./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rew.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rew.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx --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 a4dbd52ad78119a422ea606f98f820bbe5495fb5a7cf8886c665da2d1f9b569e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:12:57,890 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:12:58,003 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:12:58,014 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:12:58,015 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:12:58,058 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:12:58,059 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:12:58,060 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:12:58,061 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:12:58,066 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:12:58,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:12:58,068 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:12:58,068 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:12:58,070 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:12:58,071 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:12:58,071 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:12:58,072 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:12:58,072 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:12:58,073 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:12:58,073 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:12:58,075 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:12:58,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:12:58,076 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:12:58,076 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:12:58,077 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:12:58,077 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:12:58,078 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:12:58,079 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:12:58,079 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:12:58,079 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:12:58,081 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:12:58,081 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:12:58,081 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:12:58,082 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:12:58,082 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:12:58,082 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:12:58,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:12:58,083 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:12:58,083 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:12:58,083 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:12:58,084 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:12:58,084 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:12:58,084 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_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4dbd52ad78119a422ea606f98f820bbe5495fb5a7cf8886c665da2d1f9b569e [2023-11-21 22:12:58,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:12:58,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:12:58,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:12:58,420 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:12:58,420 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:12:58,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/array-tiling/rew.c [2023-11-21 22:13:01,653 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:13:01,881 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:13:01,881 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/sv-benchmarks/c/array-tiling/rew.c [2023-11-21 22:13:01,891 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/data/7dd2151f6/b14ccc0293d94590b8c3e24669ac3e57/FLAG96ebbec82 [2023-11-21 22:13:01,910 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/data/7dd2151f6/b14ccc0293d94590b8c3e24669ac3e57 [2023-11-21 22:13:01,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:13:01,916 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:13:01,918 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:13:01,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:13:01,925 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:13:01,926 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:13:01" (1/1) ... [2023-11-21 22:13:01,928 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@661450c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:01, skipping insertion in model container [2023-11-21 22:13:01,929 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:13:01" (1/1) ... [2023-11-21 22:13:01,955 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:13:02,181 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_bc627497-0f7c-47c6-b803-4b4e859274da/sv-benchmarks/c/array-tiling/rew.c[394,407] [2023-11-21 22:13:02,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:13:02,219 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:13:02,241 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_bc627497-0f7c-47c6-b803-4b4e859274da/sv-benchmarks/c/array-tiling/rew.c[394,407] [2023-11-21 22:13:02,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:13:02,294 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:13:02,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02 WrapperNode [2023-11-21 22:13:02,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:13:02,297 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:13:02,297 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:13:02,297 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:13:02,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,359 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-11-21 22:13:02,360 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:13:02,361 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:13:02,361 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:13:02,362 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:13:02,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,375 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,377 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,399 INFO L187 HeapSplitter]: Split 11 memory accesses to 3 slices as follows [2, 6, 3] [2023-11-21 22:13:02,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,400 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,405 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,409 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,412 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,415 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:13:02,416 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:13:02,416 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:13:02,417 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:13:02,418 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (1/1) ... [2023-11-21 22:13:02,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:13:02,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:02,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:13:02,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:13:02,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:13:02,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:13:02,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:13:02,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 22:13:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:13:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:13:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-21 22:13:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:13:02,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:13:02,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:13:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 22:13:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 22:13:02,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-21 22:13:02,598 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:13:02,600 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:13:02,807 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:13:02,882 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:13:02,883 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 22:13:02,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:13:02 BoogieIcfgContainer [2023-11-21 22:13:02,885 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:13:02,889 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:13:02,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:13:02,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:13:02,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:13:01" (1/3) ... [2023-11-21 22:13:02,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d264e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:13:02, skipping insertion in model container [2023-11-21 22:13:02,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:13:02" (2/3) ... [2023-11-21 22:13:02,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d264e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:13:02, skipping insertion in model container [2023-11-21 22:13:02,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:13:02" (3/3) ... [2023-11-21 22:13:02,900 INFO L112 eAbstractionObserver]: Analyzing ICFG rew.c [2023-11-21 22:13:02,919 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:13:02,919 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:13:02,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:13:02,984 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;@1613ec7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:13:02,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:13:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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) [2023-11-21 22:13:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:13:02,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:02,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:13:02,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:03,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:03,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1654527315, now seen corresponding path program 1 times [2023-11-21 22:13:03,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:03,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104684603] [2023-11-21 22:13:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:03,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:03,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104684603] [2023-11-21 22:13:03,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104684603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:13:03,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:13:03,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:13:03,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297386373] [2023-11-21 22:13:03,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:13:03,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:13:03,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:03,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:13:03,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:13:03,618 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-21 22:13:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:03,691 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2023-11-21 22:13:03,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:13:03,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-11-21 22:13:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:03,702 INFO L225 Difference]: With dead ends: 18 [2023-11-21 22:13:03,703 INFO L226 Difference]: Without dead ends: 9 [2023-11-21 22:13:03,707 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 [2023-11-21 22:13:03,713 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:03,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-21 22:13:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-21 22:13:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2023-11-21 22:13:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-11-21 22:13:03,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2023-11-21 22:13:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:03,755 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-11-21 22:13:03,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-21 22:13:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-11-21 22:13:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:13:03,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:03,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:13:03,758 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:03,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash 252922174, now seen corresponding path program 1 times [2023-11-21 22:13:03,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468230514] [2023-11-21 22:13:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:03,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:03,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:03,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468230514] [2023-11-21 22:13:03,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468230514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066441751] [2023-11-21 22:13:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:03,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:03,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:03,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:04,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:13:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:04,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:13:04,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:04,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:04,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066441751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:04,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:04,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-21 22:13:04,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012067998] [2023-11-21 22:13:04,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:04,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:13:04,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:13:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:13:04,278 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2023-11-21 22:13:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:04,315 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2023-11-21 22:13:04,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:13:04,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 7 [2023-11-21 22:13:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:04,317 INFO L225 Difference]: With dead ends: 15 [2023-11-21 22:13:04,317 INFO L226 Difference]: Without dead ends: 10 [2023-11-21 22:13:04,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:13:04,319 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:04,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:13:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-21 22:13:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-21 22:13:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2023-11-21 22:13:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-11-21 22:13:04,329 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-11-21 22:13:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:04,330 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-11-21 22:13:04,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2023-11-21 22:13:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-11-21 22:13:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:13:04,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:04,332 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:04,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:04,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:04,549 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:04,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash -745685811, now seen corresponding path program 2 times [2023-11-21 22:13:04,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:04,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869048445] [2023-11-21 22:13:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:04,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:05,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:05,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869048445] [2023-11-21 22:13:05,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869048445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:05,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846604433] [2023-11-21 22:13:05,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:13:05,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:05,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:05,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:05,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:13:05,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:13:05,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:05,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 22:13:05,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:05,516 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 [2023-11-21 22:13:05,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 20 [2023-11-21 22:13:05,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2023-11-21 22:13:05,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:05,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 32 [2023-11-21 22:13:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:05,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-21 22:13:05,750 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 16 treesize of output 5 [2023-11-21 22:13:05,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:05,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:13:05,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2023-11-21 22:13:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:06,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:06,163 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 23 treesize of output 21 [2023-11-21 22:13:06,172 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 [2023-11-21 22:13:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:06,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846604433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:06,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:06,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-21 22:13:06,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982154945] [2023-11-21 22:13:06,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:06,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:13:06,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:13:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:13:06,256 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-11-21 22:13:08,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:13:11,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:13:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:11,064 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2023-11-21 22:13:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:13:11,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 8 [2023-11-21 22:13:11,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:11,065 INFO L225 Difference]: With dead ends: 20 [2023-11-21 22:13:11,065 INFO L226 Difference]: Without dead ends: 18 [2023-11-21 22:13:11,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:13:11,067 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:11,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 70 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2023-11-21 22:13:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-21 22:13:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2023-11-21 22:13:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2023-11-21 22:13:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-21 22:13:11,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-11-21 22:13:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:11,074 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-21 22:13:11,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-11-21 22:13:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-21 22:13:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:13:11,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:11,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:11,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:11,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:11,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:11,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:11,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1149863513, now seen corresponding path program 1 times [2023-11-21 22:13:11,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:11,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064391541] [2023-11-21 22:13:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:11,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:11,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:11,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064391541] [2023-11-21 22:13:11,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064391541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:11,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512164659] [2023-11-21 22:13:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:11,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:11,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:11,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:11,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:13:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:11,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 22:13:11,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:11,829 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 [2023-11-21 22:13:11,952 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 [2023-11-21 22:13:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:11,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:12,076 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 18 treesize of output 16 [2023-11-21 22:13:12,081 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 [2023-11-21 22:13:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:12,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512164659] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:12,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:12,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-21 22:13:12,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414692680] [2023-11-21 22:13:12,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:12,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:13:12,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:13:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:13:12,142 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2023-11-21 22:13:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:12,352 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2023-11-21 22:13:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:13:12,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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 11 [2023-11-21 22:13:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:12,353 INFO L225 Difference]: With dead ends: 26 [2023-11-21 22:13:12,353 INFO L226 Difference]: Without dead ends: 24 [2023-11-21 22:13:12,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:13:12,355 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:12,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-21 22:13:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2023-11-21 22:13:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2023-11-21 22:13:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-21 22:13:12,364 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2023-11-21 22:13:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:12,365 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-21 22:13:12,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2023-11-21 22:13:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-21 22:13:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 22:13:12,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:12,366 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:12,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:12,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:12,588 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:12,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:12,588 INFO L85 PathProgramCache]: Analyzing trace with hash 257854902, now seen corresponding path program 2 times [2023-11-21 22:13:12,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:12,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470695345] [2023-11-21 22:13:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:12,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:13,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:13,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470695345] [2023-11-21 22:13:13,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470695345] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:13,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853217092] [2023-11-21 22:13:13,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:13:13,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:13,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:13,187 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:13,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:13:13,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:13:13,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:13,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-21 22:13:13,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:13,368 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 [2023-11-21 22:13:13,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 20 [2023-11-21 22:13:13,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 50 [2023-11-21 22:13:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:13,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 26 [2023-11-21 22:13:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:13,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2023-11-21 22:13:13,600 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 16 treesize of output 5 [2023-11-21 22:13:13,808 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 [2023-11-21 22:13:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:13,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:14,088 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 [2023-11-21 22:13:14,097 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 118 treesize of output 110 [2023-11-21 22:13:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:14,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853217092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:14,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:14,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-21 22:13:14,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762362617] [2023-11-21 22:13:14,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:14,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-21 22:13:14,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:14,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-21 22:13:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:13:14,198 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 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) [2023-11-21 22:13:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:14,562 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2023-11-21 22:13:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:13:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-21 22:13:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:14,564 INFO L225 Difference]: With dead ends: 24 [2023-11-21 22:13:14,564 INFO L226 Difference]: Without dead ends: 22 [2023-11-21 22:13:14,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2023-11-21 22:13:14,566 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:14,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:13:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-21 22:13:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2023-11-21 22:13:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2023-11-21 22:13:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-21 22:13:14,576 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2023-11-21 22:13:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:14,576 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-21 22:13:14,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 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) [2023-11-21 22:13:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-21 22:13:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 22:13:14,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:14,578 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-21 22:13:14,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:14,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:14,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:14,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1080514189, now seen corresponding path program 3 times [2023-11-21 22:13:14,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:14,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924557419] [2023-11-21 22:13:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:14,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:14,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924557419] [2023-11-21 22:13:14,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924557419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:14,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985340077] [2023-11-21 22:13:14,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:13:14,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:14,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:14,952 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:14,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:13:15,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-21 22:13:15,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:15,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:13:15,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:15,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:15,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985340077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:15,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:15,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-21 22:13:15,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429814757] [2023-11-21 22:13:15,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:15,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:13:15,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:15,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:13:15,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:13:15,243 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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) [2023-11-21 22:13:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:15,327 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-11-21 22:13:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:13:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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 14 [2023-11-21 22:13:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:15,329 INFO L225 Difference]: With dead ends: 34 [2023-11-21 22:13:15,329 INFO L226 Difference]: Without dead ends: 22 [2023-11-21 22:13:15,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:13:15,330 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:15,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 23 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-21 22:13:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2023-11-21 22:13:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2023-11-21 22:13:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-11-21 22:13:15,339 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2023-11-21 22:13:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:15,339 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-11-21 22:13:15,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 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) [2023-11-21 22:13:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-11-21 22:13:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:13:15,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:15,341 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-21 22:13:15,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:15,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:15,557 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:15,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:15,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1935829986, now seen corresponding path program 4 times [2023-11-21 22:13:15,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:15,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945583706] [2023-11-21 22:13:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:15,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:16,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:16,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945583706] [2023-11-21 22:13:16,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945583706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:16,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292822398] [2023-11-21 22:13:16,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:13:16,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:16,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:16,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:16,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:13:16,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:13:16,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:16,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 22:13:16,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:16,266 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 23 treesize of output 1 [2023-11-21 22:13:16,670 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:13:16,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 10 [2023-11-21 22:13:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:16,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:17,056 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 20 treesize of output 18 [2023-11-21 22:13:17,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-21 22:13:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:17,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292822398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:17,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:17,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-11-21 22:13:17,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887964398] [2023-11-21 22:13:17,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:17,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 22:13:17,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:17,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 22:13:17,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:13:17,268 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 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) [2023-11-21 22:13:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:18,234 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-11-21 22:13:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-21 22:13:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:13:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:18,236 INFO L225 Difference]: With dead ends: 30 [2023-11-21 22:13:18,236 INFO L226 Difference]: Without dead ends: 18 [2023-11-21 22:13:18,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2023-11-21 22:13:18,238 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:18,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 55 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:13:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-21 22:13:18,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-11-21 22:13:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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) [2023-11-21 22:13:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-21 22:13:18,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-11-21 22:13:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:18,249 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-21 22:13:18,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 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) [2023-11-21 22:13:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-21 22:13:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 22:13:18,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:18,251 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-21 22:13:18,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:18,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:18,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:18,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash -953218899, now seen corresponding path program 5 times [2023-11-21 22:13:18,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:18,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081774246] [2023-11-21 22:13:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:18,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:19,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:19,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081774246] [2023-11-21 22:13:19,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081774246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:19,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100943858] [2023-11-21 22:13:19,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:13:19,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:19,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:19,018 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:19,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:13:19,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-21 22:13:19,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:19,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-21 22:13:19,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:19,218 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 [2023-11-21 22:13:19,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 18 [2023-11-21 22:13:19,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2023-11-21 22:13:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:19,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 42 [2023-11-21 22:13:19,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:19,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2023-11-21 22:13:19,390 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 16 treesize of output 5 [2023-11-21 22:13:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:19,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:13:19,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2023-11-21 22:13:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:19,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:20,073 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 [2023-11-21 22:13:20,077 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 [2023-11-21 22:13:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:20,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100943858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:20,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:20,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-11-21 22:13:20,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804126159] [2023-11-21 22:13:20,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:20,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-21 22:13:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-21 22:13:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-11-21 22:13:20,204 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 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) [2023-11-21 22:13:22,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 22:13:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:22,268 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-11-21 22:13:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:13:22,277 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 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) Word has length 16 [2023-11-21 22:13:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:22,278 INFO L225 Difference]: With dead ends: 28 [2023-11-21 22:13:22,278 INFO L226 Difference]: Without dead ends: 26 [2023-11-21 22:13:22,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2023-11-21 22:13:22,283 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 71 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:22,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 61 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 1.5s Time] [2023-11-21 22:13:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-21 22:13:22,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2023-11-21 22:13:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2023-11-21 22:13:22,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-11-21 22:13:22,305 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2023-11-21 22:13:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:22,306 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-11-21 22:13:22,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 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) [2023-11-21 22:13:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-11-21 22:13:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 22:13:22,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:22,308 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1] [2023-11-21 22:13:22,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:22,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:22,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:22,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash 984818119, now seen corresponding path program 6 times [2023-11-21 22:13:22,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:22,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206003834] [2023-11-21 22:13:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:22,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:23,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:23,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206003834] [2023-11-21 22:13:23,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206003834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:23,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34930409] [2023-11-21 22:13:23,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 22:13:23,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:23,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:23,154 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:23,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:13:23,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-21 22:13:23,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:23,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-21 22:13:23,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:23,397 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 [2023-11-21 22:13:23,644 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 [2023-11-21 22:13:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:23,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:23,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-21 22:13:23,919 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 [2023-11-21 22:13:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:24,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34930409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:24,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:24,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2023-11-21 22:13:24,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757897941] [2023-11-21 22:13:24,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:24,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-21 22:13:24,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-21 22:13:24,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2023-11-21 22:13:24,071 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 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) [2023-11-21 22:13:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:24,582 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-11-21 22:13:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:13:24,583 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 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 19 [2023-11-21 22:13:24,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:24,583 INFO L225 Difference]: With dead ends: 40 [2023-11-21 22:13:24,583 INFO L226 Difference]: Without dead ends: 38 [2023-11-21 22:13:24,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2023-11-21 22:13:24,585 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:24,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 114 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:13:24,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-21 22:13:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2023-11-21 22:13:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-11-21 22:13:24,599 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2023-11-21 22:13:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:24,599 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-11-21 22:13:24,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 states have internal predecessors, (52), 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) [2023-11-21 22:13:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-11-21 22:13:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 22:13:24,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:24,600 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1] [2023-11-21 22:13:24,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:24,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:24,820 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:24,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:24,821 INFO L85 PathProgramCache]: Analyzing trace with hash 793360086, now seen corresponding path program 7 times [2023-11-21 22:13:24,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:24,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540250628] [2023-11-21 22:13:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:24,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:25,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:25,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540250628] [2023-11-21 22:13:25,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540250628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:25,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438394963] [2023-11-21 22:13:25,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 22:13:25,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:25,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:25,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:25,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:13:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:25,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-21 22:13:25,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:25,738 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 [2023-11-21 22:13:25,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 18 [2023-11-21 22:13:25,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2023-11-21 22:13:25,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:25,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 42 [2023-11-21 22:13:25,863 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 16 treesize of output 5 [2023-11-21 22:13:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:25,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2023-11-21 22:13:26,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:26,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:13:26,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2023-11-21 22:13:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:26,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:26,684 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 [2023-11-21 22:13:26,688 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 [2023-11-21 22:13:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:26,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438394963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:26,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:26,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2023-11-21 22:13:26,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923749969] [2023-11-21 22:13:26,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:26,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-21 22:13:26,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:26,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-21 22:13:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2023-11-21 22:13:26,850 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 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) [2023-11-21 22:13:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:31,130 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-11-21 22:13:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-21 22:13:31,131 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 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 [2023-11-21 22:13:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:31,132 INFO L225 Difference]: With dead ends: 44 [2023-11-21 22:13:31,132 INFO L226 Difference]: Without dead ends: 42 [2023-11-21 22:13:31,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=385, Invalid=2585, Unknown=0, NotChecked=0, Total=2970 [2023-11-21 22:13:31,133 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 23 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:31,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 224 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 614 Invalid, 5 Unknown, 0 Unchecked, 3.4s Time] [2023-11-21 22:13:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-21 22:13:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2023-11-21 22:13:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 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) [2023-11-21 22:13:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-21 22:13:31,143 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2023-11-21 22:13:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:31,143 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-21 22:13:31,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 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) [2023-11-21 22:13:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-21 22:13:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 22:13:31,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:31,145 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-21 22:13:31,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:31,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 22:13:31,346 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:31,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:31,346 INFO L85 PathProgramCache]: Analyzing trace with hash -199738771, now seen corresponding path program 8 times [2023-11-21 22:13:31,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:31,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039195242] [2023-11-21 22:13:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:31,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:31,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:31,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039195242] [2023-11-21 22:13:31,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039195242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:31,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427275531] [2023-11-21 22:13:31,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:13:31,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:31,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:31,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:31,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:13:31,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:13:31,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:31,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:13:31,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:31,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:31,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427275531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:31,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:31,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-11-21 22:13:31,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480359618] [2023-11-21 22:13:31,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:31,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:13:31,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:31,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:13:31,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:13:31,910 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2023-11-21 22:13:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:32,040 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2023-11-21 22:13:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:13:32,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 22 [2023-11-21 22:13:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:32,041 INFO L225 Difference]: With dead ends: 48 [2023-11-21 22:13:32,041 INFO L226 Difference]: Without dead ends: 30 [2023-11-21 22:13:32,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:13:32,042 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:32,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 45 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-21 22:13:32,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-11-21 22:13:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-11-21 22:13:32,055 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2023-11-21 22:13:32,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:32,055 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-11-21 22:13:32,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) [2023-11-21 22:13:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-11-21 22:13:32,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:13:32,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:32,056 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1] [2023-11-21 22:13:32,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:32,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 22:13:32,268 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:32,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:32,269 INFO L85 PathProgramCache]: Analyzing trace with hash -209430786, now seen corresponding path program 9 times [2023-11-21 22:13:32,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:32,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310723460] [2023-11-21 22:13:32,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:32,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:32,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:32,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310723460] [2023-11-21 22:13:32,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310723460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:32,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468655486] [2023-11-21 22:13:32,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:13:32,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:32,846 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:32,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 22:13:33,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-21 22:13:33,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:33,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-21 22:13:33,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:33,178 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 11 [2023-11-21 22:13:33,746 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:13:33,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 10 [2023-11-21 22:13:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:33,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:34,319 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 20 treesize of output 18 [2023-11-21 22:13:34,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-21 22:13:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:34,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468655486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:34,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:34,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2023-11-21 22:13:34,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327507785] [2023-11-21 22:13:34,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:34,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-21 22:13:34,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:34,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-21 22:13:34,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2023-11-21 22:13:34,607 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 39 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) [2023-11-21 22:13:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:36,127 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-11-21 22:13:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-21 22:13:36,128 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 39 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) Word has length 23 [2023-11-21 22:13:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:36,129 INFO L225 Difference]: With dead ends: 44 [2023-11-21 22:13:36,129 INFO L226 Difference]: Without dead ends: 26 [2023-11-21 22:13:36,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=501, Invalid=3039, Unknown=0, NotChecked=0, Total=3540 [2023-11-21 22:13:36,131 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:36,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:13:36,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-21 22:13:36,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-21 22:13:36,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:36,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-11-21 22:13:36,144 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-11-21 22:13:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:36,144 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-11-21 22:13:36,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 39 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) [2023-11-21 22:13:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-11-21 22:13:36,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 22:13:36,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:36,145 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 1, 1, 1, 1, 1] [2023-11-21 22:13:36,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:36,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 22:13:36,366 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:36,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:36,367 INFO L85 PathProgramCache]: Analyzing trace with hash -509883251, now seen corresponding path program 10 times [2023-11-21 22:13:36,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:36,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103206453] [2023-11-21 22:13:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:36,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:37,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:37,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103206453] [2023-11-21 22:13:37,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103206453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:37,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35925095] [2023-11-21 22:13:37,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:13:37,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:37,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:37,007 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:37,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 22:13:37,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:13:37,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:37,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-21 22:13:37,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:37,360 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 [2023-11-21 22:13:37,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 22 [2023-11-21 22:13:37,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 73 [2023-11-21 22:13:37,480 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-11-21 22:13:37,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 54 [2023-11-21 22:13:37,514 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 16 treesize of output 5 [2023-11-21 22:13:37,526 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-21 22:13:37,527 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 40 treesize of output 18 [2023-11-21 22:13:38,156 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-21 22:13:38,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 10 [2023-11-21 22:13:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:38,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:38,514 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 [2023-11-21 22:13:38,518 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 [2023-11-21 22:13:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:38,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35925095] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:38,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:38,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2023-11-21 22:13:38,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578477436] [2023-11-21 22:13:38,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:38,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-21 22:13:38,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:38,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-21 22:13:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2023-11-21 22:13:38,742 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 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) [2023-11-21 22:13:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:41,560 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-11-21 22:13:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 22:13:41,560 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 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 24 [2023-11-21 22:13:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:41,561 INFO L225 Difference]: With dead ends: 36 [2023-11-21 22:13:41,561 INFO L226 Difference]: Without dead ends: 34 [2023-11-21 22:13:41,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=316, Invalid=2654, Unknown=0, NotChecked=0, Total=2970 [2023-11-21 22:13:41,562 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:41,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 159 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 516 Invalid, 2 Unknown, 0 Unchecked, 2.1s Time] [2023-11-21 22:13:41,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-21 22:13:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2023-11-21 22:13:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 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) [2023-11-21 22:13:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-11-21 22:13:41,578 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2023-11-21 22:13:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:41,578 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-11-21 22:13:41,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.675) internal successors, (67), 40 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) [2023-11-21 22:13:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-11-21 22:13:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 22:13:41,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:41,580 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1] [2023-11-21 22:13:41,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:41,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:13:41,792 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:41,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1372672487, now seen corresponding path program 11 times [2023-11-21 22:13:41,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:41,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373132171] [2023-11-21 22:13:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:41,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:42,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:42,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373132171] [2023-11-21 22:13:42,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373132171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:42,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771482525] [2023-11-21 22:13:42,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:13:42,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:42,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:42,331 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:42,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 22:13:42,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-21 22:13:42,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:42,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-21 22:13:42,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:42,745 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 [2023-11-21 22:13:43,103 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 [2023-11-21 22:13:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:43,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:43,483 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 18 treesize of output 16 [2023-11-21 22:13:43,485 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 [2023-11-21 22:13:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:43,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771482525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:43,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:43,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2023-11-21 22:13:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655301884] [2023-11-21 22:13:43,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:43,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-21 22:13:43,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-21 22:13:43,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2023-11-21 22:13:43,730 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 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) [2023-11-21 22:13:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:45,011 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2023-11-21 22:13:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-21 22:13:45,012 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-21 22:13:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:45,013 INFO L225 Difference]: With dead ends: 54 [2023-11-21 22:13:45,013 INFO L226 Difference]: Without dead ends: 52 [2023-11-21 22:13:45,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=293, Invalid=3613, Unknown=0, NotChecked=0, Total=3906 [2023-11-21 22:13:45,015 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:45,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 228 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:13:45,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-21 22:13:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2023-11-21 22:13:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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) [2023-11-21 22:13:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-11-21 22:13:45,038 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2023-11-21 22:13:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:45,038 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-11-21 22:13:45,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 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) [2023-11-21 22:13:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-11-21 22:13:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 22:13:45,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:45,040 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 1, 1, 1, 1, 1] [2023-11-21 22:13:45,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:45,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:13:45,279 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:45,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:45,279 INFO L85 PathProgramCache]: Analyzing trace with hash -721065994, now seen corresponding path program 12 times [2023-11-21 22:13:45,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:45,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129612822] [2023-11-21 22:13:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:45,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:46,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129612822] [2023-11-21 22:13:46,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129612822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:46,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552033062] [2023-11-21 22:13:46,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 22:13:46,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:46,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:46,089 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:46,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-21 22:13:46,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-21 22:13:46,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:46,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-21 22:13:46,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:46,580 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 [2023-11-21 22:13:46,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2023-11-21 22:13:46,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2023-11-21 22:13:46,677 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-21 22:13:46,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 32 [2023-11-21 22:13:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:13:46,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2023-11-21 22:13:46,711 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 16 treesize of output 5 [2023-11-21 22:13:47,116 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 [2023-11-21 22:13:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:47,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:49,567 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 [2023-11-21 22:13:49,571 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 [2023-11-21 22:13:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:49,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552033062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:49,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:49,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2023-11-21 22:13:49,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348040976] [2023-11-21 22:13:49,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:49,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-21 22:13:49,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:49,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-21 22:13:49,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2090, Unknown=0, NotChecked=0, Total=2256 [2023-11-21 22:13:49,880 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 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) [2023-11-21 22:13:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:51,040 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2023-11-21 22:13:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 22:13:51,040 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 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) Word has length 28 [2023-11-21 22:13:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:51,041 INFO L225 Difference]: With dead ends: 52 [2023-11-21 22:13:51,041 INFO L226 Difference]: Without dead ends: 50 [2023-11-21 22:13:51,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=337, Invalid=3695, Unknown=0, NotChecked=0, Total=4032 [2023-11-21 22:13:51,044 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:51,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 148 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:13:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-21 22:13:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2023-11-21 22:13:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 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) [2023-11-21 22:13:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-11-21 22:13:51,073 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2023-11-21 22:13:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:51,073 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-11-21 22:13:51,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 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) [2023-11-21 22:13:51,074 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-11-21 22:13:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 22:13:51,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:51,075 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1] [2023-11-21 22:13:51,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:51,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:13:51,284 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:51,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash 907712077, now seen corresponding path program 13 times [2023-11-21 22:13:51,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:51,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752978942] [2023-11-21 22:13:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:51,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:51,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752978942] [2023-11-21 22:13:51,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752978942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:51,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075006641] [2023-11-21 22:13:51,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 22:13:51,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:51,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:51,583 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:51,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 22:13:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:51,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 22:13:51,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:51,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:52,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075006641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:52,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:52,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2023-11-21 22:13:52,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662833853] [2023-11-21 22:13:52,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:52,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 22:13:52,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:52,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 22:13:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:13:52,141 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2023-11-21 22:13:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:52,354 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2023-11-21 22:13:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-21 22:13:52,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) Word has length 30 [2023-11-21 22:13:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:52,355 INFO L225 Difference]: With dead ends: 62 [2023-11-21 22:13:52,355 INFO L226 Difference]: Without dead ends: 38 [2023-11-21 22:13:52,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2023-11-21 22:13:52,357 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:52,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 62 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-21 22:13:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-11-21 22:13:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-11-21 22:13:52,376 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2023-11-21 22:13:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:52,377 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-11-21 22:13:52,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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) [2023-11-21 22:13:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-11-21 22:13:52,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 22:13:52,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:52,378 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1] [2023-11-21 22:13:52,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:52,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc627497-0f7c-47c6-b803-4b4e859274da/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 22:13:52,595 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:52,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:52,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2140302882, now seen corresponding path program 14 times [2023-11-21 22:13:52,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:52,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721976660] [2023-11-21 22:13:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:52,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat