./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/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_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/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_7191f0fa-9e07-4936-ae58-ae68d97d8be3/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 ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:21:42,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:21:42,350 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:21:42,354 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:21:42,355 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:21:42,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:21:42,382 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:21:42,383 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:21:42,383 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:21:42,384 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:21:42,385 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:21:42,385 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:21:42,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:21:42,387 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:21:42,387 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:21:42,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:21:42,388 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:21:42,389 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:21:42,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:21:42,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:21:42,390 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:21:42,391 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:21:42,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:21:42,392 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:21:42,393 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:21:42,393 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:21:42,393 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:21:42,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:21:42,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:21:42,395 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:21:42,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:21:42,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:42,396 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:21:42,396 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:21:42,397 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:21:42,397 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:21:42,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:21:42,397 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:21:42,397 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:21:42,398 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:21:42,398 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:21:42,398 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:21:42,399 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_7191f0fa-9e07-4936-ae58-ae68d97d8be3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e [2023-11-28 20:21:42,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:21:42,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:21:42,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:21:42,680 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:21:42,681 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:21:42,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-crafted/zero_sum4.c [2023-11-28 20:21:45,614 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:21:45,782 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:21:45,782 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/sv-benchmarks/c/array-crafted/zero_sum4.c [2023-11-28 20:21:45,790 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/data/9cc113d8e/39f198ef413548f39396f36589d4074c/FLAG02d21826d [2023-11-28 20:21:45,805 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/data/9cc113d8e/39f198ef413548f39396f36589d4074c [2023-11-28 20:21:45,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:21:45,809 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:21:45,810 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:45,810 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:21:45,816 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:21:45,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:45" (1/1) ... [2023-11-28 20:21:45,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22bbecb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:45, skipping insertion in model container [2023-11-28 20:21:45,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:21:45" (1/1) ... [2023-11-28 20:21:45,841 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:21:45,998 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_7191f0fa-9e07-4936-ae58-ae68d97d8be3/sv-benchmarks/c/array-crafted/zero_sum4.c[400,413] [2023-11-28 20:21:46,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:46,033 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:21:46,045 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_7191f0fa-9e07-4936-ae58-ae68d97d8be3/sv-benchmarks/c/array-crafted/zero_sum4.c[400,413] [2023-11-28 20:21:46,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:21:46,071 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:21:46,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46 WrapperNode [2023-11-28 20:21:46,072 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:21:46,073 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:46,073 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:21:46,073 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:21:46,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,111 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 130 [2023-11-28 20:21:46,112 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:21:46,112 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:21:46,113 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:21:46,113 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:21:46,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,129 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,145 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-28 20:21:46,145 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,151 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,157 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:21:46,162 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:21:46,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:21:46,163 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:21:46,163 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (1/1) ... [2023-11-28 20:21:46,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:21:46,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:46,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:21:46,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:21:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:21:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:21:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:21:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:21:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:21:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:21:46,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:21:46,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:21:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:21:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:21:46,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:21:46,317 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:21:46,320 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:21:46,507 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:21:46,552 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:21:46,553 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-28 20:21:46,553 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:46 BoogieIcfgContainer [2023-11-28 20:21:46,553 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:21:46,557 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:21:46,557 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:21:46,560 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:21:46,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:21:45" (1/3) ... [2023-11-28 20:21:46,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34514b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:46, skipping insertion in model container [2023-11-28 20:21:46,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:21:46" (2/3) ... [2023-11-28 20:21:46,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34514b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:21:46, skipping insertion in model container [2023-11-28 20:21:46,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:21:46" (3/3) ... [2023-11-28 20:21:46,564 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2023-11-28 20:21:46,584 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:21:46,584 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:21:46,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:21:46,643 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;@12dc066f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:21:46,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:21:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 25 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) [2023-11-28 20:21:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-28 20:21:46,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:46,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:46,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:46,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1145627675, now seen corresponding path program 1 times [2023-11-28 20:21:46,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:46,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241558637] [2023-11-28 20:21:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:46,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:46,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:46,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241558637] [2023-11-28 20:21:46,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241558637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:46,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:46,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:21:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987344053] [2023-11-28 20:21:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:46,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:21:46,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:46,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:21:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:21:46,900 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 25 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) Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 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) [2023-11-28 20:21:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:46,948 INFO L93 Difference]: Finished difference Result 49 states and 84 transitions. [2023-11-28 20:21:46,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:21:46,950 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 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 [2023-11-28 20:21:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:46,957 INFO L225 Difference]: With dead ends: 49 [2023-11-28 20:21:46,957 INFO L226 Difference]: Without dead ends: 23 [2023-11-28 20:21:46,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:21:46,964 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:46,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:21:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-28 20:21:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-28 20:21:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-11-28 20:21:46,995 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 22 [2023-11-28 20:21:46,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:46,996 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-11-28 20:21:46,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 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) [2023-11-28 20:21:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-11-28 20:21:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-28 20:21:46,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:46,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:46,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:21:46,998 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:46,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:46,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1559691955, now seen corresponding path program 1 times [2023-11-28 20:21:46,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:47,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44184903] [2023-11-28 20:21:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:47,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:47,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:47,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44184903] [2023-11-28 20:21:47,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44184903] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:47,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:47,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:21:47,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020787493] [2023-11-28 20:21:47,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:47,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:21:47,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:47,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:21:47,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:47,130 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2023-11-28 20:21:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:47,177 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2023-11-28 20:21:47,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:21:47,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 [2023-11-28 20:21:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:47,179 INFO L225 Difference]: With dead ends: 44 [2023-11-28 20:21:47,179 INFO L226 Difference]: Without dead ends: 24 [2023-11-28 20:21:47,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:21:47,181 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:47,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:21:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-28 20:21:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-28 20:21:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2023-11-28 20:21:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-11-28 20:21:47,188 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 22 [2023-11-28 20:21:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:47,189 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-11-28 20:21:47,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2023-11-28 20:21:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-11-28 20:21:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-28 20:21:47,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:47,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:47,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:21:47,191 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:47,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:47,191 INFO L85 PathProgramCache]: Analyzing trace with hash 292225116, now seen corresponding path program 1 times [2023-11-28 20:21:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:47,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859832321] [2023-11-28 20:21:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:21:47,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:47,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859832321] [2023-11-28 20:21:47,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859832321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:21:47,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:21:47,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:21:47,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251054384] [2023-11-28 20:21:47,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:21:47,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:21:47,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:47,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:21:47,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:21:47,293 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:47,365 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2023-11-28 20:21:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:21:47,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-28 20:21:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:47,366 INFO L225 Difference]: With dead ends: 50 [2023-11-28 20:21:47,367 INFO L226 Difference]: Without dead ends: 32 [2023-11-28 20:21:47,367 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 [2023-11-28 20:21:47,369 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:47,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:21:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-28 20:21:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-28 20:21:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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) [2023-11-28 20:21:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-11-28 20:21:47,377 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 23 [2023-11-28 20:21:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:47,378 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-11-28 20:21:47,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-11-28 20:21:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-28 20:21:47,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:47,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:47,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:21:47,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:47,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash -571287103, now seen corresponding path program 1 times [2023-11-28 20:21:47,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:47,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244764298] [2023-11-28 20:21:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:47,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-28 20:21:47,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:47,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244764298] [2023-11-28 20:21:47,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244764298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:47,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276799756] [2023-11-28 20:21:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:47,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:47,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:47,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:47,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:21:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:47,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:21:47,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-28 20:21:47,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-28 20:21:47,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276799756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:47,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:47,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-28 20:21:47,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848025166] [2023-11-28 20:21:47,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:47,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:21:47,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:47,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:21:47,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:47,675 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:47,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:47,727 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2023-11-28 20:21:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:21:47,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-28 20:21:47,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:47,729 INFO L225 Difference]: With dead ends: 61 [2023-11-28 20:21:47,729 INFO L226 Difference]: Without dead ends: 33 [2023-11-28 20:21:47,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:21:47,730 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:47,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:21:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-28 20:21:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-28 20:21:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-11-28 20:21:47,738 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 31 [2023-11-28 20:21:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:47,738 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-11-28 20:21:47,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-11-28 20:21:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-28 20:21:47,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:47,740 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:47,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:47,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:47,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:47,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1411852856, now seen corresponding path program 2 times [2023-11-28 20:21:47,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:47,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146439116] [2023-11-28 20:21:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:47,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 20:21:48,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:48,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146439116] [2023-11-28 20:21:48,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146439116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:48,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370998337] [2023-11-28 20:21:48,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:21:48,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:48,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:48,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:48,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:21:48,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:21:48,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:48,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:21:48,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 20:21:48,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 20:21:48,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370998337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:48,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:48,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-28 20:21:48,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971017983] [2023-11-28 20:21:48,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:48,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:21:48,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:48,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:21:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:21:48,245 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:48,335 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2023-11-28 20:21:48,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:21:48,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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 32 [2023-11-28 20:21:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:48,336 INFO L225 Difference]: With dead ends: 66 [2023-11-28 20:21:48,336 INFO L226 Difference]: Without dead ends: 41 [2023-11-28 20:21:48,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:21:48,338 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:48,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:21:48,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-28 20:21:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-28 20:21:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-28 20:21:48,346 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 32 [2023-11-28 20:21:48,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:48,346 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-28 20:21:48,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:48,346 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-28 20:21:48,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-28 20:21:48,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:48,348 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:48,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:21:48,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:48,553 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:48,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash -983377741, now seen corresponding path program 3 times [2023-11-28 20:21:48,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:48,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2498972] [2023-11-28 20:21:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:48,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:51,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:51,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2498972] [2023-11-28 20:21:51,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2498972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:51,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719277120] [2023-11-28 20:21:51,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:21:51,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:51,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:51,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:21:51,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:21:51,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:51,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-28 20:21:51,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:51,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:21:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:51,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:21:52,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719277120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:52,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:52,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 18 [2023-11-28 20:21:52,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351913858] [2023-11-28 20:21:52,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:52,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 20:21:52,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 20:21:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-28 20:21:52,016 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 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) [2023-11-28 20:21:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:52,396 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2023-11-28 20:21:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:21:52,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 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 40 [2023-11-28 20:21:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:52,398 INFO L225 Difference]: With dead ends: 74 [2023-11-28 20:21:52,398 INFO L226 Difference]: Without dead ends: 70 [2023-11-28 20:21:52,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:21:52,400 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:52,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 135 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:21:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-28 20:21:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-11-28 20:21:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 67 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-11-28 20:21:52,414 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 40 [2023-11-28 20:21:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:52,415 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-11-28 20:21:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 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) [2023-11-28 20:21:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-11-28 20:21:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-28 20:21:52,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:52,417 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:52,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-28 20:21:52,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-28 20:21:52,623 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:52,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:52,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1490045062, now seen corresponding path program 4 times [2023-11-28 20:21:52,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:52,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725069277] [2023-11-28 20:21:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:52,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-28 20:21:52,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:52,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725069277] [2023-11-28 20:21:52,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725069277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:52,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33815068] [2023-11-28 20:21:52,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:21:52,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:52,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:52,740 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:52,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:21:52,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:21:52,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:52,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:21:52,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-28 20:21:52,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-28 20:21:53,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33815068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:53,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:53,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-28 20:21:53,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201340635] [2023-11-28 20:21:53,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:53,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:21:53,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:21:53,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:21:53,014 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:53,589 INFO L93 Difference]: Finished difference Result 143 states and 180 transitions. [2023-11-28 20:21:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:21:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) Word has length 41 [2023-11-28 20:21:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:53,591 INFO L225 Difference]: With dead ends: 143 [2023-11-28 20:21:53,591 INFO L226 Difference]: Without dead ends: 78 [2023-11-28 20:21:53,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:21:53,593 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 90 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:53,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 85 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:21:53,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-28 20:21:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2023-11-28 20:21:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2023-11-28 20:21:53,608 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 41 [2023-11-28 20:21:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:53,608 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2023-11-28 20:21:53,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2023-11-28 20:21:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-28 20:21:53,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:53,610 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:53,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:21:53,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-28 20:21:53,815 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:53,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:53,815 INFO L85 PathProgramCache]: Analyzing trace with hash -603402222, now seen corresponding path program 5 times [2023-11-28 20:21:53,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:53,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291998352] [2023-11-28 20:21:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:53,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-28 20:21:53,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:53,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291998352] [2023-11-28 20:21:53,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291998352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:53,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038218465] [2023-11-28 20:21:53,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:21:53,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:53,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:53,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:53,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:21:54,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-28 20:21:54,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:54,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:21:54,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-28 20:21:54,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-28 20:21:54,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038218465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:54,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:54,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-28 20:21:54,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317162933] [2023-11-28 20:21:54,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:54,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 20:21:54,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:54,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 20:21:54,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:21:54,257 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:21:54,468 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2023-11-28 20:21:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:21:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-28 20:21:54,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:21:54,469 INFO L225 Difference]: With dead ends: 106 [2023-11-28 20:21:54,469 INFO L226 Difference]: Without dead ends: 50 [2023-11-28 20:21:54,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:21:54,471 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:21:54,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:21:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-28 20:21:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-28 20:21:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 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) [2023-11-28 20:21:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-11-28 20:21:54,480 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 42 [2023-11-28 20:21:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:21:54,481 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-11-28 20:21:54,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:21:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-11-28 20:21:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-28 20:21:54,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:21:54,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:21:54,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:21:54,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-28 20:21:54,683 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:21:54,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:21:54,684 INFO L85 PathProgramCache]: Analyzing trace with hash 394500289, now seen corresponding path program 6 times [2023-11-28 20:21:54,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:21:54,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317095160] [2023-11-28 20:21:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:21:54,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:21:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:21:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:21:58,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:21:58,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317095160] [2023-11-28 20:21:58,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317095160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:21:58,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102557655] [2023-11-28 20:21:58,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:21:58,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:21:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:21:58,675 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:21:58,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:21:58,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:21:58,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:21:58,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-28 20:21:58,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:21:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:21:59,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:21:59,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:21:59,676 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 52 treesize of output 89 [2023-11-28 20:21:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:21:59,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102557655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:21:59,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:21:59,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 12, 12] total 47 [2023-11-28 20:21:59,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35470182] [2023-11-28 20:21:59,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:21:59,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-28 20:21:59,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:21:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-28 20:21:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1972, Unknown=0, NotChecked=0, Total=2162 [2023-11-28 20:21:59,912 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 47 states, 47 states have (on average 2.723404255319149) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:02,860 INFO L93 Difference]: Finished difference Result 205 states and 246 transitions. [2023-11-28 20:22:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-28 20:22:02,860 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.723404255319149) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-28 20:22:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:02,862 INFO L225 Difference]: With dead ends: 205 [2023-11-28 20:22:02,863 INFO L226 Difference]: Without dead ends: 133 [2023-11-28 20:22:02,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=586, Invalid=5114, Unknown=0, NotChecked=0, Total=5700 [2023-11-28 20:22:02,866 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 160 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:02,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 232 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-28 20:22:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-28 20:22:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 106. [2023-11-28 20:22:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.2095238095238094) internal successors, (127), 105 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) [2023-11-28 20:22:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2023-11-28 20:22:02,889 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 49 [2023-11-28 20:22:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:02,890 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2023-11-28 20:22:02,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.723404255319149) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2023-11-28 20:22:02,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-28 20:22:02,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:02,892 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:02,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:22:03,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:03,094 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:03,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash -567554037, now seen corresponding path program 7 times [2023-11-28 20:22:03,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:03,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7336502] [2023-11-28 20:22:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:03,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-28 20:22:03,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:03,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7336502] [2023-11-28 20:22:03,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7336502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:03,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262102531] [2023-11-28 20:22:03,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:22:03,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:03,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:03,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:03,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:22:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:03,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:22:03,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-28 20:22:03,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-28 20:22:03,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262102531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:03,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:22:03,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-28 20:22:03,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727573437] [2023-11-28 20:22:03,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:03,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:22:03,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:03,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:22:03,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:22:03,510 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2023-11-28 20:22:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:03,700 INFO L93 Difference]: Finished difference Result 148 states and 182 transitions. [2023-11-28 20:22:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:22:03,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) Word has length 51 [2023-11-28 20:22:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:03,701 INFO L225 Difference]: With dead ends: 148 [2023-11-28 20:22:03,701 INFO L226 Difference]: Without dead ends: 59 [2023-11-28 20:22:03,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-28 20:22:03,703 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:03,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 71 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:22:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-28 20:22:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-28 20:22:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2023-11-28 20:22:03,711 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 51 [2023-11-28 20:22:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:03,711 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2023-11-28 20:22:03,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2023-11-28 20:22:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2023-11-28 20:22:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-28 20:22:03,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:03,713 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:03,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:22:03,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:03,918 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:03,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1905328461, now seen corresponding path program 8 times [2023-11-28 20:22:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:03,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701613573] [2023-11-28 20:22:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:22:09,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:09,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701613573] [2023-11-28 20:22:09,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701613573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:09,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390050938] [2023-11-28 20:22:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:22:09,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:09,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:09,674 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:09,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:22:09,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:22:09,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:22:09,775 WARN L260 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 148 conjunts are in the unsatisfiable core [2023-11-28 20:22:09,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:09,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:22:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:22:10,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 20:22:11,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390050938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:11,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:22:11,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 18, 13] total 59 [2023-11-28 20:22:11,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515176405] [2023-11-28 20:22:11,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:11,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-28 20:22:11,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-28 20:22:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3195, Unknown=0, NotChecked=0, Total=3422 [2023-11-28 20:22:11,229 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 59 states, 59 states have (on average 2.5762711864406778) internal successors, (152), 59 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:14,728 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2023-11-28 20:22:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-28 20:22:14,729 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.5762711864406778) internal successors, (152), 59 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-28 20:22:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:14,730 INFO L225 Difference]: With dead ends: 139 [2023-11-28 20:22:14,730 INFO L226 Difference]: Without dead ends: 135 [2023-11-28 20:22:14,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=531, Invalid=6609, Unknown=0, NotChecked=0, Total=7140 [2023-11-28 20:22:14,733 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 200 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 2721 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 2721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:14,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 184 Invalid, 3230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 2721 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-28 20:22:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-28 20:22:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 60. [2023-11-28 20:22:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 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) [2023-11-28 20:22:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-11-28 20:22:14,749 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 58 [2023-11-28 20:22:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:14,750 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-11-28 20:22:14,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.5762711864406778) internal successors, (152), 59 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-11-28 20:22:14,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-28 20:22:14,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:14,751 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:14,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:22:14,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:14,951 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:14,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:14,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1092747867, now seen corresponding path program 9 times [2023-11-28 20:22:14,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:14,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438798226] [2023-11-28 20:22:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:14,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-28 20:22:15,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:15,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438798226] [2023-11-28 20:22:15,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438798226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:15,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572673512] [2023-11-28 20:22:15,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:22:15,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:15,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:15,127 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:15,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:22:15,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-28 20:22:15,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:22:15,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:22:15,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-28 20:22:15,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-28 20:22:15,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572673512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:15,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:22:15,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-11-28 20:22:15,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462312593] [2023-11-28 20:22:15,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:15,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 20:22:15,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:15,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 20:22:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:22:15,451 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:15,787 INFO L93 Difference]: Finished difference Result 171 states and 201 transitions. [2023-11-28 20:22:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-28 20:22:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-28 20:22:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:15,789 INFO L225 Difference]: With dead ends: 171 [2023-11-28 20:22:15,789 INFO L226 Difference]: Without dead ends: 68 [2023-11-28 20:22:15,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 103 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2023-11-28 20:22:15,790 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:15,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 55 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:22:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-28 20:22:15,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-28 20:22:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 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) [2023-11-28 20:22:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-11-28 20:22:15,809 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 59 [2023-11-28 20:22:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:15,809 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-11-28 20:22:15,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-11-28 20:22:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-28 20:22:15,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:15,810 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:15,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:22:16,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:16,011 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:16,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:16,011 INFO L85 PathProgramCache]: Analyzing trace with hash 557647809, now seen corresponding path program 10 times [2023-11-28 20:22:16,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:16,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723858549] [2023-11-28 20:22:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:16,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 7 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:22:22,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:22,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723858549] [2023-11-28 20:22:22,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723858549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:22,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187234951] [2023-11-28 20:22:22,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:22:22,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:22,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:22,598 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:22,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:22:22,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:22:22,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:22:22,690 WARN L260 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 182 conjunts are in the unsatisfiable core [2023-11-28 20:22:22,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:22,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:22:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:22:23,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-28 20:22:24,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187234951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:24,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:22:24,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 21, 15] total 64 [2023-11-28 20:22:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296996439] [2023-11-28 20:22:24,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:24,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-28 20:22:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:24,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-28 20:22:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3797, Unknown=0, NotChecked=0, Total=4032 [2023-11-28 20:22:24,177 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 64 states, 64 states have (on average 2.65625) internal successors, (170), 64 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:28,496 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2023-11-28 20:22:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-28 20:22:28,497 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.65625) internal successors, (170), 64 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-28 20:22:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:28,498 INFO L225 Difference]: With dead ends: 152 [2023-11-28 20:22:28,498 INFO L226 Difference]: Without dead ends: 148 [2023-11-28 20:22:28,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=631, Invalid=7741, Unknown=0, NotChecked=0, Total=8372 [2023-11-28 20:22:28,501 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 201 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 3005 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 3005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:28,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 212 Invalid, 3566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 3005 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-28 20:22:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-28 20:22:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 69. [2023-11-28 20:22:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 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) [2023-11-28 20:22:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2023-11-28 20:22:28,526 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 67 [2023-11-28 20:22:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:28,526 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2023-11-28 20:22:28,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.65625) internal successors, (170), 64 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2023-11-28 20:22:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-28 20:22:28,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:28,527 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:28,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:22:28,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:28,728 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:28,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:28,728 INFO L85 PathProgramCache]: Analyzing trace with hash 135600909, now seen corresponding path program 11 times [2023-11-28 20:22:28,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:28,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781443950] [2023-11-28 20:22:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:28,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-28 20:22:28,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781443950] [2023-11-28 20:22:28,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781443950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715894783] [2023-11-28 20:22:28,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:22:28,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:28,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:28,954 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:28,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:22:29,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-28 20:22:29,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:22:29,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:22:29,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-28 20:22:29,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-28 20:22:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715894783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:29,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:22:29,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2023-11-28 20:22:29,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159633347] [2023-11-28 20:22:29,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:29,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-28 20:22:29,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:29,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-28 20:22:29,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:22:29,466 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 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) [2023-11-28 20:22:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:22:29,987 INFO L93 Difference]: Finished difference Result 195 states and 225 transitions. [2023-11-28 20:22:29,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 20:22:29,987 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 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 68 [2023-11-28 20:22:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:22:29,988 INFO L225 Difference]: With dead ends: 195 [2023-11-28 20:22:29,988 INFO L226 Difference]: Without dead ends: 77 [2023-11-28 20:22:29,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 118 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:22:29,990 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:22:29,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 86 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:22:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-28 20:22:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-28 20:22:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2023-11-28 20:22:30,024 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 68 [2023-11-28 20:22:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:22:30,024 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2023-11-28 20:22:30,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 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) [2023-11-28 20:22:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2023-11-28 20:22:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-28 20:22:30,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:22:30,025 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:22:30,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:22:30,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:22:30,226 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:22:30,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:22:30,226 INFO L85 PathProgramCache]: Analyzing trace with hash -815565645, now seen corresponding path program 12 times [2023-11-28 20:22:30,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:22:30,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301263510] [2023-11-28 20:22:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:22:30,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:22:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:22:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:22:40,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:22:40,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301263510] [2023-11-28 20:22:40,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301263510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:22:40,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024560683] [2023-11-28 20:22:40,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:22:40,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:22:40,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:22:40,068 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:22:40,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:22:40,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-28 20:22:40,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:22:40,196 WARN L260 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 223 conjunts are in the unsatisfiable core [2023-11-28 20:22:40,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:22:42,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:22:42,470 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 19 treesize of output 16 [2023-11-28 20:22:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 186 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:22:42,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:22:45,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:22:45,087 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 86 treesize of output 235 [2023-11-28 20:22:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-28 20:22:47,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024560683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:22:47,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:22:47,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 26, 21] total 92 [2023-11-28 20:22:47,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587436172] [2023-11-28 20:22:47,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:22:47,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-11-28 20:22:47,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:22:47,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-11-28 20:22:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=8005, Unknown=0, NotChecked=0, Total=8372 [2023-11-28 20:22:47,192 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:22:55,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:22:57,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:23:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:01,243 INFO L93 Difference]: Finished difference Result 224 states and 259 transitions. [2023-11-28 20:23:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-28 20:23:01,244 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 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 76 [2023-11-28 20:23:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:01,245 INFO L225 Difference]: With dead ends: 224 [2023-11-28 20:23:01,246 INFO L226 Difference]: Without dead ends: 220 [2023-11-28 20:23:01,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4714 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1232, Invalid=19360, Unknown=0, NotChecked=0, Total=20592 [2023-11-28 20:23:01,253 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 258 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 5943 mSolverCounterSat, 806 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 6752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 5943 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:01,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 366 Invalid, 6752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 5943 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2023-11-28 20:23:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-28 20:23:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 139. [2023-11-28 20:23:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.144927536231884) internal successors, (158), 138 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2023-11-28 20:23:01,341 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 76 [2023-11-28 20:23:01,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:01,342 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2023-11-28 20:23:01,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2023-11-28 20:23:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-28 20:23:01,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:01,343 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:23:01,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 20:23:01,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:01,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:01,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:01,544 INFO L85 PathProgramCache]: Analyzing trace with hash 515656795, now seen corresponding path program 13 times [2023-11-28 20:23:01,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:01,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649157689] [2023-11-28 20:23:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:01,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-28 20:23:01,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:01,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649157689] [2023-11-28 20:23:01,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649157689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:01,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669425259] [2023-11-28 20:23:01,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:23:01,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:23:01,787 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:23:01,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:23:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:01,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:23:01,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:23:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-28 20:23:02,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:23:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-28 20:23:02,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669425259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:23:02,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:23:02,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-28 20:23:02,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032218503] [2023-11-28 20:23:02,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:23:02,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:23:02,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:02,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:23:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:23:02,239 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:02,611 INFO L93 Difference]: Finished difference Result 327 states and 372 transitions. [2023-11-28 20:23:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:23:02,612 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 77 [2023-11-28 20:23:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:02,613 INFO L225 Difference]: With dead ends: 327 [2023-11-28 20:23:02,613 INFO L226 Difference]: Without dead ends: 140 [2023-11-28 20:23:02,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 132 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2023-11-28 20:23:02,614 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:02,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 49 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:23:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-28 20:23:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-11-28 20:23:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.143884892086331) internal successors, (159), 139 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 159 transitions. [2023-11-28 20:23:02,695 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 159 transitions. Word has length 77 [2023-11-28 20:23:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:02,695 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 159 transitions. [2023-11-28 20:23:02,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 159 transitions. [2023-11-28 20:23:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-28 20:23:02,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:02,696 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:23:02,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:23:02,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:02,897 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:02,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:02,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1582537582, now seen corresponding path program 14 times [2023-11-28 20:23:02,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:02,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073737301] [2023-11-28 20:23:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:02,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-11-28 20:23:03,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:03,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073737301] [2023-11-28 20:23:03,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073737301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:03,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355370461] [2023-11-28 20:23:03,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:23:03,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:03,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:23:03,143 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:23:03,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:23:03,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:23:03,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:23:03,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:23:03,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:23:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-11-28 20:23:03,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:23:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-11-28 20:23:03,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355370461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:23:03,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:23:03,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-28 20:23:03,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644657494] [2023-11-28 20:23:03,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:23:03,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:23:03,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:03,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:23:03,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:23:03,537 INFO L87 Difference]: Start difference. First operand 140 states and 159 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:03,829 INFO L93 Difference]: Finished difference Result 208 states and 241 transitions. [2023-11-28 20:23:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:23:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 78 [2023-11-28 20:23:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:03,830 INFO L225 Difference]: With dead ends: 208 [2023-11-28 20:23:03,830 INFO L226 Difference]: Without dead ends: 86 [2023-11-28 20:23:03,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 133 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2023-11-28 20:23:03,831 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:03,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 77 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:23:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-28 20:23:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-28 20:23:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 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) [2023-11-28 20:23:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-11-28 20:23:03,880 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 78 [2023-11-28 20:23:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:03,880 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-11-28 20:23:03,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-11-28 20:23:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-28 20:23:03,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:03,881 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:23:03,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 20:23:04,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:23:04,082 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:04,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:04,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1201088193, now seen corresponding path program 15 times [2023-11-28 20:23:04,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:04,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691069885] [2023-11-28 20:23:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:04,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 25 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:23:15,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:15,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691069885] [2023-11-28 20:23:15,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691069885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:15,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510371993] [2023-11-28 20:23:15,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:23:15,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:15,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:23:15,585 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:23:15,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:23:15,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-28 20:23:15,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:23:15,773 WARN L260 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 253 conjunts are in the unsatisfiable core [2023-11-28 20:23:15,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:23:15,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-28 20:23:23,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:23:23,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:23:23,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:23:23,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:23:23,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2023-11-28 20:23:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 7 proven. 224 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-28 20:23:24,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:23:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 20:23:30,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510371993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:23:30,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:23:30,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 46, 47] total 139 [2023-11-28 20:23:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575359939] [2023-11-28 20:23:30,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:23:30,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2023-11-28 20:23:30,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2023-11-28 20:23:30,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=17880, Unknown=3, NotChecked=0, Total=19182 [2023-11-28 20:23:30,732 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 139 states, 139 states have (on average 1.7338129496402879) internal successors, (241), 139 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:47,196 INFO L93 Difference]: Finished difference Result 369 states and 418 transitions. [2023-11-28 20:23:47,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-28 20:23:47,196 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.7338129496402879) internal successors, (241), 139 states have internal predecessors, (241), 0 states have call successors, (0), 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 85 [2023-11-28 20:23:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:47,198 INFO L225 Difference]: With dead ends: 369 [2023-11-28 20:23:47,198 INFO L226 Difference]: Without dead ends: 265 [2023-11-28 20:23:47,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11986 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=3048, Invalid=37149, Unknown=3, NotChecked=0, Total=40200 [2023-11-28 20:23:47,203 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 213 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 7401 mSolverCounterSat, 1049 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 8450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1049 IncrementalHoareTripleChecker+Valid, 7401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:47,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 509 Invalid, 8450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1049 Valid, 7401 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-11-28 20:23:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-11-28 20:23:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 195. [2023-11-28 20:23:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1134020618556701) internal successors, (216), 194 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 216 transitions. [2023-11-28 20:23:47,340 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 216 transitions. Word has length 85 [2023-11-28 20:23:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:47,340 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 216 transitions. [2023-11-28 20:23:47,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.7338129496402879) internal successors, (241), 139 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 216 transitions. [2023-11-28 20:23:47,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-28 20:23:47,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:47,341 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:23:47,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-28 20:23:47,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:23:47,542 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:47,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:47,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1604062849, now seen corresponding path program 16 times [2023-11-28 20:23:47,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298847010] [2023-11-28 20:23:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:47,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:23:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-11-28 20:23:47,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:23:47,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298847010] [2023-11-28 20:23:47,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298847010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:23:47,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755693757] [2023-11-28 20:23:47,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:23:47,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:23:47,791 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:23:47,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:23:47,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:23:47,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:23:47,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:23:47,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:23:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-11-28 20:23:48,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:23:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-11-28 20:23:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755693757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:23:48,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:23:48,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2023-11-28 20:23:48,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8605356] [2023-11-28 20:23:48,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:23:48,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-28 20:23:48,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:23:48,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-28 20:23:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2023-11-28 20:23:48,367 INFO L87 Difference]: Start difference. First operand 195 states and 216 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:23:49,050 INFO L93 Difference]: Finished difference Result 260 states and 293 transitions. [2023-11-28 20:23:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-28 20:23:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-11-28 20:23:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:23:49,052 INFO L225 Difference]: With dead ends: 260 [2023-11-28 20:23:49,052 INFO L226 Difference]: Without dead ends: 115 [2023-11-28 20:23:49,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 143 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2023-11-28 20:23:49,054 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:23:49,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 47 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:23:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-28 20:23:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 95. [2023-11-28 20:23:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 94 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2023-11-28 20:23:49,132 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 88 [2023-11-28 20:23:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:23:49,133 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2023-11-28 20:23:49,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:23:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2023-11-28 20:23:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-28 20:23:49,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:23:49,134 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:23:49,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 20:23:49,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:23:49,335 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:23:49,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:23:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash -527942989, now seen corresponding path program 17 times [2023-11-28 20:23:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:23:49,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231241601] [2023-11-28 20:23:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:23:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:23:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 25 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:04,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231241601] [2023-11-28 20:24:04,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231241601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18031481] [2023-11-28 20:24:04,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:24:04,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:04,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:04,639 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:04,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:24:04,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-28 20:24:04,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:24:04,958 WARN L260 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 284 conjunts are in the unsatisfiable core [2023-11-28 20:24:04,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:05,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:24:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:05,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:24:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-28 20:24:07,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18031481] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:24:07,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:24:07,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 30, 21] total 90 [2023-11-28 20:24:07,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437305435] [2023-11-28 20:24:07,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:24:07,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-28 20:24:07,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-28 20:24:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=7557, Unknown=0, NotChecked=0, Total=8010 [2023-11-28 20:24:07,880 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 90 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 90 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:16,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:16,447 INFO L93 Difference]: Finished difference Result 260 states and 290 transitions. [2023-11-28 20:24:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-28 20:24:16,447 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 90 states have internal predecessors, (229), 0 states have call successors, (0), 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 94 [2023-11-28 20:24:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:16,450 INFO L225 Difference]: With dead ends: 260 [2023-11-28 20:24:16,450 INFO L226 Difference]: Without dead ends: 256 [2023-11-28 20:24:16,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5280 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1475, Invalid=18265, Unknown=0, NotChecked=0, Total=19740 [2023-11-28 20:24:16,452 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 4676 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 5260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 4676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:16,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 212 Invalid, 5260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 4676 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-28 20:24:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-28 20:24:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 169. [2023-11-28 20:24:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1071428571428572) internal successors, (186), 168 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2023-11-28 20:24:16,597 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 94 [2023-11-28 20:24:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:16,597 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2023-11-28 20:24:16,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 90 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2023-11-28 20:24:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-28 20:24:16,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:16,599 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:16,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-28 20:24:16,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:16,799 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:16,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:16,800 INFO L85 PathProgramCache]: Analyzing trace with hash 842024539, now seen corresponding path program 18 times [2023-11-28 20:24:16,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:16,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623117635] [2023-11-28 20:24:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:16,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-28 20:24:17,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:17,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623117635] [2023-11-28 20:24:17,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623117635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:17,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52778511] [2023-11-28 20:24:17,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:24:17,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:17,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:17,173 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:17,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 20:24:17,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-28 20:24:17,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:24:17,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:24:17,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-28 20:24:17,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:24:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-28 20:24:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52778511] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:24:17,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:24:17,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2023-11-28 20:24:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120568186] [2023-11-28 20:24:17,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:24:17,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-28 20:24:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:17,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-28 20:24:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2023-11-28 20:24:17,916 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 40 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:18,953 INFO L93 Difference]: Finished difference Result 376 states and 416 transitions. [2023-11-28 20:24:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-28 20:24:18,953 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 40 states have internal predecessors, (86), 0 states have call successors, (0), 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 95 [2023-11-28 20:24:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:18,954 INFO L225 Difference]: With dead ends: 376 [2023-11-28 20:24:18,954 INFO L226 Difference]: Without dead ends: 177 [2023-11-28 20:24:18,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 163 SyntacticMatches, 17 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2023-11-28 20:24:18,956 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:18,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 84 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 20:24:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-28 20:24:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 163. [2023-11-28 20:24:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0925925925925926) internal successors, (177), 162 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 177 transitions. [2023-11-28 20:24:19,095 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 177 transitions. Word has length 95 [2023-11-28 20:24:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:19,095 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 177 transitions. [2023-11-28 20:24:19,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 40 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 177 transitions. [2023-11-28 20:24:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-28 20:24:19,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:19,096 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:19,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 20:24:19,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-28 20:24:19,297 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:19,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash 733593149, now seen corresponding path program 19 times [2023-11-28 20:24:19,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:19,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724027508] [2023-11-28 20:24:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:19,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-11-28 20:24:19,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:19,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724027508] [2023-11-28 20:24:19,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724027508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:19,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132242258] [2023-11-28 20:24:19,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:24:19,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:19,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:19,656 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:19,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 20:24:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:19,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:24:19,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-11-28 20:24:19,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:24:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-11-28 20:24:20,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132242258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:24:20,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:24:20,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-28 20:24:20,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290935262] [2023-11-28 20:24:20,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:24:20,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-28 20:24:20,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:20,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-28 20:24:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2023-11-28 20:24:20,188 INFO L87 Difference]: Start difference. First operand 163 states and 177 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:20,584 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2023-11-28 20:24:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-28 20:24:20,584 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 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 96 [2023-11-28 20:24:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:20,585 INFO L225 Difference]: With dead ends: 168 [2023-11-28 20:24:20,585 INFO L226 Difference]: Without dead ends: 104 [2023-11-28 20:24:20,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 163 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 20:24:20,587 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:20,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 77 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:24:20,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-28 20:24:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-28 20:24:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.087378640776699) internal successors, (112), 103 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2023-11-28 20:24:20,682 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 96 [2023-11-28 20:24:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:20,683 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2023-11-28 20:24:20,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2023-11-28 20:24:20,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-28 20:24:20,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:20,684 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:20,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-28 20:24:20,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-28 20:24:20,885 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:20,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:20,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1777732159, now seen corresponding path program 20 times [2023-11-28 20:24:20,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:20,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168700184] [2023-11-28 20:24:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:20,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 48 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:41,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168700184] [2023-11-28 20:24:41,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168700184] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29386188] [2023-11-28 20:24:41,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:24:41,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:41,192 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:41,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 20:24:41,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:24:41,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:24:41,333 WARN L260 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 318 conjunts are in the unsatisfiable core [2023-11-28 20:24:41,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:41,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:24:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:42,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:24:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-28 20:24:45,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29386188] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:24:45,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:24:45,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 33, 23] total 105 [2023-11-28 20:24:45,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740639812] [2023-11-28 20:24:45,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:24:45,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-28 20:24:45,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:45,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-28 20:24:45,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=10404, Unknown=0, NotChecked=0, Total=10920 [2023-11-28 20:24:45,346 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 105 states, 105 states have (on average 2.4761904761904763) internal successors, (260), 105 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:56,387 INFO L93 Difference]: Finished difference Result 293 states and 330 transitions. [2023-11-28 20:24:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-28 20:24:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.4761904761904763) internal successors, (260), 105 states have internal predecessors, (260), 0 states have call successors, (0), 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 103 [2023-11-28 20:24:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:56,389 INFO L225 Difference]: With dead ends: 293 [2023-11-28 20:24:56,389 INFO L226 Difference]: Without dead ends: 289 [2023-11-28 20:24:56,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7774 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1826, Invalid=25564, Unknown=0, NotChecked=0, Total=27390 [2023-11-28 20:24:56,391 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 265 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 6124 mSolverCounterSat, 1163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 7287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1163 IncrementalHoareTripleChecker+Valid, 6124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:56,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 257 Invalid, 7287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1163 Valid, 6124 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-28 20:24:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-28 20:24:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 165. [2023-11-28 20:24:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1097560975609757) internal successors, (182), 164 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 182 transitions. [2023-11-28 20:24:56,529 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 182 transitions. Word has length 103 [2023-11-28 20:24:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:56,530 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 182 transitions. [2023-11-28 20:24:56,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.4761904761904763) internal successors, (260), 105 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 182 transitions. [2023-11-28 20:24:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-28 20:24:56,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:56,531 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:56,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 20:24:56,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-28 20:24:56,731 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:56,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash 753265933, now seen corresponding path program 21 times [2023-11-28 20:24:56,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:56,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613110515] [2023-11-28 20:24:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:56,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-28 20:24:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613110515] [2023-11-28 20:24:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613110515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191157011] [2023-11-28 20:24:57,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:24:57,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:57,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:57,098 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:57,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 20:24:57,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-28 20:24:57,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:24:57,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 20:24:57,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-28 20:24:57,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:24:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-28 20:24:57,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191157011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:24:57,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:24:57,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2023-11-28 20:24:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306250513] [2023-11-28 20:24:57,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:24:57,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-28 20:24:57,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:57,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-28 20:24:57,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1549, Unknown=0, NotChecked=0, Total=1892 [2023-11-28 20:24:57,987 INFO L87 Difference]: Start difference. First operand 165 states and 182 transitions. Second operand has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 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) [2023-11-28 20:24:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:58,913 INFO L93 Difference]: Finished difference Result 375 states and 416 transitions. [2023-11-28 20:24:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-28 20:24:58,913 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 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 104 [2023-11-28 20:24:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:58,914 INFO L225 Difference]: With dead ends: 375 [2023-11-28 20:24:58,914 INFO L226 Difference]: Without dead ends: 117 [2023-11-28 20:24:58,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 168 SyntacticMatches, 19 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=542, Invalid=2428, Unknown=0, NotChecked=0, Total=2970 [2023-11-28 20:24:58,915 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:58,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 58 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:24:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-28 20:24:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2023-11-28 20:24:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.0810810810810811) internal successors, (120), 111 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2023-11-28 20:24:59,025 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 104 [2023-11-28 20:24:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:59,025 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2023-11-28 20:24:59,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 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) [2023-11-28 20:24:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2023-11-28 20:24:59,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-28 20:24:59,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:59,027 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:59,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-28 20:24:59,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-28 20:24:59,227 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:24:59,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1780254043, now seen corresponding path program 22 times [2023-11-28 20:24:59,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:59,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250346992] [2023-11-28 20:24:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:59,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-11-28 20:24:59,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:59,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250346992] [2023-11-28 20:24:59,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250346992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:59,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902147766] [2023-11-28 20:24:59,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:24:59,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:59,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:59,633 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:59,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-28 20:24:59,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:24:59,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:24:59,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 20:24:59,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-11-28 20:25:00,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:25:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-11-28 20:25:00,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902147766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:25:00,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:25:00,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2023-11-28 20:25:00,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006502274] [2023-11-28 20:25:00,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:25:00,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-28 20:25:00,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:00,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-28 20:25:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1549, Unknown=0, NotChecked=0, Total=1892 [2023-11-28 20:25:00,420 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 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) [2023-11-28 20:25:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:01,109 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2023-11-28 20:25:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-28 20:25:01,110 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 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 111 [2023-11-28 20:25:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:01,111 INFO L225 Difference]: With dead ends: 117 [2023-11-28 20:25:01,111 INFO L226 Difference]: Without dead ends: 113 [2023-11-28 20:25:01,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 181 SyntacticMatches, 20 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=2430, Unknown=0, NotChecked=0, Total=2970 [2023-11-28 20:25:01,112 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:01,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 57 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:25:01,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-28 20:25:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-28 20:25:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0803571428571428) internal successors, (121), 112 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:25:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2023-11-28 20:25:01,218 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 111 [2023-11-28 20:25:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:01,218 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2023-11-28 20:25:01,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 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) [2023-11-28 20:25:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2023-11-28 20:25:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-28 20:25:01,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:01,219 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:01,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-28 20:25:01,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-28 20:25:01,419 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:01,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash -618311501, now seen corresponding path program 23 times [2023-11-28 20:25:01,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:01,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279265690] [2023-11-28 20:25:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:01,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 49 proven. 446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:25:25,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:25,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279265690] [2023-11-28 20:25:25,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279265690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:25:25,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81428006] [2023-11-28 20:25:25,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:25:25,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:25,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:25,778 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:25,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-28 20:25:26,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-28 20:25:26,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:25:26,536 WARN L260 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 366 conjunts are in the unsatisfiable core [2023-11-28 20:25:26,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:26,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:25:26,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:25:26,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:25:26,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:25:26,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:25:26,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:25:26,614 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 15 treesize of output 1 [2023-11-28 20:25:26,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:25:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:25:27,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:25:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 440 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:25:32,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81428006] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:25:32,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:25:32,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 36, 25] total 114 [2023-11-28 20:25:32,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534050802] [2023-11-28 20:25:32,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:25:32,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2023-11-28 20:25:32,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:32,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2023-11-28 20:25:32,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=12305, Unknown=0, NotChecked=0, Total=12882 [2023-11-28 20:25:32,066 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 114 states, 114 states have (on average 2.4473684210526314) internal successors, (279), 114 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:25:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:47,719 INFO L93 Difference]: Finished difference Result 432 states and 476 transitions. [2023-11-28 20:25:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-11-28 20:25:47,719 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.4473684210526314) internal successors, (279), 114 states have internal predecessors, (279), 0 states have call successors, (0), 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 112 [2023-11-28 20:25:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:47,721 INFO L225 Difference]: With dead ends: 432 [2023-11-28 20:25:47,721 INFO L226 Difference]: Without dead ends: 304 [2023-11-28 20:25:47,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8304 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=2230, Invalid=30350, Unknown=0, NotChecked=0, Total=32580 [2023-11-28 20:25:47,723 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 240 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 9589 mSolverCounterSat, 1314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 10903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1314 IncrementalHoareTripleChecker+Valid, 9589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:47,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 455 Invalid, 10903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1314 Valid, 9589 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2023-11-28 20:25:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-28 20:25:47,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 239. [2023-11-28 20:25:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0924369747899159) internal successors, (260), 238 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:25:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 260 transitions. [2023-11-28 20:25:47,950 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 260 transitions. Word has length 112 [2023-11-28 20:25:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:47,950 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 260 transitions. [2023-11-28 20:25:47,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.4473684210526314) internal successors, (279), 114 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:25:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 260 transitions. [2023-11-28 20:25:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-28 20:25:47,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:47,951 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:47,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-28 20:25:48,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-28 20:25:48,152 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:48,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash -511592387, now seen corresponding path program 24 times [2023-11-28 20:25:48,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:48,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59494363] [2023-11-28 20:25:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:48,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:25:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-28 20:25:48,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:25:48,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59494363] [2023-11-28 20:25:48,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59494363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:25:48,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148988905] [2023-11-28 20:25:48,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:25:48,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:25:48,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:25:48,576 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:25:48,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-28 20:25:48,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-28 20:25:48,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:25:48,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 20:25:48,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:25:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-28 20:25:49,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:25:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-28 20:25:49,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148988905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:25:49,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:25:49,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-28 20:25:49,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227229142] [2023-11-28 20:25:49,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:25:49,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-28 20:25:49,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:25:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-28 20:25:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1067, Unknown=0, NotChecked=0, Total=1406 [2023-11-28 20:25:49,452 INFO L87 Difference]: Start difference. First operand 239 states and 260 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:25:49,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:25:49,842 INFO L93 Difference]: Finished difference Result 322 states and 355 transitions. [2023-11-28 20:25:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-28 20:25:49,843 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-11-28 20:25:49,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:25:49,844 INFO L225 Difference]: With dead ends: 322 [2023-11-28 20:25:49,844 INFO L226 Difference]: Without dead ends: 122 [2023-11-28 20:25:49,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 193 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=1129, Unknown=0, NotChecked=0, Total=1482 [2023-11-28 20:25:49,845 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:25:49,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 41 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:25:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-28 20:25:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-11-28 20:25:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0743801652892562) internal successors, (130), 121 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:25:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2023-11-28 20:25:49,979 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 114 [2023-11-28 20:25:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:25:49,979 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2023-11-28 20:25:49,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:25:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2023-11-28 20:25:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-28 20:25:49,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:25:49,980 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:25:49,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-28 20:25:50,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-28 20:25:50,181 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:25:50,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:25:50,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1460499649, now seen corresponding path program 25 times [2023-11-28 20:25:50,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:25:50,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602782393] [2023-11-28 20:25:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:25:50,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:25:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 75 proven. 519 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:26:20,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:26:20,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602782393] [2023-11-28 20:26:20,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602782393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:26:20,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311860350] [2023-11-28 20:26:20,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:26:20,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:26:20,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:26:20,118 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:26:20,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-28 20:26:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:20,305 WARN L260 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 386 conjunts are in the unsatisfiable core [2023-11-28 20:26:20,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:26:20,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:26:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:26:21,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:26:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-28 20:26:27,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311860350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:26:27,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:26:27,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 39, 27] total 126 [2023-11-28 20:26:27,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538812260] [2023-11-28 20:26:27,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:26:27,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2023-11-28 20:26:27,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:26:27,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2023-11-28 20:26:27,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=15093, Unknown=0, NotChecked=0, Total=15750 [2023-11-28 20:26:27,084 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 126 states, 126 states have (on average 2.4047619047619047) internal successors, (303), 126 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:26:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:26:47,977 INFO L93 Difference]: Finished difference Result 337 states and 374 transitions. [2023-11-28 20:26:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-28 20:26:47,978 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.4047619047619047) internal successors, (303), 126 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-11-28 20:26:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:26:47,980 INFO L225 Difference]: With dead ends: 337 [2023-11-28 20:26:47,980 INFO L226 Difference]: Without dead ends: 333 [2023-11-28 20:26:47,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9929 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=2473, Invalid=36533, Unknown=0, NotChecked=0, Total=39006 [2023-11-28 20:26:47,983 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 344 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 9721 mSolverCounterSat, 1649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 11370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1649 IncrementalHoareTripleChecker+Valid, 9721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:26:47,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 326 Invalid, 11370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1649 Valid, 9721 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2023-11-28 20:26:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-28 20:26:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 193. [2023-11-28 20:26:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.09375) internal successors, (210), 192 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:26:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 210 transitions. [2023-11-28 20:26:48,256 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 210 transitions. Word has length 121 [2023-11-28 20:26:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:26:48,257 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 210 transitions. [2023-11-28 20:26:48,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.4047619047619047) internal successors, (303), 126 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:26:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 210 transitions. [2023-11-28 20:26:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-28 20:26:48,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:26:48,257 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:26:48,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-28 20:26:48,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-28 20:26:48,458 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:26:48,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:26:48,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1940763123, now seen corresponding path program 26 times [2023-11-28 20:26:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:26:48,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137130837] [2023-11-28 20:26:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:26:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2023-11-28 20:26:49,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:26:49,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137130837] [2023-11-28 20:26:49,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137130837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:26:49,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177516327] [2023-11-28 20:26:49,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:26:49,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:26:49,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:26:49,029 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:26:49,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-28 20:26:49,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:26:49,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:26:49,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-28 20:26:49,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:26:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2023-11-28 20:26:49,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:26:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2023-11-28 20:26:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177516327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:26:49,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:26:49,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-11-28 20:26:49,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607351052] [2023-11-28 20:26:49,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:26:49,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-28 20:26:49,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:26:49,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-28 20:26:49,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2023-11-28 20:26:49,906 INFO L87 Difference]: Start difference. First operand 193 states and 210 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 41 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) [2023-11-28 20:26:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:26:50,785 INFO L93 Difference]: Finished difference Result 465 states and 506 transitions. [2023-11-28 20:26:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-28 20:26:50,785 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 41 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 122 [2023-11-28 20:26:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:26:50,787 INFO L225 Difference]: With dead ends: 465 [2023-11-28 20:26:50,787 INFO L226 Difference]: Without dead ends: 194 [2023-11-28 20:26:50,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 207 SyntacticMatches, 23 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=1336, Unknown=0, NotChecked=0, Total=1722 [2023-11-28 20:26:50,789 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:26:50,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 55 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:26:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-28 20:26:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2023-11-28 20:26:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0932642487046633) internal successors, (211), 193 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:26:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 211 transitions. [2023-11-28 20:26:51,035 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 211 transitions. Word has length 122 [2023-11-28 20:26:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:26:51,035 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 211 transitions. [2023-11-28 20:26:51,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 41 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) [2023-11-28 20:26:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 211 transitions. [2023-11-28 20:26:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-28 20:26:51,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:26:51,036 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:26:51,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-28 20:26:51,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-28 20:26:51,237 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:26:51,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:26:51,237 INFO L85 PathProgramCache]: Analyzing trace with hash 492348214, now seen corresponding path program 27 times [2023-11-28 20:26:51,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:26:51,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898781426] [2023-11-28 20:26:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:51,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:26:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:26:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2023-11-28 20:26:51,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:26:51,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898781426] [2023-11-28 20:26:51,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898781426] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:26:51,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801527193] [2023-11-28 20:26:51,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:26:51,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:26:51,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:26:51,741 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:26:51,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-28 20:26:52,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-28 20:26:52,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:26:52,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-28 20:26:52,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:26:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2023-11-28 20:26:52,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:26:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2023-11-28 20:26:53,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801527193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:26:53,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:26:53,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2023-11-28 20:26:53,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126390702] [2023-11-28 20:26:53,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:26:53,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-28 20:26:53,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:26:53,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-28 20:26:53,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=3485, Unknown=0, NotChecked=0, Total=4032 [2023-11-28 20:26:53,278 INFO L87 Difference]: Start difference. First operand 194 states and 211 transitions. Second operand has 64 states, 64 states have (on average 1.75) internal successors, (112), 64 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:26:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:26:54,264 INFO L93 Difference]: Finished difference Result 297 states and 328 transitions. [2023-11-28 20:26:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-28 20:26:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.75) internal successors, (112), 64 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-11-28 20:26:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:26:54,266 INFO L225 Difference]: With dead ends: 297 [2023-11-28 20:26:54,266 INFO L226 Difference]: Without dead ends: 131 [2023-11-28 20:26:54,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 208 SyntacticMatches, 13 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=807, Invalid=5045, Unknown=0, NotChecked=0, Total=5852 [2023-11-28 20:26:54,267 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:26:54,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 94 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:26:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-28 20:26:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-28 20:26:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0692307692307692) internal successors, (139), 130 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:26:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 139 transitions. [2023-11-28 20:26:54,470 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 139 transitions. Word has length 123 [2023-11-28 20:26:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:26:54,470 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 139 transitions. [2023-11-28 20:26:54,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.75) internal successors, (112), 64 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:26:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 139 transitions. [2023-11-28 20:26:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-28 20:26:54,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:26:54,471 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:26:54,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-28 20:26:54,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:26:54,672 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:26:54,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:26:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash 427996851, now seen corresponding path program 28 times [2023-11-28 20:26:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:26:54,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851183935] [2023-11-28 20:26:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:26:54,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:26:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:27:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 90 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:31,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:27:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851183935] [2023-11-28 20:27:31,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851183935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:27:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766585705] [2023-11-28 20:27:31,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:27:31,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:27:31,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:27:31,518 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:27:31,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-28 20:27:31,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:27:31,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:27:31,752 WARN L260 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 422 conjunts are in the unsatisfiable core [2023-11-28 20:27:31,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:27:31,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:27:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:27:33,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:27:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 624 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-28 20:27:39,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766585705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:27:39,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:27:39,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 42, 29] total 133 [2023-11-28 20:27:39,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114187340] [2023-11-28 20:27:39,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:27:39,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-11-28 20:27:39,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:27:39,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-11-28 20:27:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=16834, Unknown=0, NotChecked=0, Total=17556 [2023-11-28 20:27:39,600 INFO L87 Difference]: Start difference. First operand 131 states and 139 transitions. Second operand has 133 states, 133 states have (on average 2.4285714285714284) internal successors, (323), 133 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:28:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:28:00,740 INFO L93 Difference]: Finished difference Result 264 states and 292 transitions. [2023-11-28 20:28:00,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-28 20:28:00,741 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.4285714285714284) internal successors, (323), 133 states have internal predecessors, (323), 0 states have call successors, (0), 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 130 [2023-11-28 20:28:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:28:00,743 INFO L225 Difference]: With dead ends: 264 [2023-11-28 20:28:00,743 INFO L226 Difference]: Without dead ends: 260 [2023-11-28 20:28:00,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8373 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=2302, Invalid=33608, Unknown=0, NotChecked=0, Total=35910 [2023-11-28 20:28:00,746 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 269 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 9800 mSolverCounterSat, 1419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 11219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1419 IncrementalHoareTripleChecker+Valid, 9800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:28:00,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 266 Invalid, 11219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1419 Valid, 9800 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2023-11-28 20:28:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-28 20:28:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 132. [2023-11-28 20:28:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:28:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2023-11-28 20:28:00,941 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 130 [2023-11-28 20:28:00,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:28:00,942 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2023-11-28 20:28:00,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.4285714285714284) internal successors, (323), 133 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:28:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2023-11-28 20:28:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-28 20:28:00,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:28:00,942 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:28:00,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-28 20:28:01,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-28 20:28:01,143 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:28:01,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:28:01,143 INFO L85 PathProgramCache]: Analyzing trace with hash 411388507, now seen corresponding path program 29 times [2023-11-28 20:28:01,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:28:01,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076747972] [2023-11-28 20:28:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:28:01,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:28:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:28:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2023-11-28 20:28:01,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:28:01,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076747972] [2023-11-28 20:28:01,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076747972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:28:01,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013692327] [2023-11-28 20:28:01,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:28:01,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:28:01,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:28:01,775 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:28:01,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-28 20:28:02,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-28 20:28:02,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:28:02,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-28 20:28:02,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:28:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2023-11-28 20:28:03,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:28:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2023-11-28 20:28:03,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013692327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:28:03,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:28:03,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2023-11-28 20:28:03,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959015509] [2023-11-28 20:28:03,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:28:03,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-28 20:28:03,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:28:03,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-28 20:28:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2539, Unknown=0, NotChecked=0, Total=3080 [2023-11-28 20:28:03,843 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 56 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 56 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) [2023-11-28 20:28:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:28:05,557 INFO L93 Difference]: Finished difference Result 363 states and 393 transitions. [2023-11-28 20:28:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-28 20:28:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 56 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 131 [2023-11-28 20:28:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:28:05,559 INFO L225 Difference]: With dead ends: 363 [2023-11-28 20:28:05,559 INFO L226 Difference]: Without dead ends: 140 [2023-11-28 20:28:05,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 223 SyntacticMatches, 25 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=857, Invalid=3973, Unknown=0, NotChecked=0, Total=4830 [2023-11-28 20:28:05,560 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-28 20:28:05,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 50 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [763 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-28 20:28:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-28 20:28:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-11-28 20:28:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.064748201438849) internal successors, (148), 139 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:28:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2023-11-28 20:28:05,774 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 131 [2023-11-28 20:28:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:28:05,774 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2023-11-28 20:28:05,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 56 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) [2023-11-28 20:28:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2023-11-28 20:28:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-28 20:28:05,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:28:05,775 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:28:05,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-28 20:28:05,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:28:05,976 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:28:05,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:28:05,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1810259007, now seen corresponding path program 30 times [2023-11-28 20:28:05,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:28:05,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005005141] [2023-11-28 20:28:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:28:05,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:28:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:28:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 120 proven. 699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:28:50,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:28:50,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005005141] [2023-11-28 20:28:50,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005005141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:28:50,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664536976] [2023-11-28 20:28:50,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:28:50,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:28:50,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:28:50,068 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:28:50,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-28 20:28:50,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-28 20:28:50,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:28:50,922 WARN L260 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 467 conjunts are in the unsatisfiable core [2023-11-28 20:28:50,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:28:51,060 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 23 treesize of output 1 [2023-11-28 20:28:51,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-28 20:29:13,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:29:13,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:29:13,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 108 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 128 treesize of output 383 [2023-11-28 20:29:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 4 proven. 809 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:29:14,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:29:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 764 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:29:59,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664536976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:29:59,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:29:59,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 79, 111] total 279 [2023-11-28 20:29:59,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954971264] [2023-11-28 20:29:59,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:29:59,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 279 states [2023-11-28 20:29:59,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:29:59,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 279 interpolants. [2023-11-28 20:29:59,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3599, Invalid=73961, Unknown=2, NotChecked=0, Total=77562 [2023-11-28 20:29:59,592 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand has 279 states, 279 states have (on average 1.4050179211469533) internal successors, (392), 279 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:32:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:32:31,409 INFO L93 Difference]: Finished difference Result 579 states and 640 transitions. [2023-11-28 20:32:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2023-11-28 20:32:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 279 states, 279 states have (on average 1.4050179211469533) internal successors, (392), 279 states have internal predecessors, (392), 0 states have call successors, (0), 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 139 [2023-11-28 20:32:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:32:31,412 INFO L225 Difference]: With dead ends: 579 [2023-11-28 20:32:31,412 INFO L226 Difference]: Without dead ends: 462 [2023-11-28 20:32:31,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 444 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53146 ImplicationChecksByTransitivity, 186.8s TimeCoverageRelationStatistics Valid=13637, Invalid=184831, Unknown=2, NotChecked=0, Total=198470 [2023-11-28 20:32:31,420 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1202 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 24193 mSolverCounterSat, 6503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 30696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6503 IncrementalHoareTripleChecker+Valid, 24193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:32:31,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1202 Valid, 809 Invalid, 30696 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6503 Valid, 24193 Invalid, 0 Unknown, 0 Unchecked, 35.3s Time] [2023-11-28 20:32:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-28 20:32:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 272. [2023-11-28 20:32:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.088560885608856) internal successors, (295), 271 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:32:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 295 transitions. [2023-11-28 20:32:31,900 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 295 transitions. Word has length 139 [2023-11-28 20:32:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:32:31,900 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 295 transitions. [2023-11-28 20:32:31,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 279 states, 279 states have (on average 1.4050179211469533) internal successors, (392), 279 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:32:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 295 transitions. [2023-11-28 20:32:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-28 20:32:31,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:32:31,901 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:32:31,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-28 20:32:32,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:32:32,102 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:32:32,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:32:32,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1310511222, now seen corresponding path program 31 times [2023-11-28 20:32:32,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:32:32,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268052476] [2023-11-28 20:32:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:32:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:32:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:32:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 679 trivial. 0 not checked. [2023-11-28 20:32:32,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:32:32,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268052476] [2023-11-28 20:32:32,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268052476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:32:32,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665666546] [2023-11-28 20:32:32,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:32:32,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:32:32,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:32:32,863 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:32:32,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-28 20:32:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:32:33,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:32:33,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:32:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 679 trivial. 0 not checked. [2023-11-28 20:32:33,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:32:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 679 trivial. 0 not checked. [2023-11-28 20:32:33,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665666546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:32:33,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:32:33,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-28 20:32:33,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978135177] [2023-11-28 20:32:33,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:32:33,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-28 20:32:33,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:32:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-28 20:32:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2023-11-28 20:32:33,703 INFO L87 Difference]: Start difference. First operand 272 states and 295 transitions. Second operand has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 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) [2023-11-28 20:32:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:32:34,591 INFO L93 Difference]: Finished difference Result 529 states and 575 transitions. [2023-11-28 20:32:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-28 20:32:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 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 143 [2023-11-28 20:32:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:32:34,592 INFO L225 Difference]: With dead ends: 529 [2023-11-28 20:32:34,593 INFO L226 Difference]: Without dead ends: 273 [2023-11-28 20:32:34,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 243 SyntacticMatches, 27 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=504, Invalid=1752, Unknown=0, NotChecked=0, Total=2256 [2023-11-28 20:32:34,594 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:32:34,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 102 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:32:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-28 20:32:35,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2023-11-28 20:32:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.088235294117647) internal successors, (296), 272 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:32:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 296 transitions. [2023-11-28 20:32:35,086 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 296 transitions. Word has length 143 [2023-11-28 20:32:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:32:35,086 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 296 transitions. [2023-11-28 20:32:35,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 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) [2023-11-28 20:32:35,086 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 296 transitions. [2023-11-28 20:32:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-28 20:32:35,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:32:35,087 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:32:35,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-28 20:32:35,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:32:35,288 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:32:35,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:32:35,288 INFO L85 PathProgramCache]: Analyzing trace with hash 318692865, now seen corresponding path program 32 times [2023-11-28 20:32:35,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:32:35,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649802812] [2023-11-28 20:32:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:32:35,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:32:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:32:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 78 proven. 118 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2023-11-28 20:32:35,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:32:35,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649802812] [2023-11-28 20:32:35,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649802812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:32:35,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002327452] [2023-11-28 20:32:35,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:32:35,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:32:35,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:32:35,958 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:32:35,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-28 20:32:36,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:32:36,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:32:36,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:32:36,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:32:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2023-11-28 20:32:36,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:32:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2023-11-28 20:32:36,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002327452] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:32:36,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:32:36,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-28 20:32:36,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118893671] [2023-11-28 20:32:36,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:32:36,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-28 20:32:36,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:32:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-28 20:32:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2023-11-28 20:32:36,768 INFO L87 Difference]: Start difference. First operand 273 states and 296 transitions. Second operand has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 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) [2023-11-28 20:32:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:32:37,525 INFO L93 Difference]: Finished difference Result 343 states and 375 transitions. [2023-11-28 20:32:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-28 20:32:37,525 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 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 144 [2023-11-28 20:32:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:32:37,526 INFO L225 Difference]: With dead ends: 343 [2023-11-28 20:32:37,526 INFO L226 Difference]: Without dead ends: 149 [2023-11-28 20:32:37,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 244 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1726, Unknown=0, NotChecked=0, Total=2256 [2023-11-28 20:32:37,527 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:32:37,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 57 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:32:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-28 20:32:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-28 20:32:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0608108108108107) internal successors, (157), 148 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:32:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 157 transitions. [2023-11-28 20:32:37,839 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 157 transitions. Word has length 144 [2023-11-28 20:32:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:32:37,839 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 157 transitions. [2023-11-28 20:32:37,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 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) [2023-11-28 20:32:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 157 transitions. [2023-11-28 20:32:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-28 20:32:37,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:32:37,840 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:32:37,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-28 20:32:38,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:32:38,040 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:32:38,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:32:38,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1226281805, now seen corresponding path program 33 times [2023-11-28 20:32:38,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:32:38,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104293098] [2023-11-28 20:32:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:32:38,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:32:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:33:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 132 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:33:28,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:33:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104293098] [2023-11-28 20:33:28,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104293098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:33:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320270371] [2023-11-28 20:33:28,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:33:28,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:33:28,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:33:28,621 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:33:28,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-28 20:33:29,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-28 20:33:29,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:33:29,245 WARN L260 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 501 conjunts are in the unsatisfiable core [2023-11-28 20:33:29,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:33:29,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:33:29,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-28 20:33:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:33:40,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:33:40,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 86 treesize of output 185 [2023-11-28 20:33:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:33:40,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:33:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 854 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-28 20:33:54,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320270371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:33:54,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:33:54,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 52, 36] total 189 [2023-11-28 20:33:54,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134473411] [2023-11-28 20:33:54,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:33:54,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2023-11-28 20:33:54,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:33:54,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2023-11-28 20:33:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1884, Invalid=33648, Unknown=0, NotChecked=0, Total=35532 [2023-11-28 20:33:54,294 INFO L87 Difference]: Start difference. First operand 149 states and 157 transitions. Second operand has 189 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:50,407 INFO L93 Difference]: Finished difference Result 462 states and 516 transitions. [2023-11-28 20:34:50,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-11-28 20:34:50,407 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 states have internal predecessors, (413), 0 states have call successors, (0), 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 148 [2023-11-28 20:34:50,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:50,409 INFO L225 Difference]: With dead ends: 462 [2023-11-28 20:34:50,409 INFO L226 Difference]: Without dead ends: 296 [2023-11-28 20:34:50,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 227 SyntacticMatches, 21 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22303 ImplicationChecksByTransitivity, 65.2s TimeCoverageRelationStatistics Valid=5824, Invalid=72856, Unknown=0, NotChecked=0, Total=78680 [2023-11-28 20:34:50,412 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 418 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 17145 mSolverCounterSat, 3105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 20250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3105 IncrementalHoareTripleChecker+Valid, 17145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:50,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 608 Invalid, 20250 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3105 Valid, 17145 Invalid, 0 Unknown, 0 Unchecked, 21.2s Time] [2023-11-28 20:34:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-28 20:34:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 151. [2023-11-28 20:34:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.06) internal successors, (159), 150 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 159 transitions. [2023-11-28 20:34:50,732 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 159 transitions. Word has length 148 [2023-11-28 20:34:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:50,732 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 159 transitions. [2023-11-28 20:34:50,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 159 transitions. [2023-11-28 20:34:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-28 20:34:50,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:50,733 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:34:50,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-28 20:34:50,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:50,934 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:50,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:50,934 INFO L85 PathProgramCache]: Analyzing trace with hash 469568914, now seen corresponding path program 34 times [2023-11-28 20:34:50,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:50,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744339971] [2023-11-28 20:34:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:50,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 91 proven. 134 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2023-11-28 20:34:52,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:52,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744339971] [2023-11-28 20:34:52,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744339971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:34:52,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676104207] [2023-11-28 20:34:52,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:34:52,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:52,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:52,076 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:52,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-28 20:34:52,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:34:52,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:34:52,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:34:52,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2023-11-28 20:34:53,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2023-11-28 20:34:53,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676104207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:53,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:34:53,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 79 [2023-11-28 20:34:53,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545757380] [2023-11-28 20:34:53,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:53,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-28 20:34:53,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:53,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-28 20:34:53,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=817, Invalid=5345, Unknown=0, NotChecked=0, Total=6162 [2023-11-28 20:34:53,966 INFO L87 Difference]: Start difference. First operand 151 states and 159 transitions. Second operand has 79 states, 79 states have (on average 1.6075949367088607) internal successors, (127), 79 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) [2023-11-28 20:34:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:55,541 INFO L93 Difference]: Finished difference Result 275 states and 296 transitions. [2023-11-28 20:34:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-28 20:34:55,542 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.6075949367088607) internal successors, (127), 79 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 150 [2023-11-28 20:34:55,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:55,543 INFO L225 Difference]: With dead ends: 275 [2023-11-28 20:34:55,543 INFO L226 Difference]: Without dead ends: 158 [2023-11-28 20:34:55,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 238 SyntacticMatches, 16 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3413 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1209, Invalid=7721, Unknown=0, NotChecked=0, Total=8930 [2023-11-28 20:34:55,544 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:55,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 106 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 20:34:55,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-28 20:34:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2023-11-28 20:34:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0573248407643312) internal successors, (166), 157 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 166 transitions. [2023-11-28 20:34:56,030 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 166 transitions. Word has length 150 [2023-11-28 20:34:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:56,030 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 166 transitions. [2023-11-28 20:34:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.6075949367088607) internal successors, (127), 79 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) [2023-11-28 20:34:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 166 transitions. [2023-11-28 20:34:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-28 20:34:56,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:56,031 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:34:56,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-28 20:34:56,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7191f0fa-9e07-4936-ae58-ae68d97d8be3/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:56,232 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:56,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1784249663, now seen corresponding path program 35 times [2023-11-28 20:34:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:56,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328552094] [2023-11-28 20:34:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat