./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:09:58,825 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:09:58,961 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:09:58,966 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:09:58,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:09:58,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:09:58,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:09:58,992 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:09:58,993 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:09:58,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:09:58,995 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:09:58,995 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:09:58,996 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:09:58,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:09:58,997 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:09:58,998 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:09:58,998 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:09:58,999 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:09:59,000 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:09:59,000 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:09:59,001 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:09:59,002 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:09:59,002 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:09:59,003 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:09:59,003 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:09:59,004 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:09:59,005 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:09:59,005 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:09:59,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:09:59,006 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:09:59,007 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:09:59,007 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:09:59,008 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:09:59,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:09:59,009 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:09:59,009 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:09:59,010 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:09:59,010 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:09:59,011 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:09:59,011 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_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 [2023-11-06 23:09:59,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:09:59,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:09:59,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:09:59,378 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:09:59,378 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:09:59,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2023-11-06 23:10:02,650 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:10:02,900 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:10:02,901 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2023-11-06 23:10:02,910 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/data/012231b72/15acb48d821c49c7aeae31eb1d09b782/FLAG45f23c67f [2023-11-06 23:10:02,944 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/data/012231b72/15acb48d821c49c7aeae31eb1d09b782 [2023-11-06 23:10:02,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:10:02,958 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:10:02,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:10:02,964 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:10:02,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:10:02,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:10:02" (1/1) ... [2023-11-06 23:10:02,973 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42d00bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:02, skipping insertion in model container [2023-11-06 23:10:02,973 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:10:02" (1/1) ... [2023-11-06 23:10:03,001 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:10:03,183 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_6e2b1f46-8018-4a80-8dd7-ed8735d61601/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i[919,932] [2023-11-06 23:10:03,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:10:03,208 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:10:03,223 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_6e2b1f46-8018-4a80-8dd7-ed8735d61601/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i[919,932] [2023-11-06 23:10:03,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:10:03,245 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:10:03,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03 WrapperNode [2023-11-06 23:10:03,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:10:03,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:10:03,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:10:03,248 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:10:03,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,288 INFO L138 Inliner]: procedures = 17, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2023-11-06 23:10:03,289 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:10:03,290 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:10:03,290 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:10:03,290 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:10:03,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,307 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,310 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:10:03,315 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:10:03,316 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:10:03,316 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:10:03,317 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (1/1) ... [2023-11-06 23:10:03,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:10:03,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:03,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:10:03,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:10:03,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:10:03,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:10:03,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:10:03,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:10:03,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:10:03,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:10:03,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:10:03,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:10:03,502 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:10:03,505 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:10:03,750 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:10:03,757 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:10:03,758 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:10:03,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:03 BoogieIcfgContainer [2023-11-06 23:10:03,760 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:10:03,763 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:10:03,763 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:10:03,768 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:10:03,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:10:02" (1/3) ... [2023-11-06 23:10:03,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f02f790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:03, skipping insertion in model container [2023-11-06 23:10:03,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:10:03" (2/3) ... [2023-11-06 23:10:03,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f02f790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:10:03, skipping insertion in model container [2023-11-06 23:10:03,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:10:03" (3/3) ... [2023-11-06 23:10:03,772 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2023-11-06 23:10:03,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:10:03,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:10:03,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:10:03,841 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=LoopsAndPotentialCycles, 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;@57cced4d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:10:03,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:10:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 23:10:03,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:03,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:03,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:03,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1820178652, now seen corresponding path program 1 times [2023-11-06 23:10:03,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:03,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100843832] [2023-11-06 23:10:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:03,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:04,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100843832] [2023-11-06 23:10:04,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100843832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:04,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:04,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:10:04,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495274616] [2023-11-06 23:10:04,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:04,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:10:04,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:10:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:10:04,073 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:04,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:04,101 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2023-11-06 23:10:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:10:04,103 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 [2023-11-06 23:10:04,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:04,126 INFO L225 Difference]: With dead ends: 32 [2023-11-06 23:10:04,126 INFO L226 Difference]: Without dead ends: 13 [2023-11-06 23:10:04,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:10:04,142 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:04,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:10:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-06 23:10:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-06 23:10:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-06 23:10:04,184 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2023-11-06 23:10:04,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:04,184 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-06 23:10:04,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-06 23:10:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 23:10:04,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:04,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:04,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:10:04,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:04,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1808172879, now seen corresponding path program 1 times [2023-11-06 23:10:04,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:04,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235672303] [2023-11-06 23:10:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:04,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:04,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:04,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235672303] [2023-11-06 23:10:04,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235672303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:04,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:04,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:04,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873939183] [2023-11-06 23:10:04,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:04,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:04,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:04,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:04,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:04,394 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:04,438 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-11-06 23:10:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:04,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 [2023-11-06 23:10:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:04,440 INFO L225 Difference]: With dead ends: 30 [2023-11-06 23:10:04,440 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 23:10:04,441 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 [2023-11-06 23:10:04,443 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:04,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:10:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 23:10:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2023-11-06 23:10:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-06 23:10:04,450 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2023-11-06 23:10:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:04,450 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-06 23:10:04,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-06 23:10:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 23:10:04,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:04,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:04,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:10:04,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:04,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:04,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1968450312, now seen corresponding path program 1 times [2023-11-06 23:10:04,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:04,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620892090] [2023-11-06 23:10:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:04,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:04,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:04,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620892090] [2023-11-06 23:10:04,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620892090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:04,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697545406] [2023-11-06 23:10:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:04,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:04,750 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:04,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:10:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:04,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:10:04,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:05,129 INFO L351 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 [2023-11-06 23:10:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:05,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:05,403 INFO L351 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 44 treesize of output 40 [2023-11-06 23:10:05,424 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:05,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:10:05,551 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:05,551 INFO L351 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 58 treesize of output 56 [2023-11-06 23:10:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:05,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697545406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:05,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:05,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 14 [2023-11-06 23:10:05,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041240379] [2023-11-06 23:10:05,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:05,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:10:05,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:05,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:10:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:10:05,785 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2023-11-06 23:10:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:06,031 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-11-06 23:10:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:10:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) Word has length 11 [2023-11-06 23:10:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:06,034 INFO L225 Difference]: With dead ends: 40 [2023-11-06 23:10:06,034 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 23:10:06,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:10:06,039 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:06,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 49 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:10:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 23:10:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2023-11-06 23:10:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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) [2023-11-06 23:10:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-06 23:10:06,049 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2023-11-06 23:10:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:06,049 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-06 23:10:06,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2023-11-06 23:10:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-06 23:10:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 23:10:06,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:06,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:06,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:10:06,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:06,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:06,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash -209237439, now seen corresponding path program 2 times [2023-11-06 23:10:06,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:06,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745762991] [2023-11-06 23:10:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:06,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:06,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:06,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745762991] [2023-11-06 23:10:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745762991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:06,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576972531] [2023-11-06 23:10:06,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:06,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:06,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:06,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:06,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:10:06,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:06,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:06,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 23:10:06,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:06,717 INFO L351 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 [2023-11-06 23:10:06,872 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-06 23:10:06,873 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2023-11-06 23:10:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:06,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:07,261 INFO L351 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 44 treesize of output 40 [2023-11-06 23:10:07,276 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:07,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:10:07,336 INFO L322 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-06 23:10:07,336 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 43 [2023-11-06 23:10:07,357 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:07,358 INFO L351 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 20 treesize of output 20 [2023-11-06 23:10:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:07,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576972531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:07,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:07,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 19 [2023-11-06 23:10:07,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997177499] [2023-11-06 23:10:07,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:07,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:10:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:10:07,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:10:07,495 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:08,287 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2023-11-06 23:10:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 23:10:08,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2023-11-06 23:10:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:08,288 INFO L225 Difference]: With dead ends: 54 [2023-11-06 23:10:08,289 INFO L226 Difference]: Without dead ends: 47 [2023-11-06 23:10:08,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 23:10:08,291 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:08,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 51 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:10:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-06 23:10:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2023-11-06 23:10:08,298 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) [2023-11-06 23:10:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-11-06 23:10:08,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2023-11-06 23:10:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:08,300 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-11-06 23:10:08,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:08,304 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-11-06 23:10:08,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 23:10:08,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:08,307 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:08,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:08,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:08,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:08,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash -549955312, now seen corresponding path program 1 times [2023-11-06 23:10:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:08,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586108436] [2023-11-06 23:10:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:08,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:08,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586108436] [2023-11-06 23:10:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586108436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:08,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363602837] [2023-11-06 23:10:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:08,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:08,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:08,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:10:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:08,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 23:10:08,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:08,859 INFO L351 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 [2023-11-06 23:10:09,005 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:10:09,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:10:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:09,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:09,681 INFO L351 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 44 treesize of output 40 [2023-11-06 23:10:09,695 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:09,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:10:09,755 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:09,756 INFO L351 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 62 treesize of output 56 [2023-11-06 23:10:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:09,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363602837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:09,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:09,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 14] total 26 [2023-11-06 23:10:09,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572554972] [2023-11-06 23:10:09,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:09,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:10:09,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:10:09,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2023-11-06 23:10:09,984 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2023-11-06 23:10:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:11,239 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2023-11-06 23:10:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:10:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 23 [2023-11-06 23:10:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:11,240 INFO L225 Difference]: With dead ends: 58 [2023-11-06 23:10:11,241 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 23:10:11,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 23:10:11,243 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:11,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 87 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:10:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 23:10:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2023-11-06 23:10:11,259 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) [2023-11-06 23:10:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-11-06 23:10:11,260 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 23 [2023-11-06 23:10:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:11,261 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-11-06 23:10:11,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2023-11-06 23:10:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-11-06 23:10:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 23:10:11,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:11,262 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:11,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:11,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:11,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:11,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1289871521, now seen corresponding path program 2 times [2023-11-06 23:10:11,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:11,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368191957] [2023-11-06 23:10:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:11,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 23:10:11,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:11,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368191957] [2023-11-06 23:10:11,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368191957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:11,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861390613] [2023-11-06 23:10:11,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:11,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:11,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:11,721 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:11,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:10:11,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:11,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:11,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 23:10:11,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:11,889 INFO L351 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 [2023-11-06 23:10:12,036 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:10:12,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:10:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:12,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:12,888 INFO L351 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 44 treesize of output 40 [2023-11-06 23:10:12,901 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:12,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:10:12,970 INFO L322 Elim1Store]: treesize reduction 22, result has 54.2 percent of original size [2023-11-06 23:10:12,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 57 [2023-11-06 23:10:13,015 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:13,016 INFO L351 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 42 treesize of output 29 [2023-11-06 23:10:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:13,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861390613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:13,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:13,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 16] total 30 [2023-11-06 23:10:13,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174429065] [2023-11-06 23:10:13,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:13,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 23:10:13,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:13,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 23:10:13,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-11-06 23:10:13,312 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:14,820 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2023-11-06 23:10:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:10:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 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 31 [2023-11-06 23:10:14,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:14,821 INFO L225 Difference]: With dead ends: 70 [2023-11-06 23:10:14,821 INFO L226 Difference]: Without dead ends: 57 [2023-11-06 23:10:14,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=353, Invalid=2299, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 23:10:14,826 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:14,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 139 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:10:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-06 23:10:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2023-11-06 23:10:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-11-06 23:10:14,857 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2023-11-06 23:10:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:14,858 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-11-06 23:10:14,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-11-06 23:10:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 23:10:14,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:14,861 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:14,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:15,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:10:15,074 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:15,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash -731259602, now seen corresponding path program 3 times [2023-11-06 23:10:15,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:15,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193684676] [2023-11-06 23:10:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:15,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 23:10:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193684676] [2023-11-06 23:10:15,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193684676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705924365] [2023-11-06 23:10:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:10:15,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:15,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:15,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:10:15,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 23:10:15,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:15,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-06 23:10:15,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:16,012 INFO L351 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 [2023-11-06 23:10:16,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-06 23:10:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 23:10:16,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:17,162 INFO L351 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 44 treesize of output 40 [2023-11-06 23:10:17,185 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:17,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:10:17,233 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 23:10:17,234 INFO L351 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 22 treesize of output 10 [2023-11-06 23:10:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:17,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705924365] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:17,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:17,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 21] total 35 [2023-11-06 23:10:17,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819273346] [2023-11-06 23:10:17,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:17,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 23:10:17,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:17,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 23:10:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 23:10:17,738 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 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) [2023-11-06 23:10:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:26,530 INFO L93 Difference]: Finished difference Result 195 states and 204 transitions. [2023-11-06 23:10:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-06 23:10:26,531 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 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 39 [2023-11-06 23:10:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:26,539 INFO L225 Difference]: With dead ends: 195 [2023-11-06 23:10:26,539 INFO L226 Difference]: Without dead ends: 178 [2023-11-06 23:10:26,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2487 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1717, Invalid=6839, Unknown=0, NotChecked=0, Total=8556 [2023-11-06 23:10:26,545 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 548 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:26,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 323 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 23:10:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-06 23:10:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 73. [2023-11-06 23:10:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2023-11-06 23:10:26,569 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 39 [2023-11-06 23:10:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:26,570 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2023-11-06 23:10:26,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 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) [2023-11-06 23:10:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2023-11-06 23:10:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-06 23:10:26,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:26,572 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:26,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:26,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:10:26,779 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:26,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:26,780 INFO L85 PathProgramCache]: Analyzing trace with hash -995306883, now seen corresponding path program 4 times [2023-11-06 23:10:26,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:26,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321919632] [2023-11-06 23:10:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:26,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-06 23:10:27,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:27,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321919632] [2023-11-06 23:10:27,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321919632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:27,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324804247] [2023-11-06 23:10:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:10:27,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:27,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:27,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:10:27,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:10:27,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:27,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 23:10:27,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:27,353 INFO L351 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 [2023-11-06 23:10:27,513 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:10:27,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:10:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:27,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:28,643 INFO L351 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 44 treesize of output 40 [2023-11-06 23:10:28,659 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:28,660 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:10:28,722 INFO L322 Elim1Store]: treesize reduction 22, result has 54.2 percent of original size [2023-11-06 23:10:28,723 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 57 [2023-11-06 23:10:28,758 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:28,758 INFO L351 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 51 treesize of output 34 [2023-11-06 23:10:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:10:29,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324804247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:29,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:29,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19, 20] total 38 [2023-11-06 23:10:29,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205616656] [2023-11-06 23:10:29,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:29,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 23:10:29,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:29,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 23:10:29,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 23:10:29,145 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:30,968 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2023-11-06 23:10:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 23:10:30,969 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 0 states have call successors, (0), 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 47 [2023-11-06 23:10:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:30,970 INFO L225 Difference]: With dead ends: 128 [2023-11-06 23:10:30,970 INFO L226 Difference]: Without dead ends: 107 [2023-11-06 23:10:30,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=431, Invalid=3475, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 23:10:30,973 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:30,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 377 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 23:10:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-06 23:10:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2023-11-06 23:10:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 90 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2023-11-06 23:10:31,003 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 47 [2023-11-06 23:10:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:31,004 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2023-11-06 23:10:31,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2023-11-06 23:10:31,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 23:10:31,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:31,006 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:31,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:31,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:10:31,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:31,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash -237486260, now seen corresponding path program 5 times [2023-11-06 23:10:31,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:31,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923878421] [2023-11-06 23:10:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:31,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-06 23:10:31,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:31,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923878421] [2023-11-06 23:10:31,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923878421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:31,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903848980] [2023-11-06 23:10:31,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:10:31,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:31,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:31,544 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:31,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:10:45,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-06 23:10:45,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:45,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 23:10:45,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:45,826 INFO L351 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 [2023-11-06 23:10:45,881 INFO L351 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 31 treesize of output 15 [2023-11-06 23:10:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:46,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:46,788 INFO L351 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 44 treesize of output 40 [2023-11-06 23:10:46,802 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:46,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:10:46,859 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:46,860 INFO L351 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 215 treesize of output 194 [2023-11-06 23:10:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:48,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903848980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:48,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:48,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20, 24] total 43 [2023-11-06 23:10:48,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723080430] [2023-11-06 23:10:48,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:48,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 23:10:48,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:48,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 23:10:48,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 23:10:48,550 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 43 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:51,581 INFO L93 Difference]: Finished difference Result 187 states and 194 transitions. [2023-11-06 23:10:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-06 23:10:51,582 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 43 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-06 23:10:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:51,582 INFO L225 Difference]: With dead ends: 187 [2023-11-06 23:10:51,583 INFO L226 Difference]: Without dead ends: 162 [2023-11-06 23:10:51,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=424, Invalid=3866, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 23:10:51,585 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 148 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:51,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 579 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 23:10:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-06 23:10:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2023-11-06 23:10:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2023-11-06 23:10:51,621 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 55 [2023-11-06 23:10:51,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:51,621 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2023-11-06 23:10:51,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 43 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2023-11-06 23:10:51,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 23:10:51,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:51,623 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:51,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:51,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:51,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:51,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2042797157, now seen corresponding path program 6 times [2023-11-06 23:10:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:51,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642273676] [2023-11-06 23:10:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:51,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-06 23:10:52,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:52,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642273676] [2023-11-06 23:10:52,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642273676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:52,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015565930] [2023-11-06 23:10:52,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:10:52,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:52,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:52,194 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:52,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:10:54,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-06 23:10:54,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:54,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-06 23:10:54,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:54,636 INFO L351 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 [2023-11-06 23:10:54,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-06 23:10:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-06 23:10:54,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:55,991 INFO L351 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 44 treesize of output 40 [2023-11-06 23:10:56,006 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:56,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:10:56,036 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:10:56,045 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:56,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 18 [2023-11-06 23:10:56,052 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:10:56,052 INFO L351 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 23 treesize of output 10 [2023-11-06 23:10:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:58,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015565930] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:58,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:58,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 26] total 43 [2023-11-06 23:10:58,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280550735] [2023-11-06 23:10:58,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:58,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 23:10:58,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:58,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 23:10:58,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 23:10:58,089 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 43 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:51,226 INFO L93 Difference]: Finished difference Result 337 states and 349 transitions. [2023-11-06 23:11:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-11-06 23:11:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 43 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-06 23:11:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:51,228 INFO L225 Difference]: With dead ends: 337 [2023-11-06 23:11:51,228 INFO L226 Difference]: Without dead ends: 308 [2023-11-06 23:11:51,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5030 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=3278, Invalid=13752, Unknown=0, NotChecked=0, Total=17030 [2023-11-06 23:11:51,234 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1133 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:51,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 777 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-06 23:11:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-06 23:11:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 147. [2023-11-06 23:11:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0890410958904109) internal successors, (159), 146 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2023-11-06 23:11:51,287 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 63 [2023-11-06 23:11:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:51,288 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2023-11-06 23:11:51,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 43 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:11:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2023-11-06 23:11:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-06 23:11:51,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:51,290 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:51,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:51,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:51,496 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:51,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash 950254327, now seen corresponding path program 7 times [2023-11-06 23:11:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:51,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959042081] [2023-11-06 23:11:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:51,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-06 23:11:51,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:51,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959042081] [2023-11-06 23:11:51,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959042081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:51,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893290365] [2023-11-06 23:11:51,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:11:51,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:51,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:51,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:52,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:11:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:52,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-06 23:11:52,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:52,232 INFO L351 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 [2023-11-06 23:11:52,409 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:11:52,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:11:52,523 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:11:52,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:11:58,529 INFO L322 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2023-11-06 23:11:58,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 49 [2023-11-06 23:11:59,260 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:11:59,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:12:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 8 proven. 208 refuted. 6 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 23:12:06,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:08,047 INFO L351 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 44 treesize of output 40 [2023-11-06 23:12:08,061 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:08,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:12:08,112 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:08,113 INFO L351 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 62 treesize of output 56 [2023-11-06 23:12:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-06 23:12:08,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893290365] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:08,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:08,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 24, 22] total 48 [2023-11-06 23:12:08,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436410163] [2023-11-06 23:12:08,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:08,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-06 23:12:08,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:08,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-06 23:12:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2047, Unknown=11, NotChecked=0, Total=2256 [2023-11-06 23:12:08,803 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand has 48 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 48 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:30,443 INFO L93 Difference]: Finished difference Result 236 states and 250 transitions. [2023-11-06 23:12:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-06 23:12:30,443 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 48 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-06 23:12:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:30,445 INFO L225 Difference]: With dead ends: 236 [2023-11-06 23:12:30,445 INFO L226 Difference]: Without dead ends: 180 [2023-11-06 23:12:30,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=855, Invalid=8630, Unknown=21, NotChecked=0, Total=9506 [2023-11-06 23:12:30,449 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 222 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1707 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:30,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 931 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1707 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 23:12:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-06 23:12:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2023-11-06 23:12:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2023-11-06 23:12:30,512 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 67 [2023-11-06 23:12:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:30,512 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2023-11-06 23:12:30,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8333333333333335) internal successors, (136), 48 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:12:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2023-11-06 23:12:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-06 23:12:30,514 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:30,514 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:30,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:30,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:30,721 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:30,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash 756890813, now seen corresponding path program 8 times [2023-11-06 23:12:30,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:30,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658945574] [2023-11-06 23:12:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:30,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 23:12:31,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:31,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658945574] [2023-11-06 23:12:31,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658945574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:31,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202523276] [2023-11-06 23:12:31,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:12:31,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:31,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:31,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:12:31,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:12:31,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:31,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-06 23:12:31,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:31,449 INFO L351 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 [2023-11-06 23:12:31,610 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:12:31,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:12:31,694 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:12:31,694 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:12:31,828 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:12:31,828 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:12:38,070 INFO L322 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2023-11-06 23:12:38,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2023-11-06 23:12:42,091 INFO L322 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2023-11-06 23:12:42,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2023-11-06 23:12:42,309 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:12:42,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:12:46,011 INFO L322 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2023-11-06 23:12:46,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2023-11-06 23:12:46,723 INFO L322 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2023-11-06 23:12:46,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 23:12:50,999 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:50,999 INFO L351 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 68 treesize of output 44 [2023-11-06 23:12:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 50 proven. 166 refuted. 20 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-06 23:12:51,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:53,056 INFO L351 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 44 treesize of output 40 [2023-11-06 23:12:53,068 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:53,068 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:12:53,132 INFO L322 Elim1Store]: treesize reduction 22, result has 54.2 percent of original size [2023-11-06 23:12:53,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 57 [2023-11-06 23:12:53,161 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:53,161 INFO L351 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 42 treesize of output 29 [2023-11-06 23:12:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-11-06 23:12:53,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202523276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:53,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:53,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 18] total 44 [2023-11-06 23:12:53,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124033971] [2023-11-06 23:12:53,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:53,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 23:12:53,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 23:12:53,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1707, Unknown=5, NotChecked=0, Total=1892 [2023-11-06 23:12:53,637 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:13:00,496 INFO L93 Difference]: Finished difference Result 223 states and 234 transitions. [2023-11-06 23:13:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-06 23:13:00,496 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-06 23:13:00,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:13:00,498 INFO L225 Difference]: With dead ends: 223 [2023-11-06 23:13:00,498 INFO L226 Difference]: Without dead ends: 175 [2023-11-06 23:13:00,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 91 SyntacticMatches, 14 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=1002, Invalid=10335, Unknown=5, NotChecked=0, Total=11342 [2023-11-06 23:13:00,501 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 237 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:13:00,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 880 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 23:13:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-06 23:13:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 109. [2023-11-06 23:13:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 108 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2023-11-06 23:13:00,566 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 67 [2023-11-06 23:13:00,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:13:00,567 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2023-11-06 23:13:00,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.772727272727273) internal successors, (122), 44 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:00,567 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2023-11-06 23:13:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-06 23:13:00,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:13:00,569 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2023-11-06 23:13:00,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-06 23:13:00,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:13:00,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:13:00,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:13:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1313657678, now seen corresponding path program 9 times [2023-11-06 23:13:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:13:00,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999333953] [2023-11-06 23:13:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:13:00,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:13:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:13:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-06 23:13:01,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:13:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999333953] [2023-11-06 23:13:01,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999333953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:13:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771636488] [2023-11-06 23:13:01,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:13:01,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:13:01,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:13:01,420 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:13:01,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e2b1f46-8018-4a80-8dd7-ed8735d61601/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:13:48,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-11-06 23:13:48,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:13:48,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 103 conjunts are in the unsatisfiable core [2023-11-06 23:13:48,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:13:48,475 INFO L351 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 [2023-11-06 23:13:48,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-06 23:13:48,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 29 [2023-11-06 23:13:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-06 23:13:48,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:13:53,585 INFO L351 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 44 treesize of output 40 [2023-11-06 23:13:53,609 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:13:53,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-11-06 23:13:53,678 INFO L322 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-06 23:13:53,678 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 15 [2023-11-06 23:13:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:13:57,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771636488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:13:57,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:13:57,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25, 40] total 66 [2023-11-06 23:13:57,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008099103] [2023-11-06 23:13:57,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:13:57,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-06 23:13:57,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:13:57,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-06 23:13:57,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=3601, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 23:13:57,069 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 66 states, 66 states have (on average 2.4242424242424243) internal successors, (160), 66 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)