./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s4if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s4if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:30:02,572 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:30:02,635 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:30:02,639 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:30:02,640 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:30:02,662 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:30:02,663 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:30:02,663 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:30:02,664 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:30:02,664 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:30:02,665 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:30:02,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:30:02,666 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:30:02,667 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:30:02,667 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:30:02,668 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:30:02,669 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:30:02,669 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:30:02,670 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:30:02,670 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:30:02,671 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:30:02,671 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:30:02,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:30:02,672 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:30:02,672 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:30:02,673 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:30:02,673 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:30:02,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:30:02,674 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:30:02,674 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:30:02,675 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:30:02,675 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:30:02,675 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:30:02,676 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:30:02,676 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:30:02,676 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:30:02,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:30:02,676 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:30:02,676 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:30:02,677 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:30:02,677 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:30:02,677 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:30:02,677 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_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e [2023-11-29 04:30:02,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:30:02,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:30:02,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:30:02,922 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:30:02,923 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:30:02,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-fpi/s4if.c [2023-11-29 04:30:05,729 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:30:05,914 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:30:05,914 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/sv-benchmarks/c/array-fpi/s4if.c [2023-11-29 04:30:05,921 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/data/fd5e175a5/af0bea16a7d846b89d89d43e82212f0b/FLAG81b465cee [2023-11-29 04:30:05,934 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/data/fd5e175a5/af0bea16a7d846b89d89d43e82212f0b [2023-11-29 04:30:05,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:30:05,938 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:30:05,940 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:30:05,940 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:30:05,946 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:30:05,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:30:05" (1/1) ... [2023-11-29 04:30:05,947 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66cf36b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:05, skipping insertion in model container [2023-11-29 04:30:05,947 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:30:05" (1/1) ... [2023-11-29 04:30:05,966 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:30:06,096 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_8bfb54ea-7625-4e3f-80da-5662c59b5f37/sv-benchmarks/c/array-fpi/s4if.c[587,600] [2023-11-29 04:30:06,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:30:06,122 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:30:06,133 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_8bfb54ea-7625-4e3f-80da-5662c59b5f37/sv-benchmarks/c/array-fpi/s4if.c[587,600] [2023-11-29 04:30:06,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:30:06,155 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:30:06,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06 WrapperNode [2023-11-29 04:30:06,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:30:06,157 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:30:06,157 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:30:06,157 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:30:06,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,171 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,193 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-11-29 04:30:06,194 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:30:06,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:30:06,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:30:06,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:30:06,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,207 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,220 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 7, 4, 6]. 37 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 1, 3]. [2023-11-29 04:30:06,221 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,221 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,229 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,233 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,234 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,238 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:30:06,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:30:06,239 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:30:06,240 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:30:06,241 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (1/1) ... [2023-11-29 04:30:06,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:30:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:06,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:30:06,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:30:06,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:30:06,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:30:06,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:30:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:30:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 04:30:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:30:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:30:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:30:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:30:06,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 04:30:06,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:30:06,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:30:06,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:30:06,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:30:06,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:30:06,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:30:06,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 04:30:06,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:30:06,390 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:30:06,392 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:30:06,532 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:30:06,559 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:30:06,560 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 04:30:06,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:30:06 BoogieIcfgContainer [2023-11-29 04:30:06,560 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:30:06,564 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:30:06,564 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:30:06,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:30:06,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:30:05" (1/3) ... [2023-11-29 04:30:06,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647df080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:30:06, skipping insertion in model container [2023-11-29 04:30:06,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:30:06" (2/3) ... [2023-11-29 04:30:06,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647df080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:30:06, skipping insertion in model container [2023-11-29 04:30:06,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:30:06" (3/3) ... [2023-11-29 04:30:06,570 INFO L112 eAbstractionObserver]: Analyzing ICFG s4if.c [2023-11-29 04:30:06,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:30:06,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:30:06,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:30:06,645 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4a08841c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:30:06,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:30:06,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:06,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 04:30:06,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:06,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:06,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:06,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:06,661 INFO L85 PathProgramCache]: Analyzing trace with hash -278767546, now seen corresponding path program 1 times [2023-11-29 04:30:06,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:06,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272323245] [2023-11-29 04:30:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:06,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:06,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:06,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272323245] [2023-11-29 04:30:06,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272323245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:30:06,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:30:06,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:30:06,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861038277] [2023-11-29 04:30:06,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:30:06,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:30:06,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:30:06,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:30:06,856 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:06,878 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2023-11-29 04:30:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:30:06,881 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 04:30:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:06,889 INFO L225 Difference]: With dead ends: 29 [2023-11-29 04:30:06,889 INFO L226 Difference]: Without dead ends: 13 [2023-11-29 04:30:06,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:30:06,895 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:06,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:30:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-29 04:30:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-29 04:30:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-29 04:30:06,920 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-11-29 04:30:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:06,921 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-29 04:30:06,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-29 04:30:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 04:30:06,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:06,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:06,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:30:06,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:06,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:06,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1088114172, now seen corresponding path program 1 times [2023-11-29 04:30:06,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:06,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582126427] [2023-11-29 04:30:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:07,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:07,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582126427] [2023-11-29 04:30:07,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582126427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:30:07,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:30:07,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:30:07,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563292628] [2023-11-29 04:30:07,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:30:07,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:30:07,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:07,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:30:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:30:07,092 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:07,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:07,135 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2023-11-29 04:30:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:30:07,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 04:30:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:07,137 INFO L225 Difference]: With dead ends: 25 [2023-11-29 04:30:07,137 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 04:30:07,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:30:07,139 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:07,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:30:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 04:30:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2023-11-29 04:30:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-29 04:30:07,145 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2023-11-29 04:30:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:07,146 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-29 04:30:07,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-29 04:30:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 04:30:07,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:07,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:07,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:30:07,147 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:07,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash 54367998, now seen corresponding path program 1 times [2023-11-29 04:30:07,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:07,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569563146] [2023-11-29 04:30:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:07,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569563146] [2023-11-29 04:30:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569563146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890455827] [2023-11-29 04:30:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:07,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:07,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:07,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:30:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:07,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 04:30:07,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:07,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:30:08,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:08,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:08,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890455827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:08,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:08,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2023-11-29 04:30:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283678412] [2023-11-29 04:30:08,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:08,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:30:08,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:30:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:30:08,200 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:08,510 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-29 04:30:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:30:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 04:30:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:08,512 INFO L225 Difference]: With dead ends: 33 [2023-11-29 04:30:08,512 INFO L226 Difference]: Without dead ends: 29 [2023-11-29 04:30:08,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:30:08,514 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:08,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 30 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:30:08,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-29 04:30:08,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2023-11-29 04:30:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-29 04:30:08,521 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-11-29 04:30:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:08,521 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-29 04:30:08,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-29 04:30:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 04:30:08,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:08,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:08,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:30:08,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:08,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:08,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash 111626300, now seen corresponding path program 1 times [2023-11-29 04:30:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:08,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108397473] [2023-11-29 04:30:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:08,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:08,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:30:08,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665492686] [2023-11-29 04:30:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:08,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:08,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:08,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:08,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:30:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:08,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:30:08,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:08,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:30:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:08,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:08,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-29 04:30:08,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-29 04:30:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:08,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:08,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108397473] [2023-11-29 04:30:08,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:30:08,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665492686] [2023-11-29 04:30:08,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665492686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:08,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:30:08,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-29 04:30:08,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843682164] [2023-11-29 04:30:08,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:30:08,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:30:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:30:08,917 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2023-11-29 04:30:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:08,982 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-11-29 04:30:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:30:08,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 04:30:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:08,984 INFO L225 Difference]: With dead ends: 35 [2023-11-29 04:30:08,984 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 04:30:08,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:30:08,986 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:08,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 35 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:30:08,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 04:30:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-29 04:30:08,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-29 04:30:08,993 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2023-11-29 04:30:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:08,993 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-29 04:30:08,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2023-11-29 04:30:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-29 04:30:08,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 04:30:08,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:08,994 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:08,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:30:09,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:09,195 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:09,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash -230177790, now seen corresponding path program 2 times [2023-11-29 04:30:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:09,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102266686] [2023-11-29 04:30:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:09,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102266686] [2023-11-29 04:30:09,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102266686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145982200] [2023-11-29 04:30:09,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:30:09,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:09,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:09,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:09,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:30:09,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:30:09,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:09,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:30:09,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:09,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:09,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145982200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:09,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:09,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 04:30:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14394166] [2023-11-29 04:30:09,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:09,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:30:09,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:30:09,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:30:09,456 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:09,583 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-11-29 04:30:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:30:09,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 15 [2023-11-29 04:30:09,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:09,584 INFO L225 Difference]: With dead ends: 30 [2023-11-29 04:30:09,584 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 04:30:09,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:30:09,586 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:09,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 04:30:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2023-11-29 04:30:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-11-29 04:30:09,592 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2023-11-29 04:30:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:09,593 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-11-29 04:30:09,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-11-29 04:30:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 04:30:09,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:09,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:09,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:30:09,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:09,795 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:09,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:09,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2013377864, now seen corresponding path program 3 times [2023-11-29 04:30:09,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:09,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755934958] [2023-11-29 04:30:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:09,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:09,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755934958] [2023-11-29 04:30:09,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755934958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:09,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433988432] [2023-11-29 04:30:09,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:30:09,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:09,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:09,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:09,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:30:09,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:30:09,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:09,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:30:09,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:09,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:10,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433988432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:10,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:10,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-29 04:30:10,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945408514] [2023-11-29 04:30:10,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:10,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:30:10,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:10,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:30:10,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:30:10,035 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:10,128 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-29 04:30:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:30:10,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 04:30:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:10,129 INFO L225 Difference]: With dead ends: 33 [2023-11-29 04:30:10,129 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 04:30:10,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:30:10,130 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:10,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 04:30:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-11-29 04:30:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-29 04:30:10,137 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2023-11-29 04:30:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:10,138 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-29 04:30:10,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-29 04:30:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 04:30:10,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:10,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:10,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:30:10,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:10,344 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:10,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash -919717436, now seen corresponding path program 4 times [2023-11-29 04:30:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:10,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710306753] [2023-11-29 04:30:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:10,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:10,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:10,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710306753] [2023-11-29 04:30:10,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710306753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:10,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755226905] [2023-11-29 04:30:10,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:30:10,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:10,872 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:10,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:30:10,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:30:10,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:10,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:30:10,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:10,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:30:11,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:11,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:11,335 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 04:30:11,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-11-29 04:30:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:11,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:11,692 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 04:30:11,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-11-29 04:30:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:11,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755226905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:11,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:11,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2023-11-29 04:30:11,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372952041] [2023-11-29 04:30:11,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 04:30:11,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 04:30:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:30:11,990 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:13,530 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2023-11-29 04:30:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 04:30:13,531 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 04:30:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:13,532 INFO L225 Difference]: With dead ends: 53 [2023-11-29 04:30:13,533 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 04:30:13,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=410, Invalid=2560, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 04:30:13,535 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:13,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 76 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:30:13,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 04:30:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2023-11-29 04:30:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-11-29 04:30:13,546 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 18 [2023-11-29 04:30:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:13,546 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-11-29 04:30:13,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:13,547 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-11-29 04:30:13,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 04:30:13,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:13,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:13,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:30:13,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:13,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:13,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:13,748 INFO L85 PathProgramCache]: Analyzing trace with hash -862459134, now seen corresponding path program 1 times [2023-11-29 04:30:13,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:13,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632634506] [2023-11-29 04:30:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:13,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:30:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265260529] [2023-11-29 04:30:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:13,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:13,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:13,762 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:13,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:30:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:13,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:30:13,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:13,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:30:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:13,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:13,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 04:30:13,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:30:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:13,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:13,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632634506] [2023-11-29 04:30:13,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:30:13,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265260529] [2023-11-29 04:30:13,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265260529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:13,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:30:13,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-29 04:30:13,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474413111] [2023-11-29 04:30:13,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:13,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:30:13,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:13,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:30:13,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:30:13,991 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:14,057 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2023-11-29 04:30:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:30:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 04:30:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:14,058 INFO L225 Difference]: With dead ends: 58 [2023-11-29 04:30:14,058 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 04:30:14,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:30:14,059 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:14,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:30:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 04:30:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-11-29 04:30:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-11-29 04:30:14,071 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 18 [2023-11-29 04:30:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:14,072 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-11-29 04:30:14,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-11-29 04:30:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 04:30:14,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:14,073 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:14,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 04:30:14,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:14,273 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:14,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1651358520, now seen corresponding path program 5 times [2023-11-29 04:30:14,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:14,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795780247] [2023-11-29 04:30:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:14,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:14,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:14,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795780247] [2023-11-29 04:30:14,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795780247] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:14,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710233939] [2023-11-29 04:30:14,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:30:14,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:14,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:14,379 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:14,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:30:14,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 04:30:14,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:14,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:30:14,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:14,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:14,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710233939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:14,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:14,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-29 04:30:14,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834900653] [2023-11-29 04:30:14,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:14,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:30:14,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:14,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:30:14,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:30:14,586 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:14,697 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2023-11-29 04:30:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:30:14,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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) Word has length 19 [2023-11-29 04:30:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:14,698 INFO L225 Difference]: With dead ends: 48 [2023-11-29 04:30:14,698 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 04:30:14,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:30:14,700 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:14,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 16 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 04:30:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2023-11-29 04:30:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-11-29 04:30:14,711 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 19 [2023-11-29 04:30:14,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:14,711 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-11-29 04:30:14,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-11-29 04:30:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 04:30:14,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:14,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:14,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:30:14,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 04:30:14,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:14,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:14,913 INFO L85 PathProgramCache]: Analyzing trace with hash -109476352, now seen corresponding path program 2 times [2023-11-29 04:30:14,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:14,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335140205] [2023-11-29 04:30:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:14,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:14,926 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:30:14,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294670944] [2023-11-29 04:30:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:30:14,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:14,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:14,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:14,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:30:15,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:30:15,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:15,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:30:15,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:15,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:15,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:15,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335140205] [2023-11-29 04:30:15,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:30:15,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294670944] [2023-11-29 04:30:15,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294670944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:15,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:30:15,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-29 04:30:15,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015394562] [2023-11-29 04:30:15,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:15,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:30:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:30:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:30:15,122 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:15,203 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-11-29 04:30:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:30:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-29 04:30:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:15,204 INFO L225 Difference]: With dead ends: 51 [2023-11-29 04:30:15,204 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 04:30:15,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:30:15,205 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:15,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:15,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 04:30:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-29 04:30:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-29 04:30:15,212 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2023-11-29 04:30:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:15,212 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-29 04:30:15,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-29 04:30:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 04:30:15,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:15,213 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:15,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:30:15,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:30:15,416 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:15,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:15,416 INFO L85 PathProgramCache]: Analyzing trace with hash 472759102, now seen corresponding path program 6 times [2023-11-29 04:30:15,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:15,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530245373] [2023-11-29 04:30:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:15,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:16,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:16,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530245373] [2023-11-29 04:30:16,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530245373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826602913] [2023-11-29 04:30:16,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:30:16,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:16,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:16,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:30:16,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 04:30:16,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:16,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 04:30:16,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:16,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:30:16,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:16,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:16,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:16,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:16,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826602913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:16,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:16,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 37 [2023-11-29 04:30:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690717823] [2023-11-29 04:30:16,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:16,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 04:30:16,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 04:30:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 04:30:16,992 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 37 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:17,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:17,581 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-11-29 04:30:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 04:30:17,581 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 37 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 04:30:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:17,582 INFO L225 Difference]: With dead ends: 42 [2023-11-29 04:30:17,582 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 04:30:17,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=1942, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 04:30:17,584 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:17,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:30:17,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 04:30:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-11-29 04:30:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-11-29 04:30:17,590 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2023-11-29 04:30:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:17,590 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-11-29 04:30:17,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 37 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:17,590 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-11-29 04:30:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 04:30:17,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:17,591 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:17,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:30:17,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:30:17,792 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:17,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash 530017404, now seen corresponding path program 3 times [2023-11-29 04:30:17,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:17,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790171462] [2023-11-29 04:30:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:17,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:17,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:30:17,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41265751] [2023-11-29 04:30:17,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:30:17,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:17,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:17,806 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:17,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:30:17,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:30:17,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:17,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:30:17,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:17,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 04:30:17,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:30:17,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-29 04:30:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:30:18,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:30:18,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:18,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790171462] [2023-11-29 04:30:18,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:30:18,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41265751] [2023-11-29 04:30:18,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41265751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:18,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:30:18,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-29 04:30:18,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193295139] [2023-11-29 04:30:18,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:18,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:30:18,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:18,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:30:18,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:30:18,085 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:18,224 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-11-29 04:30:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:30:18,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) Word has length 22 [2023-11-29 04:30:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:18,226 INFO L225 Difference]: With dead ends: 39 [2023-11-29 04:30:18,226 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 04:30:18,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:30:18,227 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:18,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 04:30:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-11-29 04:30:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-11-29 04:30:18,236 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2023-11-29 04:30:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:18,236 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-11-29 04:30:18,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-11-29 04:30:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 04:30:18,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:18,237 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:18,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 04:30:18,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:18,438 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:18,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1177770942, now seen corresponding path program 7 times [2023-11-29 04:30:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:18,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814180709] [2023-11-29 04:30:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:18,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:18,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:18,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814180709] [2023-11-29 04:30:18,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814180709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:18,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153755129] [2023-11-29 04:30:18,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:30:18,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:18,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:18,572 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:18,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:30:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:18,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:30:18,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:18,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:18,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153755129] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:18,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:18,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 04:30:18,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627330840] [2023-11-29 04:30:18,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:18,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:30:18,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:30:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:30:18,834 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:19,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:19,055 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-11-29 04:30:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:30:19,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 04:30:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:19,057 INFO L225 Difference]: With dead ends: 49 [2023-11-29 04:30:19,057 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 04:30:19,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:30:19,058 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:19,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 31 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 04:30:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2023-11-29 04:30:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-29 04:30:19,068 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2023-11-29 04:30:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:19,068 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-29 04:30:19,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-29 04:30:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 04:30:19,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:19,069 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:19,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:30:19,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:19,272 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:19,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1987303160, now seen corresponding path program 8 times [2023-11-29 04:30:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:19,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457332980] [2023-11-29 04:30:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:19,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:19,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:19,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457332980] [2023-11-29 04:30:19,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457332980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:19,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383791176] [2023-11-29 04:30:19,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:30:19,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:19,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:19,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:19,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:30:19,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:30:19,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:19,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:30:19,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:19,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:19,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383791176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:19,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:19,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 04:30:19,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382469285] [2023-11-29 04:30:19,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:19,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:30:19,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:30:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:30:19,621 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:19,752 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2023-11-29 04:30:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:30:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-29 04:30:19,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:19,753 INFO L225 Difference]: With dead ends: 52 [2023-11-29 04:30:19,753 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 04:30:19,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-29 04:30:19,754 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:19,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 26 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 04:30:19,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2023-11-29 04:30:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:19,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-11-29 04:30:19,764 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2023-11-29 04:30:19,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:19,764 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-11-29 04:30:19,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:19,764 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-11-29 04:30:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 04:30:19,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:19,765 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:19,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:30:19,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:30:19,968 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:19,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash 152727940, now seen corresponding path program 9 times [2023-11-29 04:30:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:19,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041381471] [2023-11-29 04:30:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:19,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:21,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041381471] [2023-11-29 04:30:21,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041381471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284180197] [2023-11-29 04:30:21,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:30:21,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:21,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:21,344 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:21,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:30:21,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 04:30:21,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:21,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 04:30:21,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:21,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:30:21,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:21,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:22,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:22,284 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-11-29 04:30:22,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 13 [2023-11-29 04:30:22,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:22,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:23,154 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-29 04:30:23,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 17 [2023-11-29 04:30:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:23,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284180197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:23,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:23,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 53 [2023-11-29 04:30:23,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152694289] [2023-11-29 04:30:23,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:23,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 04:30:23,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:23,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 04:30:23,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2566, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 04:30:23,447 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:24,705 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2023-11-29 04:30:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 04:30:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 04:30:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:24,706 INFO L225 Difference]: With dead ends: 48 [2023-11-29 04:30:24,706 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 04:30:24,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=337, Invalid=3953, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 04:30:24,708 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:24,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 04:30:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 04:30:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-11-29 04:30:24,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-29 04:30:24,717 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2023-11-29 04:30:24,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:24,717 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-29 04:30:24,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-29 04:30:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 04:30:24,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:24,718 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:24,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 04:30:24,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:30:24,919 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:24,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash 832786310, now seen corresponding path program 4 times [2023-11-29 04:30:24,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10670404] [2023-11-29 04:30:24,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:24,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:24,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:30:24,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584093887] [2023-11-29 04:30:24,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:30:24,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:24,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:24,932 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:24,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:30:25,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:30:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:25,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 04:30:25,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:25,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:30:25,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-11-29 04:30:25,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:30:25,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 36 treesize of output 30 [2023-11-29 04:30:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:30:25,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:30:25,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:25,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10670404] [2023-11-29 04:30:25,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:30:25,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584093887] [2023-11-29 04:30:25,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584093887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:25,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:30:25,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2023-11-29 04:30:25,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372108700] [2023-11-29 04:30:25,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:25,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:30:25,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:25,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:30:25,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:30:25,349 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:25,711 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2023-11-29 04:30:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:30:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 04:30:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:25,712 INFO L225 Difference]: With dead ends: 46 [2023-11-29 04:30:25,712 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 04:30:25,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:30:25,713 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:25,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 04:30:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2023-11-29 04:30:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-29 04:30:25,729 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2023-11-29 04:30:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:25,730 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-29 04:30:25,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-29 04:30:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 04:30:25,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:25,731 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:25,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 04:30:25,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 04:30:25,936 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:25,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2069182600, now seen corresponding path program 10 times [2023-11-29 04:30:25,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:25,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879787391] [2023-11-29 04:30:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:26,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879787391] [2023-11-29 04:30:26,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879787391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:26,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216933476] [2023-11-29 04:30:26,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:30:26,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:26,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:26,104 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:26,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:30:26,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:30:26,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:26,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:30:26,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:26,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:26,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216933476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:26,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:26,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-29 04:30:26,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533777712] [2023-11-29 04:30:26,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:26,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:30:26,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:26,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:30:26,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:30:26,440 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:26,752 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2023-11-29 04:30:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:30:26,753 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 04:30:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:26,753 INFO L225 Difference]: With dead ends: 68 [2023-11-29 04:30:26,754 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 04:30:26,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:30:26,755 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:26,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:30:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 04:30:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 30. [2023-11-29 04:30:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-29 04:30:26,769 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2023-11-29 04:30:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:26,769 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-29 04:30:26,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-29 04:30:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 04:30:26,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:26,770 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:26,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 04:30:26,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:30:26,971 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:26,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1208253182, now seen corresponding path program 11 times [2023-11-29 04:30:26,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:26,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176028138] [2023-11-29 04:30:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:26,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:27,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:27,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176028138] [2023-11-29 04:30:27,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176028138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:27,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764939058] [2023-11-29 04:30:27,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:30:27,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:27,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:27,142 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:27,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:30:27,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 04:30:27,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:27,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:30:27,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:27,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:27,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764939058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:27,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:27,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-29 04:30:27,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673590591] [2023-11-29 04:30:27,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:27,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:30:27,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:30:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:30:27,468 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:27,626 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-11-29 04:30:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:30:27,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-29 04:30:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:27,627 INFO L225 Difference]: With dead ends: 71 [2023-11-29 04:30:27,627 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 04:30:27,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:30:27,628 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:27,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 04:30:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2023-11-29 04:30:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-29 04:30:27,643 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 29 [2023-11-29 04:30:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:27,643 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-29 04:30:27,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-29 04:30:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 04:30:27,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:27,644 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:27,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:30:27,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:30:27,844 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:27,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1107742850, now seen corresponding path program 12 times [2023-11-29 04:30:27,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:27,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619007879] [2023-11-29 04:30:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:27,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:29,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:29,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619007879] [2023-11-29 04:30:29,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619007879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:29,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025154934] [2023-11-29 04:30:29,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:30:29,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:29,467 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:29,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:30:29,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 04:30:29,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:29,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-29 04:30:29,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:29,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:30:29,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:29,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:30,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:30,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:30,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:30,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:31,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025154934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:31,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:31,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 59 [2023-11-29 04:30:31,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598136728] [2023-11-29 04:30:31,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:31,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 04:30:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 04:30:31,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3226, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 04:30:31,838 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 59 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:33,279 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-11-29 04:30:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 04:30:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-29 04:30:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:33,280 INFO L225 Difference]: With dead ends: 57 [2023-11-29 04:30:33,280 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 04:30:33,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=324, Invalid=4932, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 04:30:33,282 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:33,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 136 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 04:30:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 04:30:33,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2023-11-29 04:30:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-11-29 04:30:33,302 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2023-11-29 04:30:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:33,302 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-11-29 04:30:33,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-11-29 04:30:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 04:30:33,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:33,303 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:33,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:30:33,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:33,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:33,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:33,504 INFO L85 PathProgramCache]: Analyzing trace with hash -849577412, now seen corresponding path program 5 times [2023-11-29 04:30:33,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:33,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44453660] [2023-11-29 04:30:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:33,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:33,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:30:33,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119687933] [2023-11-29 04:30:33,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:30:33,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:33,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:33,515 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:33,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:30:33,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 04:30:33,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:33,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 04:30:33,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:33,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:30:33,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 04:30:33,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:30:33,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 04:30:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:30:33,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:34,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2023-11-29 04:30:34,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-11-29 04:30:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:30:34,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:34,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44453660] [2023-11-29 04:30:34,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:30:34,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119687933] [2023-11-29 04:30:34,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119687933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:34,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:30:34,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-11-29 04:30:34,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704674517] [2023-11-29 04:30:34,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:34,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 04:30:34,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:34,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 04:30:34,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-11-29 04:30:34,081 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:34,317 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2023-11-29 04:30:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:30:34,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-29 04:30:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:34,318 INFO L225 Difference]: With dead ends: 67 [2023-11-29 04:30:34,318 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 04:30:34,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:30:34,319 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:34,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 71 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 274 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 04:30:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-11-29 04:30:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-11-29 04:30:34,338 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 30 [2023-11-29 04:30:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:34,338 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-11-29 04:30:34,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:34,339 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-11-29 04:30:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 04:30:34,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:34,339 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:34,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 04:30:34,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:34,540 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:34,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:34,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2008077442, now seen corresponding path program 13 times [2023-11-29 04:30:34,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:34,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906369154] [2023-11-29 04:30:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:34,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:34,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:34,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906369154] [2023-11-29 04:30:34,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906369154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:34,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352997094] [2023-11-29 04:30:34,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:30:34,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:34,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:34,745 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:34,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:30:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:34,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:30:34,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:35,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:35,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352997094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:35,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:35,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-29 04:30:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204517210] [2023-11-29 04:30:35,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:35,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 04:30:35,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 04:30:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:30:35,126 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:35,438 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-11-29 04:30:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:30:35,438 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-29 04:30:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:35,439 INFO L225 Difference]: With dead ends: 64 [2023-11-29 04:30:35,439 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 04:30:35,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:30:35,441 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:35,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:30:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 04:30:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2023-11-29 04:30:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-11-29 04:30:35,457 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 31 [2023-11-29 04:30:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:35,458 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-11-29 04:30:35,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-11-29 04:30:35,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 04:30:35,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:35,458 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:35,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 04:30:35,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:35,659 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:35,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:35,660 INFO L85 PathProgramCache]: Analyzing trace with hash -994489144, now seen corresponding path program 14 times [2023-11-29 04:30:35,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:35,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15610297] [2023-11-29 04:30:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:35,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:35,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:35,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15610297] [2023-11-29 04:30:35,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15610297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:35,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120275452] [2023-11-29 04:30:35,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:30:35,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:35,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:35,833 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:35,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:30:35,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:30:35,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:35,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:30:35,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:36,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:36,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120275452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:36,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:36,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-29 04:30:36,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9217419] [2023-11-29 04:30:36,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:36,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 04:30:36,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 04:30:36,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:30:36,179 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:36,333 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-11-29 04:30:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:30:36,334 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-29 04:30:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:36,334 INFO L225 Difference]: With dead ends: 72 [2023-11-29 04:30:36,335 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 04:30:36,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:30:36,336 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:36,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 27 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 04:30:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-11-29 04:30:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-11-29 04:30:36,356 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2023-11-29 04:30:36,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:36,357 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-11-29 04:30:36,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-11-29 04:30:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 04:30:36,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:36,357 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:36,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 04:30:36,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:36,558 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:36,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash -425371324, now seen corresponding path program 15 times [2023-11-29 04:30:36,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:36,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123149202] [2023-11-29 04:30:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:36,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:38,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:38,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123149202] [2023-11-29 04:30:38,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123149202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:38,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110154010] [2023-11-29 04:30:38,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:30:38,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:38,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:38,299 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:38,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:30:38,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 04:30:38,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:38,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-29 04:30:38,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:38,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:30:38,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:38,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:38,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:39,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:39,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:39,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:39,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:41,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110154010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:41,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:41,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 68 [2023-11-29 04:30:41,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671559580] [2023-11-29 04:30:41,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:41,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-29 04:30:41,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-29 04:30:41,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=4328, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 04:30:41,402 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 68 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 68 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:43,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:43,369 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2023-11-29 04:30:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 04:30:43,369 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 68 states have internal predecessors, (92), 0 states have call successors, (0), 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 34 [2023-11-29 04:30:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:43,370 INFO L225 Difference]: With dead ends: 67 [2023-11-29 04:30:43,370 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 04:30:43,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=373, Invalid=6599, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 04:30:43,373 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:43,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 165 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 04:30:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 04:30:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2023-11-29 04:30:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-11-29 04:30:43,401 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 34 [2023-11-29 04:30:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:43,401 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-11-29 04:30:43,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 68 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-11-29 04:30:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 04:30:43,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:43,402 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:43,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 04:30:43,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 04:30:43,602 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:43,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash 37411912, now seen corresponding path program 16 times [2023-11-29 04:30:43,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:43,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452882735] [2023-11-29 04:30:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:43,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:43,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:43,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452882735] [2023-11-29 04:30:43,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452882735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:43,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73055295] [2023-11-29 04:30:43,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:30:43,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:43,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:43,803 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:43,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:30:43,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:30:43,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:43,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 04:30:43,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:44,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:44,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73055295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:44,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:44,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 04:30:44,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111780269] [2023-11-29 04:30:44,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:44,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:30:44,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:44,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:30:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:30:44,228 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:44,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:44,518 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2023-11-29 04:30:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:30:44,518 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-29 04:30:44,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:44,519 INFO L225 Difference]: With dead ends: 77 [2023-11-29 04:30:44,519 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 04:30:44,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 04:30:44,520 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:44,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 29 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:30:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 04:30:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 38. [2023-11-29 04:30:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-11-29 04:30:44,534 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 35 [2023-11-29 04:30:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:44,534 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-11-29 04:30:44,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:44,535 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-11-29 04:30:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 04:30:44,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:44,535 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:44,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 04:30:44,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 04:30:44,736 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:44,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash -544570046, now seen corresponding path program 17 times [2023-11-29 04:30:44,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:44,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186613551] [2023-11-29 04:30:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:44,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 54 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:44,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:44,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186613551] [2023-11-29 04:30:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186613551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409394082] [2023-11-29 04:30:44,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:30:44,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:44,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:44,955 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:44,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:30:45,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 04:30:45,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:45,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 04:30:45,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:45,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:45,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409394082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:45,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:45,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 04:30:45,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869993633] [2023-11-29 04:30:45,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:30:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:30:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:30:45,426 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:45,597 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2023-11-29 04:30:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:30:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-29 04:30:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:45,598 INFO L225 Difference]: With dead ends: 85 [2023-11-29 04:30:45,598 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 04:30:45,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:30:45,599 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 72 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:45,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 04:30:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2023-11-29 04:30:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-29 04:30:45,617 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 37 [2023-11-29 04:30:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:45,617 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-29 04:30:45,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-29 04:30:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 04:30:45,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:45,618 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:45,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:30:45,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 04:30:45,818 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:45,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:45,819 INFO L85 PathProgramCache]: Analyzing trace with hash -614206530, now seen corresponding path program 18 times [2023-11-29 04:30:45,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:45,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925320339] [2023-11-29 04:30:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:45,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:47,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:47,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925320339] [2023-11-29 04:30:47,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925320339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:47,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443803255] [2023-11-29 04:30:47,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:30:47,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:47,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:47,543 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:47,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:30:47,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 04:30:47,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:47,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 04:30:47,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:47,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:30:48,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:48,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:48,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:48,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:48,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:48,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:49,221 INFO L349 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2023-11-29 04:30:49,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 22 [2023-11-29 04:30:49,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:30:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:49,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:51,229 INFO L349 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2023-11-29 04:30:51,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 86 treesize of output 29 [2023-11-29 04:30:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:51,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443803255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:51,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:51,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28, 28] total 83 [2023-11-29 04:30:51,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528063125] [2023-11-29 04:30:51,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:51,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-29 04:30:51,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:51,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-29 04:30:51,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=6511, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 04:30:51,825 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:54,643 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-11-29 04:30:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 04:30:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 0 states have call successors, (0), 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 38 [2023-11-29 04:30:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:54,644 INFO L225 Difference]: With dead ends: 69 [2023-11-29 04:30:54,644 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 04:30:54,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=510, Invalid=9792, Unknown=0, NotChecked=0, Total=10302 [2023-11-29 04:30:54,646 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:54,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 209 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 04:30:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 04:30:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2023-11-29 04:30:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2023-11-29 04:30:54,670 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 38 [2023-11-29 04:30:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:54,670 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2023-11-29 04:30:54,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:54,670 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2023-11-29 04:30:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 04:30:54,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:54,671 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:54,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 04:30:54,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 04:30:54,871 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:54,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1522029762, now seen corresponding path program 19 times [2023-11-29 04:30:54,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:54,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651947030] [2023-11-29 04:30:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:55,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651947030] [2023-11-29 04:30:55,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651947030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371675833] [2023-11-29 04:30:55,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:30:55,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:55,098 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:55,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 04:30:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:55,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 04:30:55,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:55,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:55,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371675833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:55,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:55,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-29 04:30:55,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910357012] [2023-11-29 04:30:55,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:55,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:30:55,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:30:55,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:30:55,497 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:55,862 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2023-11-29 04:30:55,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 04:30:55,862 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 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 [2023-11-29 04:30:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:55,863 INFO L225 Difference]: With dead ends: 89 [2023-11-29 04:30:55,863 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 04:30:55,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 04:30:55,864 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:55,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 30 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:30:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 04:30:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 42. [2023-11-29 04:30:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-11-29 04:30:55,883 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2023-11-29 04:30:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:55,883 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-11-29 04:30:55,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-11-29 04:30:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 04:30:55,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:55,883 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:55,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 04:30:56,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 04:30:56,084 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:56,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash 272965768, now seen corresponding path program 20 times [2023-11-29 04:30:56,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:56,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178899211] [2023-11-29 04:30:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:56,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:56,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:56,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178899211] [2023-11-29 04:30:56,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178899211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:56,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734761201] [2023-11-29 04:30:56,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:30:56,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:56,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:56,301 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:56,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 04:30:56,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:30:56,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:56,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 04:30:56,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:56,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:30:56,698 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:56,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734761201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:30:56,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:30:56,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-29 04:30:56,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392676463] [2023-11-29 04:30:56,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:30:56,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:30:56,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:30:56,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:30:56,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:30:56,701 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:30:56,896 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2023-11-29 04:30:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 04:30:56,896 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-29 04:30:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:30:56,897 INFO L225 Difference]: With dead ends: 92 [2023-11-29 04:30:56,897 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 04:30:56,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 04:30:56,897 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:30:56,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 37 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:30:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 04:30:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2023-11-29 04:30:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-11-29 04:30:56,916 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 41 [2023-11-29 04:30:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:30:56,916 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-11-29 04:30:56,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:30:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-11-29 04:30:56,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 04:30:56,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:30:56,917 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:30:56,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 04:30:57,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 04:30:57,117 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:30:57,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:30:57,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1937051388, now seen corresponding path program 21 times [2023-11-29 04:30:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:30:57,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956314431] [2023-11-29 04:30:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:30:57,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:30:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:30:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:30:59,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:30:59,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956314431] [2023-11-29 04:30:59,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956314431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:30:59,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318013010] [2023-11-29 04:30:59,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:30:59,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:30:59,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:30:59,506 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:30:59,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 04:30:59,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 04:30:59,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:30:59,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 04:30:59,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:30:59,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:31:00,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:00,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:00,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:00,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:00,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:01,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:01,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:01,819 INFO L349 Elim1Store]: treesize reduction 224, result has 0.4 percent of original size [2023-11-29 04:31:01,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 25 [2023-11-29 04:31:01,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:02,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:04,625 INFO L349 Elim1Store]: treesize reduction 238, result has 0.4 percent of original size [2023-11-29 04:31:04,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 98 treesize of output 33 [2023-11-29 04:31:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:05,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318013010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:05,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:31:05,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 31, 31] total 93 [2023-11-29 04:31:05,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338441272] [2023-11-29 04:31:05,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:05,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-11-29 04:31:05,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-11-29 04:31:05,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=8226, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 04:31:05,418 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:09,007 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-11-29 04:31:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 04:31:09,007 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 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 42 [2023-11-29 04:31:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:09,008 INFO L225 Difference]: With dead ends: 76 [2023-11-29 04:31:09,008 INFO L226 Difference]: Without dead ends: 72 [2023-11-29 04:31:09,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4029 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=569, Invalid=12313, Unknown=0, NotChecked=0, Total=12882 [2023-11-29 04:31:09,010 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:09,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 196 Invalid, 2558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 04:31:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-29 04:31:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2023-11-29 04:31:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-11-29 04:31:09,038 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 42 [2023-11-29 04:31:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:09,038 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-11-29 04:31:09,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-11-29 04:31:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 04:31:09,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:09,039 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:09,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 04:31:09,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 04:31:09,239 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:09,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:09,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1678885950, now seen corresponding path program 6 times [2023-11-29 04:31:09,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:09,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895001345] [2023-11-29 04:31:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:09,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:09,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:09,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877568003] [2023-11-29 04:31:09,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:31:09,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:09,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:09,255 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:09,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 04:31:09,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 04:31:09,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:09,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 04:31:09,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:09,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:31:09,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:09,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 04:31:09,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:09,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:09,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:09,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:09,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-29 04:31:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 46 proven. 75 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:31:11,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:11,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-29 04:31:11,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-29 04:31:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 47 proven. 73 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:31:11,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:11,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895001345] [2023-11-29 04:31:11,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:11,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877568003] [2023-11-29 04:31:11,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877568003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:11,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:11,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2023-11-29 04:31:11,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259861950] [2023-11-29 04:31:11,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:11,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 04:31:11,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:11,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 04:31:11,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=878, Unknown=1, NotChecked=0, Total=992 [2023-11-29 04:31:11,930 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:12,363 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2023-11-29 04:31:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:31:12,364 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 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 42 [2023-11-29 04:31:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:12,364 INFO L225 Difference]: With dead ends: 78 [2023-11-29 04:31:12,364 INFO L226 Difference]: Without dead ends: 66 [2023-11-29 04:31:12,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=1052, Unknown=1, NotChecked=0, Total=1190 [2023-11-29 04:31:12,365 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:12,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:31:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-29 04:31:12,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-11-29 04:31:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2023-11-29 04:31:12,401 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2023-11-29 04:31:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:12,401 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2023-11-29 04:31:12,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2023-11-29 04:31:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 04:31:12,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:12,401 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:12,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-29 04:31:12,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:12,602 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:12,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:12,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1728106488, now seen corresponding path program 22 times [2023-11-29 04:31:12,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:12,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771223082] [2023-11-29 04:31:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:12,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 28 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:12,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:12,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771223082] [2023-11-29 04:31:12,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771223082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:31:12,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596348791] [2023-11-29 04:31:12,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:31:12,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:12,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:12,849 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:12,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 04:31:13,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:31:13,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:13,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 04:31:13,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:13,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:13,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596348791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:13,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:31:13,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-29 04:31:13,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476300271] [2023-11-29 04:31:13,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 04:31:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 04:31:13,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-29 04:31:13,467 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:13,976 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2023-11-29 04:31:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 04:31:13,977 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 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 43 [2023-11-29 04:31:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:13,977 INFO L225 Difference]: With dead ends: 96 [2023-11-29 04:31:13,977 INFO L226 Difference]: Without dead ends: 92 [2023-11-29 04:31:13,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=538, Invalid=1912, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 04:31:13,978 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:13,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 31 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:31:13,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-29 04:31:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 46. [2023-11-29 04:31:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-11-29 04:31:14,004 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2023-11-29 04:31:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:14,005 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-11-29 04:31:14,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-11-29 04:31:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 04:31:14,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:14,005 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:14,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 04:31:14,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:14,206 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:14,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2021709186, now seen corresponding path program 23 times [2023-11-29 04:31:14,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:14,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987485593] [2023-11-29 04:31:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:14,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 95 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:14,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:14,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987485593] [2023-11-29 04:31:14,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987485593] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:31:14,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648469759] [2023-11-29 04:31:14,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:31:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:14,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:14,464 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:14,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 04:31:14,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 04:31:14,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:14,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 04:31:14,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:14,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:15,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648469759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:15,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:31:15,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-29 04:31:15,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948085188] [2023-11-29 04:31:15,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:15,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 04:31:15,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:15,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 04:31:15,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-11-29 04:31:15,080 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:15,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:15,330 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2023-11-29 04:31:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 04:31:15,331 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-29 04:31:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:15,331 INFO L225 Difference]: With dead ends: 99 [2023-11-29 04:31:15,331 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 04:31:15,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 04:31:15,333 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 96 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:15,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:31:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 04:31:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2023-11-29 04:31:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-11-29 04:31:15,358 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 45 [2023-11-29 04:31:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:15,358 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-11-29 04:31:15,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-11-29 04:31:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 04:31:15,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:15,359 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:15,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 04:31:15,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:15,559 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:15,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:15,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1003354114, now seen corresponding path program 24 times [2023-11-29 04:31:15,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:15,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722917877] [2023-11-29 04:31:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:15,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:18,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:18,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722917877] [2023-11-29 04:31:18,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722917877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:31:18,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276224990] [2023-11-29 04:31:18,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:31:18,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:18,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:18,109 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:18,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 04:31:18,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-29 04:31:18,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:18,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 105 conjunts are in the unsatisfiable core [2023-11-29 04:31:18,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:18,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:31:18,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:18,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:18,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:19,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:19,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:19,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:20,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:20,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:20,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 04:31:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 04:31:21,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:24,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:24,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 117 treesize of output 37 [2023-11-29 04:31:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 84 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 04:31:25,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276224990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:25,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:31:25,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 33, 33] total 101 [2023-11-29 04:31:25,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90141781] [2023-11-29 04:31:25,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:25,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-29 04:31:25,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-29 04:31:25,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=9444, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 04:31:25,042 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:33,574 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2023-11-29 04:31:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 04:31:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 0 states have call successors, (0), 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 46 [2023-11-29 04:31:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:33,575 INFO L225 Difference]: With dead ends: 109 [2023-11-29 04:31:33,575 INFO L226 Difference]: Without dead ends: 91 [2023-11-29 04:31:33,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6955 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1954, Invalid=27802, Unknown=0, NotChecked=0, Total=29756 [2023-11-29 04:31:33,579 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:33,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2556 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 04:31:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-29 04:31:33,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2023-11-29 04:31:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2023-11-29 04:31:33,643 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 46 [2023-11-29 04:31:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:33,644 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2023-11-29 04:31:33,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2023-11-29 04:31:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 04:31:33,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:33,645 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:33,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 04:31:33,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 04:31:33,845 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:33,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:33,846 INFO L85 PathProgramCache]: Analyzing trace with hash -745188676, now seen corresponding path program 7 times [2023-11-29 04:31:33,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:33,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210700251] [2023-11-29 04:31:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:33,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:33,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:33,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024331150] [2023-11-29 04:31:33,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:31:33,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:33,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:33,860 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:33,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 04:31:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:33,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 04:31:34,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:34,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:31:34,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:34,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 04:31:34,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:34,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:34,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:34,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:34,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-29 04:31:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 54 proven. 101 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:31:34,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:34,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-29 04:31:34,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-29 04:31:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 55 proven. 99 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:31:35,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:35,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210700251] [2023-11-29 04:31:35,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:35,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024331150] [2023-11-29 04:31:35,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024331150] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:35,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:35,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-11-29 04:31:35,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846291198] [2023-11-29 04:31:35,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:35,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 04:31:35,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:35,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 04:31:35,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 04:31:35,137 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:35,723 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2023-11-29 04:31:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:31:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-29 04:31:35,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:35,725 INFO L225 Difference]: With dead ends: 91 [2023-11-29 04:31:35,725 INFO L226 Difference]: Without dead ends: 79 [2023-11-29 04:31:35,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 04:31:35,725 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:35,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 128 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:31:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-29 04:31:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2023-11-29 04:31:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 77 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2023-11-29 04:31:35,779 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 46 [2023-11-29 04:31:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:35,779 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2023-11-29 04:31:35,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2023-11-29 04:31:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 04:31:35,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:35,779 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:35,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 04:31:35,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:35,980 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:35,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash -447811834, now seen corresponding path program 8 times [2023-11-29 04:31:35,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:35,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622346252] [2023-11-29 04:31:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:35,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:35,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:35,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749271449] [2023-11-29 04:31:35,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:31:35,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:35,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:35,996 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:35,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 04:31:36,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:31:36,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:36,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:31:36,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 145 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:36,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 145 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:36,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:36,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622346252] [2023-11-29 04:31:36,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:36,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749271449] [2023-11-29 04:31:36,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749271449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:36,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:36,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2023-11-29 04:31:36,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194832134] [2023-11-29 04:31:36,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:36,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 04:31:36,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 04:31:36,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:31:36,534 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:36,900 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2023-11-29 04:31:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:31:36,900 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-29 04:31:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:36,901 INFO L225 Difference]: With dead ends: 119 [2023-11-29 04:31:36,901 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 04:31:36,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=473, Invalid=1419, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 04:31:36,902 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 111 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:36,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 25 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:31:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 04:31:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2023-11-29 04:31:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 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) [2023-11-29 04:31:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-11-29 04:31:36,934 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 49 [2023-11-29 04:31:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:36,934 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-11-29 04:31:36,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-11-29 04:31:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 04:31:36,935 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:36,935 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:36,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 04:31:37,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:37,135 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:37,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:37,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1209367678, now seen corresponding path program 9 times [2023-11-29 04:31:37,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:37,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792179990] [2023-11-29 04:31:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:37,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:37,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:37,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825218503] [2023-11-29 04:31:37,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:31:37,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:37,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:37,152 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:37,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 04:31:37,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 04:31:37,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:37,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 04:31:37,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:37,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:31:37,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-11-29 04:31:37,384 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:37,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2023-11-29 04:31:37,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:37,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 43 [2023-11-29 04:31:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-29 04:31:37,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 78 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-29 04:31:37,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:37,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792179990] [2023-11-29 04:31:37,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:37,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825218503] [2023-11-29 04:31:37,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825218503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:37,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:37,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2023-11-29 04:31:37,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274021671] [2023-11-29 04:31:37,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:37,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:31:37,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:31:37,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:31:37,861 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:38,433 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2023-11-29 04:31:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:31:38,434 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-29 04:31:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:38,435 INFO L225 Difference]: With dead ends: 58 [2023-11-29 04:31:38,435 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 04:31:38,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:31:38,435 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:38,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:31:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 04:31:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-29 04:31:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2023-11-29 04:31:38,479 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 50 [2023-11-29 04:31:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:38,480 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2023-11-29 04:31:38,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2023-11-29 04:31:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 04:31:38,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:38,480 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:38,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-29 04:31:38,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 04:31:38,681 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:38,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:38,681 INFO L85 PathProgramCache]: Analyzing trace with hash -547796412, now seen corresponding path program 10 times [2023-11-29 04:31:38,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:38,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251880580] [2023-11-29 04:31:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:38,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:38,694 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647528651] [2023-11-29 04:31:38,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:31:38,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:38,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:38,695 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:38,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 04:31:38,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:31:38,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:38,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 04:31:38,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:38,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:31:38,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-11-29 04:31:38,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:38,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2023-11-29 04:31:38,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:38,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 52 treesize of output 57 [2023-11-29 04:31:39,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:39,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 56 [2023-11-29 04:31:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 31 proven. 109 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 04:31:39,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 04:31:39,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:39,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251880580] [2023-11-29 04:31:39,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:39,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647528651] [2023-11-29 04:31:39,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647528651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:39,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:39,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2023-11-29 04:31:39,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213708459] [2023-11-29 04:31:39,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:39,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 04:31:39,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 04:31:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:31:39,562 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:40,525 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-11-29 04:31:40,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:31:40,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 53 [2023-11-29 04:31:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:40,526 INFO L225 Difference]: With dead ends: 61 [2023-11-29 04:31:40,526 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 04:31:40,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:31:40,527 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:40,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:31:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 04:31:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-29 04:31:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-11-29 04:31:40,568 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 53 [2023-11-29 04:31:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:40,568 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-11-29 04:31:40,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-11-29 04:31:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 04:31:40,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:40,568 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:40,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 04:31:40,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 04:31:40,769 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:40,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1283132350, now seen corresponding path program 11 times [2023-11-29 04:31:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:40,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918360440] [2023-11-29 04:31:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:40,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:40,786 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:40,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430144225] [2023-11-29 04:31:40,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:31:40,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:40,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:40,787 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:40,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 04:31:41,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-29 04:31:41,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:41,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 04:31:41,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 210 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:41,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 210 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:41,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:41,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918360440] [2023-11-29 04:31:41,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:41,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430144225] [2023-11-29 04:31:41,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430144225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:41,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:41,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2023-11-29 04:31:41,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941366006] [2023-11-29 04:31:41,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:41,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 04:31:41,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 04:31:41,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 04:31:41,885 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:42,623 INFO L93 Difference]: Finished difference Result 239 states and 283 transitions. [2023-11-29 04:31:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 04:31:42,624 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 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 56 [2023-11-29 04:31:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:42,624 INFO L225 Difference]: With dead ends: 239 [2023-11-29 04:31:42,625 INFO L226 Difference]: Without dead ends: 110 [2023-11-29 04:31:42,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 62 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=888, Invalid=3144, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 04:31:42,625 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 303 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:42,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 29 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:31:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-29 04:31:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 59. [2023-11-29 04:31:42,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2023-11-29 04:31:42,671 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 56 [2023-11-29 04:31:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:42,671 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2023-11-29 04:31:42,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:42,671 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2023-11-29 04:31:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 04:31:42,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:42,672 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:42,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 04:31:42,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 04:31:42,872 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:42,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:42,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1267075902, now seen corresponding path program 12 times [2023-11-29 04:31:42,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:42,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067415871] [2023-11-29 04:31:42,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:42,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:42,887 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:42,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488431963] [2023-11-29 04:31:42,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:31:42,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:42,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:42,889 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:42,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 04:31:43,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-29 04:31:43,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:43,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 04:31:43,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:43,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:31:43,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-11-29 04:31:43,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:43,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2023-11-29 04:31:43,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:43,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 53 treesize of output 58 [2023-11-29 04:31:43,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:43,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 72 [2023-11-29 04:31:44,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:44,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 69 [2023-11-29 04:31:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 46 proven. 144 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-29 04:31:44,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 40 proven. 150 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-29 04:31:44,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:44,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067415871] [2023-11-29 04:31:44,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:44,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488431963] [2023-11-29 04:31:44,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488431963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:44,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:44,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2023-11-29 04:31:44,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818346828] [2023-11-29 04:31:44,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:31:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:31:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:31:44,591 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:46,017 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-11-29 04:31:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:31:46,018 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-29 04:31:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:46,018 INFO L225 Difference]: With dead ends: 66 [2023-11-29 04:31:46,019 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 04:31:46,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 04:31:46,019 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:46,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:31:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 04:31:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-29 04:31:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-11-29 04:31:46,068 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 58 [2023-11-29 04:31:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:46,069 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-11-29 04:31:46,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:46,069 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-11-29 04:31:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 04:31:46,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:46,069 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:46,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 04:31:46,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 04:31:46,270 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:46,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:46,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1746579196, now seen corresponding path program 13 times [2023-11-29 04:31:46,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:46,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225864931] [2023-11-29 04:31:46,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:46,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:46,286 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:46,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625137766] [2023-11-29 04:31:46,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:31:46,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:46,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:46,287 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:46,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 04:31:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:46,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 04:31:46,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 247 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:46,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 247 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:47,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:47,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225864931] [2023-11-29 04:31:47,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:47,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625137766] [2023-11-29 04:31:47,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625137766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:47,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:47,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2023-11-29 04:31:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700339486] [2023-11-29 04:31:47,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:47,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 04:31:47,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 04:31:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 04:31:47,066 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:47,582 INFO L93 Difference]: Finished difference Result 235 states and 285 transitions. [2023-11-29 04:31:47,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 04:31:47,582 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 0 states have call successors, (0), 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 61 [2023-11-29 04:31:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:47,583 INFO L225 Difference]: With dead ends: 235 [2023-11-29 04:31:47,583 INFO L226 Difference]: Without dead ends: 133 [2023-11-29 04:31:47,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 04:31:47,584 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 157 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:47,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 26 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:31:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-29 04:31:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 63. [2023-11-29 04:31:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-11-29 04:31:47,634 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 61 [2023-11-29 04:31:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:47,634 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-11-29 04:31:47,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-11-29 04:31:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 04:31:47,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:47,635 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:47,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 04:31:47,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 04:31:47,836 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:47,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1590031488, now seen corresponding path program 14 times [2023-11-29 04:31:47,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:47,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433367599] [2023-11-29 04:31:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:47,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:47,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:47,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553958268] [2023-11-29 04:31:47,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:31:47,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:47,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:47,852 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:47,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 04:31:48,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:31:48,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:48,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 04:31:48,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:48,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:31:48,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 04:31:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:48,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-29 04:31:48,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:48,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-29 04:31:48,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:48,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-29 04:31:48,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:31:48,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:48,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-29 04:31:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 140 proven. 158 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 04:31:51,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:52,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-29 04:31:52,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-29 04:31:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 135 proven. 153 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 04:31:52,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:52,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433367599] [2023-11-29 04:31:52,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:52,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553958268] [2023-11-29 04:31:52,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553958268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:52,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:52,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 43 [2023-11-29 04:31:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847248151] [2023-11-29 04:31:52,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:52,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 04:31:52,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 04:31:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1640, Unknown=2, NotChecked=0, Total=1806 [2023-11-29 04:31:52,463 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:31:53,475 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2023-11-29 04:31:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 04:31:53,475 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2023-11-29 04:31:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:31:53,476 INFO L225 Difference]: With dead ends: 88 [2023-11-29 04:31:53,476 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 04:31:53,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=191, Invalid=1877, Unknown=2, NotChecked=0, Total=2070 [2023-11-29 04:31:53,477 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:31:53,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 140 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 04:31:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 04:31:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2023-11-29 04:31:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.123076923076923) internal successors, (73), 65 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2023-11-29 04:31:53,534 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 62 [2023-11-29 04:31:53,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:31:53,534 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2023-11-29 04:31:53,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:31:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2023-11-29 04:31:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 04:31:53,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:31:53,534 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:53,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-29 04:31:53,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:53,735 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:31:53,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:53,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1632983350, now seen corresponding path program 15 times [2023-11-29 04:31:53,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:53,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269820555] [2023-11-29 04:31:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:53,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:53,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:31:53,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868969056] [2023-11-29 04:31:53,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:31:53,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:53,753 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:53,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 04:31:54,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-29 04:31:54,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:54,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 04:31:54,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:54,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:31:54,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 04:31:54,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:54,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-29 04:31:54,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:54,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-29 04:31:54,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:54,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 04:31:54,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:54,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 04:31:54,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:31:54,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 52 treesize of output 70 [2023-11-29 04:31:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-29 04:31:55,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 48 proven. 210 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 04:31:55,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:55,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269820555] [2023-11-29 04:31:55,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:31:55,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868969056] [2023-11-29 04:31:55,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868969056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:55,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:31:55,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 42 [2023-11-29 04:31:55,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334837282] [2023-11-29 04:31:55,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:55,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 04:31:55,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:55,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 04:31:55,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 04:31:55,881 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 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) [2023-11-29 04:32:09,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:32:09,985 INFO L93 Difference]: Finished difference Result 352 states and 422 transitions. [2023-11-29 04:32:09,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2023-11-29 04:32:09,986 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 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 65 [2023-11-29 04:32:09,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:32:09,988 INFO L225 Difference]: With dead ends: 352 [2023-11-29 04:32:09,988 INFO L226 Difference]: Without dead ends: 331 [2023-11-29 04:32:09,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18211 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=9299, Invalid=49993, Unknown=0, NotChecked=0, Total=59292 [2023-11-29 04:32:09,992 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 281 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:32:09,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 133 Invalid, 2744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 04:32:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-11-29 04:32:10,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 86. [2023-11-29 04:32:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 85 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:32:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2023-11-29 04:32:10,099 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 65 [2023-11-29 04:32:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:32:10,100 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2023-11-29 04:32:10,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 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) [2023-11-29 04:32:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2023-11-29 04:32:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 04:32:10,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:32:10,100 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:32:10,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-29 04:32:10,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-29 04:32:10,301 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:32:10,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:32:10,301 INFO L85 PathProgramCache]: Analyzing trace with hash 209372160, now seen corresponding path program 16 times [2023-11-29 04:32:10,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:32:10,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739942863] [2023-11-29 04:32:10,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:32:10,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:32:10,318 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:32:10,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051121647] [2023-11-29 04:32:10,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:32:10,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:32:10,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:32:10,319 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:32:10,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 04:32:10,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:32:10,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:32:10,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 04:32:10,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:32:10,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:32:10,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-11-29 04:32:10,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:32:10,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2023-11-29 04:32:10,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:32:10,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 53 treesize of output 58 [2023-11-29 04:32:10,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:32:10,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2023-11-29 04:32:10,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:32:10,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 88 [2023-11-29 04:32:10,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:32:10,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 102 [2023-11-29 04:32:11,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:32:11,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 95 [2023-11-29 04:32:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 71 proven. 244 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 04:32:11,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:32:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 56 proven. 259 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 04:32:12,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:32:12,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739942863] [2023-11-29 04:32:12,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:32:12,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051121647] [2023-11-29 04:32:12,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051121647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:32:12,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:32:12,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2023-11-29 04:32:12,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548595404] [2023-11-29 04:32:12,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:32:12,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 04:32:12,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:32:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 04:32:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:32:12,141 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:32:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:32:14,983 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2023-11-29 04:32:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 04:32:14,984 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 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 69 [2023-11-29 04:32:14,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:32:14,985 INFO L225 Difference]: With dead ends: 94 [2023-11-29 04:32:14,985 INFO L226 Difference]: Without dead ends: 90 [2023-11-29 04:32:14,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 04:32:14,986 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:32:14,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 41 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:32:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-29 04:32:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2023-11-29 04:32:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:32:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-11-29 04:32:15,087 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 69 [2023-11-29 04:32:15,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:32:15,087 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-11-29 04:32:15,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:32:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-11-29 04:32:15,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-29 04:32:15,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:32:15,088 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:32:15,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 04:32:15,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-29 04:32:15,289 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:32:15,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:32:15,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1642442490, now seen corresponding path program 17 times [2023-11-29 04:32:15,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:32:15,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434312489] [2023-11-29 04:32:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:32:15,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:32:15,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:32:15,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046279160] [2023-11-29 04:32:15,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:32:15,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:32:15,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:32:15,308 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:32:15,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 04:32:16,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-11-29 04:32:16,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:32:16,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 04:32:16,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:32:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 376 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:32:16,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:32:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 376 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:32:17,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:32:17,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434312489] [2023-11-29 04:32:17,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:32:17,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046279160] [2023-11-29 04:32:17,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046279160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:32:17,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:32:17,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 52 [2023-11-29 04:32:17,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341160987] [2023-11-29 04:32:17,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:32:17,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 04:32:17,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:32:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 04:32:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=645, Invalid=2007, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 04:32:17,176 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 52 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:32:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:32:18,879 INFO L93 Difference]: Finished difference Result 488 states and 593 transitions. [2023-11-29 04:32:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 04:32:18,879 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 52 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 72 [2023-11-29 04:32:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:32:18,881 INFO L225 Difference]: With dead ends: 488 [2023-11-29 04:32:18,881 INFO L226 Difference]: Without dead ends: 192 [2023-11-29 04:32:18,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 78 SyntacticMatches, 14 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1982, Invalid=7720, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 04:32:18,882 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 594 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:32:18,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 27 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:32:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-29 04:32:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 75. [2023-11-29 04:32:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.135135135135135) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:32:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2023-11-29 04:32:18,989 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 72 [2023-11-29 04:32:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:32:18,989 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2023-11-29 04:32:18,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 52 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:32:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2023-11-29 04:32:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-29 04:32:18,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:32:18,990 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:32:18,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 04:32:19,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:32:19,190 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:32:19,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:32:19,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1778274694, now seen corresponding path program 18 times [2023-11-29 04:32:19,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:32:19,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541063053] [2023-11-29 04:32:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:32:19,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:32:19,210 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:32:19,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859864301] [2023-11-29 04:32:19,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:32:19,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:32:19,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:32:19,211 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:32:19,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 04:32:23,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-29 04:32:23,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:32:23,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-29 04:32:23,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:32:23,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:32:23,327 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 04:32:23,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 04:32:23,378 INFO L349 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2023-11-29 04:32:23,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2023-11-29 04:32:23,433 INFO L349 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2023-11-29 04:32:23,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2023-11-29 04:32:23,488 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-11-29 04:32:23,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2023-11-29 04:32:23,554 INFO L349 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2023-11-29 04:32:23,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 48 [2023-11-29 04:32:23,638 INFO L349 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2023-11-29 04:32:23,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 54 treesize of output 62 [2023-11-29 04:32:23,732 INFO L349 Elim1Store]: treesize reduction 96, result has 15.0 percent of original size [2023-11-29 04:32:23,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 63 treesize of output 74 [2023-11-29 04:32:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 221 proven. 211 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-29 04:32:47,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:32:50,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2023-11-29 04:32:50,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 75 [2023-11-29 04:32:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 98 proven. 414 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:32:50,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:32:50,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541063053] [2023-11-29 04:32:50,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:32:50,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859864301] [2023-11-29 04:32:50,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859864301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:32:50,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:32:50,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 42] total 68 [2023-11-29 04:32:50,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658917708] [2023-11-29 04:32:50,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:32:50,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-29 04:32:50,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:32:50,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-29 04:32:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=3982, Unknown=8, NotChecked=0, Total=4556 [2023-11-29 04:32:50,796 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 68 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 68 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:32:55,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:05,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:09,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:16,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:24,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:33,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:46,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:33:51,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:03,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:08,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:16,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:20,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:25,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:38,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:43,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:51,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:55,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:34:59,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:35:07,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:35:16,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:35:18,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:35:23,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:35:50,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:35:59,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:36:03,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-29 04:36:07,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:36:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:07,220 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2023-11-29 04:36:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 04:36:07,220 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 68 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 74 [2023-11-29 04:36:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:07,221 INFO L225 Difference]: With dead ends: 110 [2023-11-29 04:36:07,221 INFO L226 Difference]: Without dead ends: 83 [2023-11-29 04:36:07,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 117.5s TimeCoverageRelationStatistics Valid=1183, Invalid=7902, Unknown=35, NotChecked=0, Total=9120 [2023-11-29 04:36:07,222 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 44 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:07,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 88 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1592 Invalid, 24 Unknown, 0 Unchecked, 105.0s Time] [2023-11-29 04:36:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-29 04:36:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2023-11-29 04:36:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.12987012987013) internal successors, (87), 77 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:36:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-11-29 04:36:07,326 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 74 [2023-11-29 04:36:07,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:07,326 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-11-29 04:36:07,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 68 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:36:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-11-29 04:36:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-29 04:36:07,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:07,326 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:07,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-29 04:36:07,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 04:36:07,527 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:07,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1599428612, now seen corresponding path program 19 times [2023-11-29 04:36:07,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:07,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830818346] [2023-11-29 04:36:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:07,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:07,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:36:07,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302596206] [2023-11-29 04:36:07,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:36:07,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:07,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:07,551 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:07,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 04:36:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 04:36:07,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 425 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:36:08,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 425 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:36:08,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:08,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830818346] [2023-11-29 04:36:08,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:36:08,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302596206] [2023-11-29 04:36:08,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302596206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:08,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:36:08,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2023-11-29 04:36:08,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379494015] [2023-11-29 04:36:08,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:08,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 04:36:08,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 04:36:08,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 04:36:08,946 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:36:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:10,110 INFO L93 Difference]: Finished difference Result 353 states and 435 transitions. [2023-11-29 04:36:10,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 04:36:10,111 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-11-29 04:36:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:10,112 INFO L225 Difference]: With dead ends: 353 [2023-11-29 04:36:10,112 INFO L226 Difference]: Without dead ends: 196 [2023-11-29 04:36:10,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1215, Invalid=3897, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 04:36:10,113 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 304 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:10,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 25 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:36:10,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-29 04:36:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 79. [2023-11-29 04:36:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 78 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:36:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2023-11-29 04:36:10,221 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 77 [2023-11-29 04:36:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:10,222 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2023-11-29 04:36:10,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:36:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2023-11-29 04:36:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-29 04:36:10,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:10,222 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:10,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-29 04:36:10,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 04:36:10,423 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:10,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:10,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1103259008, now seen corresponding path program 20 times [2023-11-29 04:36:10,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:10,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135667251] [2023-11-29 04:36:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:10,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:10,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:36:10,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923594618] [2023-11-29 04:36:10,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:36:10,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:10,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:10,446 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:10,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 04:36:10,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:36:10,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:36:10,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 04:36:10,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:10,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:36:10,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:10,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-29 04:36:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:10,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:10,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:10,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:36:10,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-29 04:36:10,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:10,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:10,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:10,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:10,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:10,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:36:10,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-29 04:36:11,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:36:11,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-29 04:36:11,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:36:11,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2023-11-29 04:36:11,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:11,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:36:11,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2023-11-29 04:36:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:36:12,035 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:36:12,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2023-11-29 04:36:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 243 proven. 258 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-29 04:36:34,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:48,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-29 04:36:48,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-29 04:36:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 229 proven. 251 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-29 04:36:48,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:48,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135667251] [2023-11-29 04:36:48,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:36:48,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923594618] [2023-11-29 04:36:48,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923594618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:48,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:36:48,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 53 [2023-11-29 04:36:48,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927177062] [2023-11-29 04:36:48,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:48,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 04:36:48,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:48,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 04:36:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2539, Unknown=4, NotChecked=0, Total=2756 [2023-11-29 04:36:48,889 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 53 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:36:51,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:36:55,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 04:37:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:37:04,312 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2023-11-29 04:37:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 04:37:04,313 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 53 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2023-11-29 04:37:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:37:04,313 INFO L225 Difference]: With dead ends: 110 [2023-11-29 04:37:04,313 INFO L226 Difference]: Without dead ends: 83 [2023-11-29 04:37:04,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=242, Invalid=2834, Unknown=4, NotChecked=0, Total=3080 [2023-11-29 04:37:04,314 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2023-11-29 04:37:04,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 158 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1630 Invalid, 1 Unknown, 0 Unchecked, 14.8s Time] [2023-11-29 04:37:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-29 04:37:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2023-11-29 04:37:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.123456790123457) internal successors, (91), 81 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2023-11-29 04:37:04,441 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 78 [2023-11-29 04:37:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:37:04,442 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2023-11-29 04:37:04,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 53 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2023-11-29 04:37:04,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-29 04:37:04,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:37:04,442 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:37:04,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 04:37:04,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 04:37:04,643 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:37:04,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:04,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1340257482, now seen corresponding path program 21 times [2023-11-29 04:37:04,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:37:04,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957367007] [2023-11-29 04:37:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:04,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:37:04,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:37:04,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85445019] [2023-11-29 04:37:04,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:37:04,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:37:04,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:37:04,665 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:37:04,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 04:37:06,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-29 04:37:06,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:37:06,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 04:37:06,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:06,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:37:06,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-11-29 04:37:06,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:06,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2023-11-29 04:37:06,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:06,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 53 treesize of output 58 [2023-11-29 04:37:06,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:06,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2023-11-29 04:37:07,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:07,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 88 [2023-11-29 04:37:07,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:07,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 103 [2023-11-29 04:37:07,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:07,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 117 [2023-11-29 04:37:08,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:08,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 108 treesize of output 108 [2023-11-29 04:37:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 101 proven. 339 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 04:37:09,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 80 proven. 360 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-29 04:37:10,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:37:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957367007] [2023-11-29 04:37:10,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:37:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85445019] [2023-11-29 04:37:10,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85445019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:10,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:37:10,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2023-11-29 04:37:10,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077697102] [2023-11-29 04:37:10,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:10,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 04:37:10,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:37:10,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 04:37:10,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 04:37:10,146 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 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) [2023-11-29 04:37:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:37:15,424 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-11-29 04:37:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 04:37:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 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) Word has length 81 [2023-11-29 04:37:15,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:37:15,426 INFO L225 Difference]: With dead ends: 89 [2023-11-29 04:37:15,426 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 04:37:15,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=626, Invalid=2796, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 04:37:15,427 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 04:37:15,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 50 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 04:37:15,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 04:37:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-29 04:37:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.130952380952381) internal successors, (95), 84 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:37:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2023-11-29 04:37:15,574 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 81 [2023-11-29 04:37:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:37:15,574 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2023-11-29 04:37:15,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 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) [2023-11-29 04:37:15,574 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2023-11-29 04:37:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 04:37:15,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:37:15,575 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:37:15,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-29 04:37:15,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 04:37:15,776 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:37:15,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:37:15,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1161284612, now seen corresponding path program 22 times [2023-11-29 04:37:15,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:37:15,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641372209] [2023-11-29 04:37:15,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:37:15,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:37:15,802 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 04:37:15,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867125627] [2023-11-29 04:37:15,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:37:15,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:37:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:37:15,803 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:37:15,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 04:37:16,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:37:16,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:37:16,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-29 04:37:16,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:37:16,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 04:37:16,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-11-29 04:37:16,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:16,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2023-11-29 04:37:16,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:16,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 53 treesize of output 58 [2023-11-29 04:37:16,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:16,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2023-11-29 04:37:16,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:16,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 88 [2023-11-29 04:37:16,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:16,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 103 [2023-11-29 04:37:16,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:16,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 101 treesize of output 118 [2023-11-29 04:37:16,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:16,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 112 treesize of output 132 [2023-11-29 04:37:18,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:37:18,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 118 treesize of output 103 [2023-11-29 04:37:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 109 proven. 540 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 04:37:19,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:37:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 81 proven. 568 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 04:37:20,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:37:20,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641372209] [2023-11-29 04:37:20,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 04:37:20,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867125627] [2023-11-29 04:37:20,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867125627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:37:20,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:37:20,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2023-11-29 04:37:20,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972135908] [2023-11-29 04:37:20,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:37:20,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-29 04:37:20,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:37:20,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-29 04:37:20,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=3939, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 04:37:20,977 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:19,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2023-11-29 04:43:19,243 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-29 04:43:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1096 states. [2023-11-29 04:43:19,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1260 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 1159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625087 ImplicationChecksByTransitivity, 332.5s TimeCoverageRelationStatistics Valid=100196, Invalid=1246564, Unknown=0, NotChecked=0, Total=1346760 [2023-11-29 04:43:19,312 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 342 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 14483 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 14599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 14483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:19,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 47 Invalid, 14599 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [116 Valid, 14483 Invalid, 0 Unknown, 0 Unchecked, 23.2s Time] [2023-11-29 04:43:19,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-29 04:43:19,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 04:43:19,513 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:199) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:247) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 55 more [2023-11-29 04:43:19,516 INFO L158 Benchmark]: Toolchain (without parser) took 793578.21ms. Allocated memory was 176.2MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 130.4MB in the beginning and 734.1MB in the end (delta: -603.7MB). Peak memory consumption was 564.9MB. Max. memory is 16.1GB. [2023-11-29 04:43:19,516 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 117.4MB. Free memory was 84.3MB in the beginning and 84.2MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 04:43:19,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.44ms. Allocated memory is still 176.2MB. Free memory was 130.4MB in the beginning and 119.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 04:43:19,517 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.03ms. Allocated memory is still 176.2MB. Free memory was 119.9MB in the beginning and 117.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 04:43:19,517 INFO L158 Benchmark]: Boogie Preprocessor took 43.96ms. Allocated memory is still 176.2MB. Free memory was 117.9MB in the beginning and 115.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 04:43:19,517 INFO L158 Benchmark]: RCFGBuilder took 321.25ms. Allocated memory is still 176.2MB. Free memory was 115.8MB in the beginning and 103.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 04:43:19,517 INFO L158 Benchmark]: TraceAbstraction took 792952.36ms. Allocated memory was 176.2MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 101.8MB in the beginning and 734.1MB in the end (delta: -632.3MB). Peak memory consumption was 535.5MB. Max. memory is 16.1GB. [2023-11-29 04:43:19,518 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 117.4MB. Free memory was 84.3MB in the beginning and 84.2MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 216.44ms. Allocated memory is still 176.2MB. Free memory was 130.4MB in the beginning and 119.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.03ms. Allocated memory is still 176.2MB. Free memory was 119.9MB in the beginning and 117.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.96ms. Allocated memory is still 176.2MB. Free memory was 117.9MB in the beginning and 115.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 321.25ms. Allocated memory is still 176.2MB. Free memory was 115.8MB in the beginning and 103.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 792952.36ms. Allocated memory was 176.2MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 101.8MB in the beginning and 734.1MB in the end (delta: -632.3MB). Peak memory consumption was 535.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s4if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:43:21,178 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:43:21,243 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-29 04:43:21,264 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:43:21,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:43:21,293 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:43:21,294 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:43:21,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:43:21,295 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:43:21,296 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:43:21,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:43:21,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:43:21,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:43:21,298 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:43:21,299 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:43:21,299 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:43:21,300 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:43:21,301 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:43:21,301 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:43:21,302 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:43:21,302 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:43:21,303 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:43:21,303 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:43:21,304 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 04:43:21,304 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 04:43:21,305 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 04:43:21,305 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:43:21,305 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:43:21,306 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:43:21,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:43:21,307 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:43:21,307 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:43:21,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:43:21,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:43:21,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:43:21,308 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:43:21,308 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:43:21,309 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 04:43:21,309 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 04:43:21,309 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:43:21,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:43:21,310 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:43:21,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:43:21,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:43:21,310 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 04:43:21,310 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_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e [2023-11-29 04:43:21,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:43:21,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:43:21,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:43:21,630 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:43:21,631 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:43:21,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-fpi/s4if.c [2023-11-29 04:43:24,428 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:43:24,599 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:43:24,599 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/sv-benchmarks/c/array-fpi/s4if.c [2023-11-29 04:43:24,607 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/data/0e4a6d1b8/e44ddf9362b44cd3b9d7be968bf46b7c/FLAG7e2bab4a8 [2023-11-29 04:43:24,622 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/data/0e4a6d1b8/e44ddf9362b44cd3b9d7be968bf46b7c [2023-11-29 04:43:24,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:43:24,626 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:43:24,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:43:24,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:43:24,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:43:24,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a0c1c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24, skipping insertion in model container [2023-11-29 04:43:24,635 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,655 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:43:24,799 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_8bfb54ea-7625-4e3f-80da-5662c59b5f37/sv-benchmarks/c/array-fpi/s4if.c[587,600] [2023-11-29 04:43:24,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:43:24,828 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:43:24,839 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_8bfb54ea-7625-4e3f-80da-5662c59b5f37/sv-benchmarks/c/array-fpi/s4if.c[587,600] [2023-11-29 04:43:24,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:43:24,866 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:43:24,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24 WrapperNode [2023-11-29 04:43:24,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:43:24,868 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:43:24,868 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:43:24,868 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:43:24,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,882 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,905 INFO L138 Inliner]: procedures = 21, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2023-11-29 04:43:24,905 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:43:24,906 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:43:24,906 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:43:24,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:43:24,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,919 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,933 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 7, 4, 6]. 37 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 1, 3]. [2023-11-29 04:43:24,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,943 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,946 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,954 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:43:24,955 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:43:24,955 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:43:24,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:43:24,957 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (1/1) ... [2023-11-29 04:43:24,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:43:24,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:43:24,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:43:25,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:43:25,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:43:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 04:43:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 04:43:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 04:43:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 04:43:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:43:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8#0 [2023-11-29 04:43:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8#1 [2023-11-29 04:43:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8#2 [2023-11-29 04:43:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8#3 [2023-11-29 04:43:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:43:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 04:43:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 04:43:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 04:43:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 04:43:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:43:25,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:43:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8#0 [2023-11-29 04:43:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8#1 [2023-11-29 04:43:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8#2 [2023-11-29 04:43:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8#3 [2023-11-29 04:43:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:43:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 04:43:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 04:43:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 04:43:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 04:43:25,144 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:43:25,146 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:43:25,486 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:43:25,516 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:43:25,517 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 04:43:25,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:43:25 BoogieIcfgContainer [2023-11-29 04:43:25,517 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:43:25,519 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:43:25,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:43:25,522 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:43:25,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:43:24" (1/3) ... [2023-11-29 04:43:25,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fefb7ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:43:25, skipping insertion in model container [2023-11-29 04:43:25,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:43:24" (2/3) ... [2023-11-29 04:43:25,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fefb7ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:43:25, skipping insertion in model container [2023-11-29 04:43:25,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:43:25" (3/3) ... [2023-11-29 04:43:25,525 INFO L112 eAbstractionObserver]: Analyzing ICFG s4if.c [2023-11-29 04:43:25,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:43:25,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:43:25,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:43:25,584 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3000ee28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:43:25,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:43:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:25,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 04:43:25,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:25,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:25,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:25,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:25,603 INFO L85 PathProgramCache]: Analyzing trace with hash -278767546, now seen corresponding path program 1 times [2023-11-29 04:43:25,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:43:25,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373511839] [2023-11-29 04:43:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:43:25,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:25,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:43:25,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:43:25,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 04:43:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:25,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 04:43:25,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:25,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:43:25,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:43:25,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373511839] [2023-11-29 04:43:25,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373511839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:43:25,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:43:25,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:43:25,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773001128] [2023-11-29 04:43:25,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:43:25,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:43:25,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:43:25,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:43:25,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:43:25,805 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:25,834 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2023-11-29 04:43:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:43:25,838 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 04:43:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:25,845 INFO L225 Difference]: With dead ends: 29 [2023-11-29 04:43:25,846 INFO L226 Difference]: Without dead ends: 13 [2023-11-29 04:43:25,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:43:25,852 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:25,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:43:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-29 04:43:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-29 04:43:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-29 04:43:25,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-11-29 04:43:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:25,886 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-29 04:43:25,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:25,887 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-29 04:43:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 04:43:25,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:25,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:25,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:43:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:26,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:26,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:26,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1088114172, now seen corresponding path program 1 times [2023-11-29 04:43:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:43:26,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818626368] [2023-11-29 04:43:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:43:26,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:26,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:43:26,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:43:26,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 04:43:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:26,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:43:26,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:26,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:43:26,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:43:26,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818626368] [2023-11-29 04:43:26,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818626368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:43:26,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:43:26,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 04:43:26,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932234052] [2023-11-29 04:43:26,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:43:26,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:43:26,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:43:26,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:43:26,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:43:26,368 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:26,655 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2023-11-29 04:43:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:43:26,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 04:43:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:26,665 INFO L225 Difference]: With dead ends: 25 [2023-11-29 04:43:26,665 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 04:43:26,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 04:43:26,667 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:26,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:43:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 04:43:26,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2023-11-29 04:43:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-29 04:43:26,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2023-11-29 04:43:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:26,675 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-29 04:43:26,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-29 04:43:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 04:43:26,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:26,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:26,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-29 04:43:26,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:26,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:26,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash 54367998, now seen corresponding path program 1 times [2023-11-29 04:43:26,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:43:26,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873480488] [2023-11-29 04:43:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:43:26,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:26,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:43:26,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:43:26,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 04:43:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:26,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:43:26,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:27,113 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:43:27,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2023-11-29 04:43:27,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:43:27,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:27,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 37 [2023-11-29 04:43:27,704 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:27,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 49 [2023-11-29 04:43:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:27,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:28,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2023-11-29 04:43:28,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2023-11-29 04:43:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:28,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:43:28,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873480488] [2023-11-29 04:43:28,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873480488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:28,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:43:28,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-29 04:43:28,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971636993] [2023-11-29 04:43:28,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:28,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:43:28,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:43:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:43:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:43:28,667 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:30,006 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2023-11-29 04:43:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:43:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 14 [2023-11-29 04:43:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:30,009 INFO L225 Difference]: With dead ends: 37 [2023-11-29 04:43:30,009 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 04:43:30,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:43:30,011 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:30,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 27 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:43:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 04:43:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-11-29 04:43:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-29 04:43:30,021 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2023-11-29 04:43:30,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:30,021 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-29 04:43:30,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-29 04:43:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 04:43:30,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:30,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:30,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 04:43:30,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:30,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:30,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 111626300, now seen corresponding path program 1 times [2023-11-29 04:43:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:43:30,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483654027] [2023-11-29 04:43:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:43:30,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:43:30,226 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:43:30,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 04:43:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:30,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:43:30,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:30,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 04:43:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:30,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:30,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-29 04:43:30,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-29 04:43:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:30,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:43:30,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483654027] [2023-11-29 04:43:30,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483654027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:30,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:43:30,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 04:43:30,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341173328] [2023-11-29 04:43:30,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:30,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:43:30,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:43:30,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:43:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:43:30,474 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:30,712 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-11-29 04:43:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:43:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 04:43:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:30,714 INFO L225 Difference]: With dead ends: 32 [2023-11-29 04:43:30,714 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 04:43:30,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:43:30,716 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:30,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:43:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 04:43:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-29 04:43:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-29 04:43:30,723 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2023-11-29 04:43:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:30,724 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-29 04:43:30,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-29 04:43:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 04:43:30,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:30,725 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:30,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 04:43:30,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:30,926 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:30,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:30,926 INFO L85 PathProgramCache]: Analyzing trace with hash -230177790, now seen corresponding path program 2 times [2023-11-29 04:43:30,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:43:30,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424241016] [2023-11-29 04:43:30,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:43:30,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:30,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:43:30,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:43:30,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 04:43:30,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:43:30,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:43:31,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:43:31,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:31,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:31,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:43:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424241016] [2023-11-29 04:43:31,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424241016] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:31,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:43:31,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-11-29 04:43:31,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031763457] [2023-11-29 04:43:31,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:31,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:43:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:43:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:43:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:43:31,596 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:32,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:32,642 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-11-29 04:43:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:43:32,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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 15 [2023-11-29 04:43:32,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:32,644 INFO L225 Difference]: With dead ends: 49 [2023-11-29 04:43:32,644 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 04:43:32,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:43:32,645 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 113 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:32,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 23 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:43:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 04:43:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2023-11-29 04:43:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-29 04:43:32,651 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2023-11-29 04:43:32,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:32,652 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-29 04:43:32,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-29 04:43:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 04:43:32,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:32,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:32,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 04:43:32,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:32,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:32,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2013377864, now seen corresponding path program 3 times [2023-11-29 04:43:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:43:32,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556068404] [2023-11-29 04:43:32,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:43:32,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:32,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:43:32,855 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:43:32,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 04:43:32,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:43:32,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:43:32,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:43:32,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:33,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:33,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:43:33,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556068404] [2023-11-29 04:43:33,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556068404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:33,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:43:33,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-11-29 04:43:33,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606743334] [2023-11-29 04:43:33,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:33,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:43:33,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:43:33,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:43:33,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:43:33,248 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:33,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:33,748 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-11-29 04:43:33,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:43:33,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 04:43:33,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:33,758 INFO L225 Difference]: With dead ends: 42 [2023-11-29 04:43:33,758 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 04:43:33,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:43:33,759 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:33,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:43:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 04:43:33,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-11-29 04:43:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-29 04:43:33,768 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2023-11-29 04:43:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:33,768 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-29 04:43:33,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-29 04:43:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 04:43:33,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:33,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:33,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 04:43:33,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:33,970 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:33,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:33,970 INFO L85 PathProgramCache]: Analyzing trace with hash -919717436, now seen corresponding path program 4 times [2023-11-29 04:43:33,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:43:33,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273390845] [2023-11-29 04:43:33,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:43:33,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:33,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:43:33,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:43:33,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 04:43:34,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:43:34,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:43:34,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 04:43:34,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:34,119 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:43:34,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2023-11-29 04:43:34,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 04:43:34,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:34,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 37 [2023-11-29 04:43:34,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:34,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 51 [2023-11-29 04:43:35,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:35,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 77 [2023-11-29 04:43:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:35,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:36,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 120 [2023-11-29 04:43:36,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:36,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 199 [2023-11-29 04:43:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:37,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:43:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273390845] [2023-11-29 04:43:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273390845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:37,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:43:37,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2023-11-29 04:43:37,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74685616] [2023-11-29 04:43:37,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:37,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:43:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:43:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:43:37,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:43:37,498 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:45,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 04:43:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:45,892 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2023-11-29 04:43:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:43:45,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 04:43:45,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:45,894 INFO L225 Difference]: With dead ends: 34 [2023-11-29 04:43:45,894 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 04:43:45,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 04:43:45,895 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:45,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2023-11-29 04:43:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 04:43:45,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-29 04:43:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-29 04:43:45,901 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2023-11-29 04:43:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:45,901 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-29 04:43:45,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-29 04:43:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 04:43:45,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:45,902 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:45,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 04:43:46,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:46,103 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:46,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash -862459134, now seen corresponding path program 1 times [2023-11-29 04:43:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:43:46,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635434121] [2023-11-29 04:43:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:43:46,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:46,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:43:46,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:43:46,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 04:43:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:46,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:43:46,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:46,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 04:43:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:46,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:46,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 04:43:46,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 04:43:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:46,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:43:46,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635434121] [2023-11-29 04:43:46,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635434121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:46,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:43:46,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-11-29 04:43:46,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499314374] [2023-11-29 04:43:46,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:46,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 04:43:46,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:43:46,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 04:43:46,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:43:46,497 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:46,882 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-11-29 04:43:46,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:43:46,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 18 [2023-11-29 04:43:46,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:46,892 INFO L225 Difference]: With dead ends: 37 [2023-11-29 04:43:46,892 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 04:43:46,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:43:46,893 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:46,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 50 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:43:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 04:43:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-11-29 04:43:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-29 04:43:46,898 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2023-11-29 04:43:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:46,899 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-29 04:43:46,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-29 04:43:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 04:43:46,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:46,899 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:46,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-29 04:43:47,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:47,100 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:47,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:47,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1651358520, now seen corresponding path program 5 times [2023-11-29 04:43:47,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:43:47,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627070033] [2023-11-29 04:43:47,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:43:47,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:47,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:43:47,102 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:43:47,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 04:43:47,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 04:43:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:43:47,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:43:47,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:47,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:48,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:43:48,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627070033] [2023-11-29 04:43:48,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627070033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:48,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:43:48,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-11-29 04:43:48,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733032928] [2023-11-29 04:43:48,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:48,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:43:48,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:43:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:43:48,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:43:48,114 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:49,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:49,236 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2023-11-29 04:43:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:43:49,237 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-29 04:43:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:49,238 INFO L225 Difference]: With dead ends: 51 [2023-11-29 04:43:49,238 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 04:43:49,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2023-11-29 04:43:49,239 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 103 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:49,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 26 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:43:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 04:43:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2023-11-29 04:43:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-29 04:43:49,247 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2023-11-29 04:43:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:49,247 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-29 04:43:49,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:43:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-29 04:43:49,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 04:43:49,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:49,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:49,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 04:43:49,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:49,449 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:49,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:49,450 INFO L85 PathProgramCache]: Analyzing trace with hash 472759102, now seen corresponding path program 6 times [2023-11-29 04:43:49,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:43:49,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285668908] [2023-11-29 04:43:49,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:43:49,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:43:49,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:43:49,451 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:43:49,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 04:43:49,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 04:43:49,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:43:49,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 04:43:49,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:49,656 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:43:49,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2023-11-29 04:43:49,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 04:43:50,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:50,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 37 [2023-11-29 04:43:50,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:50,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 51 [2023-11-29 04:43:50,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:50,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 79 [2023-11-29 04:43:51,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:51,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 133 [2023-11-29 04:43:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:51,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:55,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 223 [2023-11-29 04:43:55,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:43:55,132 INFO L378 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 406 treesize of output 392 [2023-11-29 04:43:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:43:56,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:43:56,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285668908] [2023-11-29 04:43:56,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285668908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:56,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:43:56,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2023-11-29 04:43:56,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376353817] [2023-11-29 04:43:56,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:56,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 04:43:56,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:43:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 04:43:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 04:43:56,933 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:44:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:44:09,280 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-11-29 04:44:09,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 04:44:09,283 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 04:44:09,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:44:09,283 INFO L225 Difference]: With dead ends: 47 [2023-11-29 04:44:09,283 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 04:44:09,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 04:44:09,285 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:44:09,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 38 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 04:44:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 04:44:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2023-11-29 04:44:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:44:09,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-29 04:44:09,293 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2023-11-29 04:44:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:44:09,293 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-29 04:44:09,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:44:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-29 04:44:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 04:44:09,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:44:09,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:44:09,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-29 04:44:09,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:44:09,495 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:44:09,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:44:09,495 INFO L85 PathProgramCache]: Analyzing trace with hash 530017404, now seen corresponding path program 2 times [2023-11-29 04:44:09,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:44:09,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881468711] [2023-11-29 04:44:09,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:44:09,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:44:09,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:44:09,497 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:44:09,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-29 04:44:09,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:44:09,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:44:09,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:44:09,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:44:09,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 04:44:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:44:09,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:44:09,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-29 04:44:09,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-29 04:44:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:44:09,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 04:44:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881468711] [2023-11-29 04:44:09,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881468711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:44:09,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:44:09,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2023-11-29 04:44:09,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111750234] [2023-11-29 04:44:09,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:44:09,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:44:09,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 04:44:09,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:44:09,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:44:09,995 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:44:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:44:10,399 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2023-11-29 04:44:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:44:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 04:44:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:44:10,401 INFO L225 Difference]: With dead ends: 45 [2023-11-29 04:44:10,401 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 04:44:10,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:44:10,402 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:44:10,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 55 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:44:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 04:44:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-29 04:44:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:44:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-11-29 04:44:10,409 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2023-11-29 04:44:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:44:10,409 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-11-29 04:44:10,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:44:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-11-29 04:44:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 04:44:10,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:44:10,410 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:44:10,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-29 04:44:10,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:44:10,612 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:44:10,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:44:10,613 INFO L85 PathProgramCache]: Analyzing trace with hash 152727940, now seen corresponding path program 7 times [2023-11-29 04:44:10,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 04:44:10,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436564011] [2023-11-29 04:44:10,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:44:10,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 04:44:10,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 04:44:10,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 04:44:10,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bfb54ea-7625-4e3f-80da-5662c59b5f37/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-29 04:44:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:44:10,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 04:44:10,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:44:10,826 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:44:10,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2023-11-29 04:44:11,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 04:44:11,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:44:11,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 37 [2023-11-29 04:44:11,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:44:11,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 51 [2023-11-29 04:44:12,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:44:12,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 79 [2023-11-29 04:44:12,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:44:12,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 135 [2023-11-29 04:44:12,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:44:12,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 245 [2023-11-29 04:44:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:44:12,820 INFO L327 TraceCheckSpWp]: Computing backward predicates...