:00:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 170 transitions. [2023-11-29 00:00:01,116 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 170 transitions. Word has length 58 [2023-11-29 00:00:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:00:01,116 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 170 transitions. [2023-11-29 00:00:01,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 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 00:00:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 170 transitions. [2023-11-29 00:00:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 00:00:01,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:00:01,116 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:00:01,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:00:01,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:00:01,317 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:00:01,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:00:01,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1899014413, now seen corresponding path program 6 times [2023-11-29 00:00:01,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:00:01,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34570961] [2023-11-29 00:00:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:00:01,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:00:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:00:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:01,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:00:01,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34570961] [2023-11-29 00:00:01,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34570961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:00:01,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635605349] [2023-11-29 00:00:01,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:00:01,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:00:01,678 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:00:01,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:00:01,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 00:00:01,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:00:01,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 00:00:01,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:00:01,834 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 00:00:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:02,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:00:02,122 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 17 treesize of output 15 [2023-11-29 00:00:02,124 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 16 treesize of output 12 [2023-11-29 00:00:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:02,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635605349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:00:02,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:00:02,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 26 [2023-11-29 00:00:02,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205675223] [2023-11-29 00:00:02,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:00:02,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:00:02,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:00:02,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:00:02,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:00:02,140 INFO L87 Difference]: Start difference. First operand 158 states and 170 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 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 00:00:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:00:05,328 INFO L93 Difference]: Finished difference Result 401 states and 438 transitions. [2023-11-29 00:00:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-11-29 00:00:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 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 63 [2023-11-29 00:00:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:00:05,331 INFO L225 Difference]: With dead ends: 401 [2023-11-29 00:00:05,331 INFO L226 Difference]: Without dead ends: 399 [2023-11-29 00:00:05,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8068 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1500, Invalid=19962, Unknown=0, NotChecked=0, Total=21462 [2023-11-29 00:00:05,333 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 177 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 2428 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 2428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:00:05,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 352 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 2428 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 00:00:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-11-29 00:00:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 168. [2023-11-29 00:00:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0838323353293413) internal successors, (181), 167 states have internal predecessors, (181), 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 00:00:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2023-11-29 00:00:05,370 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 63 [2023-11-29 00:00:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:00:05,371 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2023-11-29 00:00:05,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 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 00:00:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2023-11-29 00:00:05,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 00:00:05,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:00:05,371 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:00:05,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:00:05,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:05,572 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:00:05,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:00:05,572 INFO L85 PathProgramCache]: Analyzing trace with hash 116303038, now seen corresponding path program 8 times [2023-11-29 00:00:05,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:00:05,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53157990] [2023-11-29 00:00:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:00:05,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:00:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:00:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 14 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:06,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:00:06,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53157990] [2023-11-29 00:00:06,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53157990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:00:06,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275537570] [2023-11-29 00:00:06,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:00:06,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:06,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:00:06,142 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:00:06,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:00:06,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:00:06,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:00:06,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 00:00:06,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:00:06,440 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 00:00:06,526 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 00:00:06,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:00:06,534 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 23 treesize of output 22 [2023-11-29 00:00:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 14 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:07,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:00:08,289 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 53 treesize of output 49 [2023-11-29 00:00:08,292 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 99 treesize of output 91 [2023-11-29 00:00:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:08,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275537570] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:00:08,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:00:08,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 23] total 61 [2023-11-29 00:00:08,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406991816] [2023-11-29 00:00:08,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:00:08,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 00:00:08,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:00:08,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 00:00:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=3363, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 00:00:08,587 INFO L87 Difference]: Start difference. First operand 168 states and 181 transitions. Second operand has 61 states, 61 states have (on average 3.19672131147541) internal successors, (195), 61 states have internal predecessors, (195), 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 00:00:20,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:00:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:00:35,310 INFO L93 Difference]: Finished difference Result 232 states and 250 transitions. [2023-11-29 00:00:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 00:00:35,310 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.19672131147541) internal successors, (195), 61 states have internal predecessors, (195), 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 67 [2023-11-29 00:00:35,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:00:35,311 INFO L225 Difference]: With dead ends: 232 [2023-11-29 00:00:35,312 INFO L226 Difference]: Without dead ends: 223 [2023-11-29 00:00:35,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1117, Invalid=10432, Unknown=7, NotChecked=0, Total=11556 [2023-11-29 00:00:35,313 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 233 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 100 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:00:35,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 414 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2153 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2023-11-29 00:00:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-29 00:00:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 173. [2023-11-29 00:00:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0813953488372092) internal successors, (186), 172 states have internal predecessors, (186), 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 00:00:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 186 transitions. [2023-11-29 00:00:35,351 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 186 transitions. Word has length 67 [2023-11-29 00:00:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:00:35,351 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 186 transitions. [2023-11-29 00:00:35,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.19672131147541) internal successors, (195), 61 states have internal predecessors, (195), 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 00:00:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 186 transitions. [2023-11-29 00:00:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 00:00:35,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:00:35,352 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:00:35,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:00:35,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:35,553 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:00:35,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:00:35,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1228720697, now seen corresponding path program 7 times [2023-11-29 00:00:35,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:00:35,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649851986] [2023-11-29 00:00:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:00:35,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:00:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:00:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 136 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:36,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:00:36,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649851986] [2023-11-29 00:00:36,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649851986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:00:36,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390633514] [2023-11-29 00:00:36,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:00:36,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:36,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:00:36,114 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:00:36,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:00:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:00:36,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:00:36,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:00:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:36,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:00:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 172 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:37,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390633514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:00:37,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:00:37,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2023-11-29 00:00:37,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99169516] [2023-11-29 00:00:37,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:00:37,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:00:37,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:00:37,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:00:37,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=1955, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:00:37,250 INFO L87 Difference]: Start difference. First operand 173 states and 186 transitions. Second operand has 51 states, 51 states have (on average 3.784313725490196) internal successors, (193), 51 states have internal predecessors, (193), 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 00:00:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:00:37,711 INFO L93 Difference]: Finished difference Result 274 states and 297 transitions. [2023-11-29 00:00:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:00:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.784313725490196) internal successors, (193), 51 states have internal predecessors, (193), 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 00:00:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:00:37,712 INFO L225 Difference]: With dead ends: 274 [2023-11-29 00:00:37,713 INFO L226 Difference]: Without dead ends: 190 [2023-11-29 00:00:37,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=859, Invalid=2681, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 00:00:37,714 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:00:37,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 217 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:00:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-29 00:00:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2023-11-29 00:00:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0777777777777777) internal successors, (194), 180 states have internal predecessors, (194), 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 00:00:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 194 transitions. [2023-11-29 00:00:37,755 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 194 transitions. Word has length 68 [2023-11-29 00:00:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:00:37,755 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 194 transitions. [2023-11-29 00:00:37,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.784313725490196) internal successors, (193), 51 states have internal predecessors, (193), 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 00:00:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 194 transitions. [2023-11-29 00:00:37,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 00:00:37,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:00:37,756 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:00:37,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:00:37,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:00:37,957 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:00:37,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:00:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1074623784, now seen corresponding path program 9 times [2023-11-29 00:00:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:00:37,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347645417] [2023-11-29 00:00:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:00:37,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:00:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:00:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:00:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347645417] [2023-11-29 00:00:38,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347645417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:00:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853238013] [2023-11-29 00:00:38,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:00:38,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:38,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:00:38,530 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:00:38,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:00:38,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 00:00:38,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:00:38,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 00:00:38,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:00:38,990 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 19 treesize of output 1 [2023-11-29 00:00:39,017 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 23 treesize of output 22 [2023-11-29 00:00:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:39,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:00:40,048 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 27 treesize of output 25 [2023-11-29 00:00:40,050 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 00:00:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 16 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:40,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853238013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:00:40,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:00:40,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 57 [2023-11-29 00:00:40,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611207696] [2023-11-29 00:00:40,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:00:40,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 00:00:40,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:00:40,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 00:00:40,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2966, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 00:00:40,297 INFO L87 Difference]: Start difference. First operand 181 states and 194 transitions. Second operand has 57 states, 57 states have (on average 3.6315789473684212) internal successors, (207), 57 states have internal predecessors, (207), 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 00:00:48,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:00:48,360 INFO L93 Difference]: Finished difference Result 398 states and 429 transitions. [2023-11-29 00:00:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-11-29 00:00:48,360 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.6315789473684212) internal successors, (207), 57 states have internal predecessors, (207), 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 72 [2023-11-29 00:00:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:00:48,362 INFO L225 Difference]: With dead ends: 398 [2023-11-29 00:00:48,362 INFO L226 Difference]: Without dead ends: 389 [2023-11-29 00:00:48,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7869 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2679, Invalid=25713, Unknown=0, NotChecked=0, Total=28392 [2023-11-29 00:00:48,364 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 660 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 3139 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 3139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:00:48,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 837 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 3139 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 00:00:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-29 00:00:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 196. [2023-11-29 00:00:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0769230769230769) internal successors, (210), 195 states have internal predecessors, (210), 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 00:00:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 210 transitions. [2023-11-29 00:00:48,411 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 210 transitions. Word has length 72 [2023-11-29 00:00:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:00:48,412 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 210 transitions. [2023-11-29 00:00:48,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.6315789473684212) internal successors, (207), 57 states have internal predecessors, (207), 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 00:00:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 210 transitions. [2023-11-29 00:00:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 00:00:48,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:00:48,413 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:00:48,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:00:48,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 00:00:48,613 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:00:48,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:00:48,614 INFO L85 PathProgramCache]: Analyzing trace with hash -934158362, now seen corresponding path program 4 times [2023-11-29 00:00:48,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:00:48,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297437751] [2023-11-29 00:00:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:00:48,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:00:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:00:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:49,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:00:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297437751] [2023-11-29 00:00:49,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297437751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:00:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680567754] [2023-11-29 00:00:49,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:00:49,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:49,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:00:49,019 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:00:49,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:00:49,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:00:49,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:00:49,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 00:00:49,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:00:49,135 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 00:00:49,140 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 29 treesize of output 13 [2023-11-29 00:00:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:49,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:00:49,628 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 17 treesize of output 15 [2023-11-29 00:00:49,629 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 16 treesize of output 12 [2023-11-29 00:00:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:49,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680567754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:00:49,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:00:49,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 33 [2023-11-29 00:00:49,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921062750] [2023-11-29 00:00:49,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:00:49,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 00:00:49,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:00:49,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 00:00:49,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:00:49,649 INFO L87 Difference]: Start difference. First operand 196 states and 210 transitions. Second operand has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 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 00:00:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:00:53,008 INFO L93 Difference]: Finished difference Result 404 states and 440 transitions. [2023-11-29 00:00:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-11-29 00:00:53,008 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 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 72 [2023-11-29 00:00:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:00:53,010 INFO L225 Difference]: With dead ends: 404 [2023-11-29 00:00:53,010 INFO L226 Difference]: Without dead ends: 402 [2023-11-29 00:00:53,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6851 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1390, Invalid=18070, Unknown=0, NotChecked=0, Total=19460 [2023-11-29 00:00:53,012 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 214 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 2615 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:00:53,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 382 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2615 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 00:00:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-29 00:00:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 201. [2023-11-29 00:00:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.08) internal successors, (216), 200 states have internal predecessors, (216), 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 00:00:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 216 transitions. [2023-11-29 00:00:53,068 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 216 transitions. Word has length 72 [2023-11-29 00:00:53,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:00:53,068 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 216 transitions. [2023-11-29 00:00:53,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 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 00:00:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 216 transitions. [2023-11-29 00:00:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-29 00:00:53,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:00:53,069 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:00:53,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:00:53,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 00:00:53,270 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:00:53,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:00:53,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1665356018, now seen corresponding path program 8 times [2023-11-29 00:00:53,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:00:53,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664106005] [2023-11-29 00:00:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:00:53,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:00:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:00:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:53,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:00:53,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664106005] [2023-11-29 00:00:53,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664106005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:00:53,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350547308] [2023-11-29 00:00:53,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:00:53,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:00:53,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:00:53,726 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:00:53,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:00:53,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:00:53,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:00:53,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 00:00:53,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:00:53,987 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 00:00:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:54,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:00:54,557 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 17 treesize of output 15 [2023-11-29 00:00:54,559 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 16 treesize of output 12 [2023-11-29 00:00:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:00:54,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350547308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:00:54,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:00:54,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 40 [2023-11-29 00:00:54,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516513581] [2023-11-29 00:00:54,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:00:54,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 00:00:54,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:00:54,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 00:00:54,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1413, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 00:00:54,579 INFO L87 Difference]: Start difference. First operand 201 states and 216 transitions. Second operand has 40 states, 40 states have (on average 4.0) internal successors, (160), 40 states have internal predecessors, (160), 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 00:01:00,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:01:00,334 INFO L93 Difference]: Finished difference Result 553 states and 605 transitions. [2023-11-29 00:01:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2023-11-29 00:01:00,334 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.0) internal successors, (160), 40 states have internal predecessors, (160), 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 77 [2023-11-29 00:01:00,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:01:00,336 INFO L225 Difference]: With dead ends: 553 [2023-11-29 00:01:00,336 INFO L226 Difference]: Without dead ends: 551 [2023-11-29 00:01:00,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18947 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3068, Invalid=45112, Unknown=0, NotChecked=0, Total=48180 [2023-11-29 00:01:00,339 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 317 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 4420 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 4715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 4420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:01:00,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 702 Invalid, 4715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 4420 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 00:01:00,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-11-29 00:01:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 211. [2023-11-29 00:01:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0809523809523809) internal successors, (227), 210 states have internal predecessors, (227), 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 00:01:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 227 transitions. [2023-11-29 00:01:00,395 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 227 transitions. Word has length 77 [2023-11-29 00:01:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:01:00,395 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 227 transitions. [2023-11-29 00:01:00,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.0) internal successors, (160), 40 states have internal predecessors, (160), 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 00:01:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 227 transitions. [2023-11-29 00:01:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-29 00:01:00,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:01:00,396 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:01:00,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:01:00,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 00:01:00,597 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:01:00,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash 304032488, now seen corresponding path program 10 times [2023-11-29 00:01:00,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:00,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71652924] [2023-11-29 00:01:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:00,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 219 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:01,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:01,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71652924] [2023-11-29 00:01:01,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71652924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:01,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79484647] [2023-11-29 00:01:01,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:01:01,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:01,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:01,285 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:01,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:01:01,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:01:01,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:01:01,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:01:01,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 265 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:02,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 265 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:02,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79484647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:02,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:02,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 60 [2023-11-29 00:01:02,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225825792] [2023-11-29 00:01:02,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:02,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 00:01:02,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 00:01:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 00:01:02,635 INFO L87 Difference]: Start difference. First operand 211 states and 227 transitions. Second operand has 60 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 60 states have internal predecessors, (235), 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 00:01:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:01:03,491 INFO L93 Difference]: Finished difference Result 384 states and 414 transitions. [2023-11-29 00:01:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:01:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 60 states have internal predecessors, (235), 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 82 [2023-11-29 00:01:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:01:03,493 INFO L225 Difference]: With dead ends: 384 [2023-11-29 00:01:03,493 INFO L226 Difference]: Without dead ends: 232 [2023-11-29 00:01:03,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1406, Invalid=5074, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 00:01:03,494 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 468 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:01:03,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 278 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:01:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-29 00:01:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 223. [2023-11-29 00:01:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0765765765765767) internal successors, (239), 222 states have internal predecessors, (239), 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 00:01:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 239 transitions. [2023-11-29 00:01:03,556 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 239 transitions. Word has length 82 [2023-11-29 00:01:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:01:03,556 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 239 transitions. [2023-11-29 00:01:03,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 60 states have internal predecessors, (235), 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 00:01:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 239 transitions. [2023-11-29 00:01:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-29 00:01:03,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:01:03,557 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:01:03,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:01:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:03,758 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:01:03,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:03,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1029421985, now seen corresponding path program 11 times [2023-11-29 00:01:03,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:03,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6965463] [2023-11-29 00:01:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:03,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:04,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:04,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6965463] [2023-11-29 00:01:04,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6965463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:04,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399759672] [2023-11-29 00:01:04,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:01:04,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:04,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:04,426 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:04,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:01:04,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-29 00:01:04,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:01:04,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 00:01:04,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:04,763 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 00:01:04,843 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 19 treesize of output 18 [2023-11-29 00:01:04,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:04,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 00:01:05,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:05,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-29 00:01:05,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:05,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 00:01:05,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:05,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 58 [2023-11-29 00:01:05,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:05,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 68 [2023-11-29 00:01:07,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:07,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 84 treesize of output 28 [2023-11-29 00:01:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:07,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:01:09,158 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 127 treesize of output 123 [2023-11-29 00:01:09,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:09,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2006 treesize of output 1910 [2023-11-29 00:01:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:09,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399759672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:01:09,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:01:09,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 30, 30] total 79 [2023-11-29 00:01:09,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351060343] [2023-11-29 00:01:09,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:01:09,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-29 00:01:09,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:01:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-29 00:01:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=5753, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 00:01:09,449 INFO L87 Difference]: Start difference. First operand 223 states and 239 transitions. Second operand has 79 states, 79 states have (on average 3.1392405063291138) internal successors, (248), 79 states have internal predecessors, (248), 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 00:01:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:01:36,629 INFO L93 Difference]: Finished difference Result 509 states and 548 transitions. [2023-11-29 00:01:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-11-29 00:01:36,630 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.1392405063291138) internal successors, (248), 79 states have internal predecessors, (248), 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 86 [2023-11-29 00:01:36,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:01:36,631 INFO L225 Difference]: With dead ends: 509 [2023-11-29 00:01:36,631 INFO L226 Difference]: Without dead ends: 500 [2023-11-29 00:01:36,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10965 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=4516, Invalid=37304, Unknown=0, NotChecked=0, Total=41820 [2023-11-29 00:01:36,634 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1700 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 5206 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 5900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 5206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:01:36,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 1212 Invalid, 5900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 5206 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-11-29 00:01:36,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2023-11-29 00:01:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 254. [2023-11-29 00:01:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.0869565217391304) internal successors, (275), 253 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 00:01:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 275 transitions. [2023-11-29 00:01:36,751 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 275 transitions. Word has length 86 [2023-11-29 00:01:36,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:01:36,751 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 275 transitions. [2023-11-29 00:01:36,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.1392405063291138) internal successors, (248), 79 states have internal predecessors, (248), 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 00:01:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 275 transitions. [2023-11-29 00:01:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-29 00:01:36,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:01:36,753 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 9, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:01:36,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 00:01:36,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:36,953 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:01:36,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:01:36,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1945198929, now seen corresponding path program 9 times [2023-11-29 00:01:36,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:01:36,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059176249] [2023-11-29 00:01:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:01:36,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:01:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:01:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 20 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:01:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:01:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059176249] [2023-11-29 00:01:37,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059176249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:01:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608383212] [2023-11-29 00:01:37,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:01:37,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:01:37,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:01:37,574 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:01:37,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b2e9440-1298-4bcf-81c8-7e1368fc7f15/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:01:37,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 00:01:37,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:01:38,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 00:01:38,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:01:38,076 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 00:01:38,143 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 23 treesize of output 22 [2023-11-29 00:01:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:38,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2023-11-29 00:01:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:38,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2023-11-29 00:01:38,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:38,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2023-11-29 00:01:38,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:38,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2023-11-29 00:01:38,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:38,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:38,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 53 [2023-11-29 00:01:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:41,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:41,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:41,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:41,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:41,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:41,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:41,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 64 [2023-11-29 00:01:42,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:42,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:42,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:42,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:42,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:42,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:42,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:42,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:42,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 67 [2023-11-29 00:01:48,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:48,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:48,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:48,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:48,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:48,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:48,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:48,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 75 [2023-11-29 00:01:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:55,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:55,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 78 [2023-11-29 00:01:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:56,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:56,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:01:56,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:01:56,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 19 [2023-11-29 00:01:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 97 proven. 36 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-11-29 00:01:56,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:03:08,969 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_482| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_482| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_479| Int) (v_ArrVal_919 Int) (v_ArrVal_916 Int) (|v_ULTIMATE.start_main_~i~0#1_481| Int) (v_ArrVal_910 Int)) (or (< (select (store (let ((.cse1 (* 8 |v_ULTIMATE.start_main_~i~0#1_481|))) (store (store (let ((.cse0 (* 8 |v_ULTIMATE.start_main_~i~0#1_482|))) (store (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (- 8)) |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (+ (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0) v_ArrVal_910)) (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (+ (- 4) .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_916)) (+ (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 8 |v_ULTIMATE.start_main_~i~0#1_479|)) v_ArrVal_919) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) (+ |c_ULTIMATE.start_main_~CCCELVOL1~0#1| 1)) (< |v_ULTIMATE.start_main_~i~0#1_479| (+ |v_ULTIMATE.start_main_~i~0#1_481| 1)) (< |v_ULTIMATE.start_main_~i~0#1_481| (+ |v_ULTIMATE.start_main_~i~0#1_482| 1)))))) is different from false [2023-11-29 00:04:42,477 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 67 treesize of output 65 [2023-11-29 00:04:42,482 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 474 treesize of output 470 [2023-11-29 00:04:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 80 proven. 39 refuted. 7 times theorem prover too weak. 200 trivial. 5 not checked. [2023-11-29 00:04:42,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608383212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:04:42,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:04:42,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 57 [2023-11-29 00:04:42,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941283532] [2023-11-29 00:04:42,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:04:42,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 00:04:42,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:04:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 00:04:42,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2709, Unknown=63, NotChecked=108, Total=3192 [2023-11-29 00:04:42,802 INFO L87 Difference]: Start difference. First operand 254 states and 275 transitions. Second operand has 57 states, 57 states have (on average 2.8596491228070176) internal successors, (163), 57 states have internal predecessors, (163), 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 00:04:44,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:04:45,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:04:46,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:04:47,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:04:52,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:04:53,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:04:55,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:04:57,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:05:00,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:05:04,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.94s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:05:21,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:24,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:27,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:29,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:05:31,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:34,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:35,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:38,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:40,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:44,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:47,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:50,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.71s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:05:52,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:55,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:57,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:05:59,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:06:02,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:06:05,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:06:08,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:06:10,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:06:15,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:06:17,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:06:21,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:06:25,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:07:08,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:07:11,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.67s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:07:13,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:07:16,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 00:07:18,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:07:22,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:07:25,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:07:29,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:07:32,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:07:35,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:07:38,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.85s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:07:40,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:08:32,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.93s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:08:36,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:08:38,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:08:46,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:09:04,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:09:16,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:10:04,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:11:21,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]