./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:31:48,213 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:31:48,269 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:31:48,272 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:31:48,273 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:31:48,286 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:31:48,286 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:31:48,287 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:31:48,287 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:31:48,287 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:31:48,288 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:31:48,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:31:48,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:31:48,289 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:31:48,289 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:31:48,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:31:48,289 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:31:48,290 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:31:48,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:31:48,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:31:48,290 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:31:48,294 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:31:48,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:31:48,294 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:31:48,294 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:31:48,295 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:31:48,295 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:31:48,295 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:31:48,295 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:31:48,295 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:31:48,296 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:31:48,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:31:48,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:31:48,296 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:31:48,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:31:48,297 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:31:48,297 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:31:48,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:31:48,298 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:31:48,298 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:31:48,298 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:31:48,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:31:48,302 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 [2024-11-18 14:31:48,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:31:48,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:31:48,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:31:48,518 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:31:48,519 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:31:48,519 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-11-18 14:31:49,733 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:31:49,865 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:31:49,865 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-11-18 14:31:49,872 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d0401c0c/774d75ac03c84d3daedf848647fd8ccb/FLAG29bc5e520 [2024-11-18 14:31:50,305 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d0401c0c/774d75ac03c84d3daedf848647fd8ccb [2024-11-18 14:31:50,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:31:50,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:31:50,308 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:31:50,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:31:50,316 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:31:50,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,318 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e04af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50, skipping insertion in model container [2024-11-18 14:31:50,318 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,335 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:31:50,458 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2024-11-18 14:31:50,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:31:50,487 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:31:50,497 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2024-11-18 14:31:50,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:31:50,529 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:31:50,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50 WrapperNode [2024-11-18 14:31:50,530 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:31:50,531 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:31:50,531 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:31:50,532 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:31:50,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,543 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,558 INFO L138 Inliner]: procedures = 16, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-11-18 14:31:50,559 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:31:50,560 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:31:50,560 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:31:50,560 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:31:50,569 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,571 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,586 INFO L175 MemorySlicer]: Split 41 memory accesses to 5 slices as follows [2, 4, 3, 27, 5]. 66 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 1, 2, 2]. [2024-11-18 14:31:50,586 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,595 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,600 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:31:50,601 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:31:50,601 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:31:50,601 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:31:50,602 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (1/1) ... [2024-11-18 14:31:50,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:31:50,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:31:50,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-18 14:31:50,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-18 14:31:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-18 14:31:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-18 14:31:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:31:50,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:31:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 14:31:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 14:31:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-18 14:31:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-18 14:31:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-18 14:31:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2024-11-18 14:31:50,674 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2024-11-18 14:31:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-18 14:31:50,675 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-18 14:31:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 14:31:50,774 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:31:50,776 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:31:50,898 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-18 14:31:50,898 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:31:50,907 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:31:50,907 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-18 14:31:50,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:31:50 BoogieIcfgContainer [2024-11-18 14:31:50,907 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:31:50,910 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:31:50,911 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:31:50,913 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:31:50,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:31:50" (1/3) ... [2024-11-18 14:31:50,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63145164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:31:50, skipping insertion in model container [2024-11-18 14:31:50,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:31:50" (2/3) ... [2024-11-18 14:31:50,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63145164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:31:50, skipping insertion in model container [2024-11-18 14:31:50,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:31:50" (3/3) ... [2024-11-18 14:31:50,915 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps4-ll.c [2024-11-18 14:31:50,928 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:31:50,928 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:31:51,013 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:31:51,018 INFO L333 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, 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;@7028a6aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:31:51,018 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:31:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 14:31:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-18 14:31:51,026 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:31:51,026 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:31:51,027 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:31:51,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:31:51,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1281718281, now seen corresponding path program 1 times [2024-11-18 14:31:51,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:31:51,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930899717] [2024-11-18 14:31:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:31:51,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:31:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:31:51,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250123555] [2024-11-18 14:31:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:31:51,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:31:51,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:31:51,164 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:31:51,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 14:31:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:31:51,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-18 14:31:51,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:31:51,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:31:51,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:31:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:31:51,462 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 14:31:51,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:31:51,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930899717] [2024-11-18 14:31:51,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:31:51,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250123555] [2024-11-18 14:31:51,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250123555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:31:51,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:31:51,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-18 14:31:51,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965896551] [2024-11-18 14:31:51,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:31:51,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 14:31:51,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:31:51,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 14:31:51,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-18 14:31:51,490 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 14:31:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:31:51,648 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2024-11-18 14:31:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 14:31:51,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-18 14:31:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:31:51,656 INFO L225 Difference]: With dead ends: 61 [2024-11-18 14:31:51,656 INFO L226 Difference]: Without dead ends: 35 [2024-11-18 14:31:51,658 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:31:51,660 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:31:51,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:31:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-18 14:31:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-11-18 14:31:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-18 14:31:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-11-18 14:31:51,694 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 9 [2024-11-18 14:31:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:31:51,695 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-11-18 14:31:51,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 14:31:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-11-18 14:31:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-18 14:31:51,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:31:51,698 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:31:51,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 14:31:51,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-18 14:31:51,902 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:31:51,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:31:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1297908024, now seen corresponding path program 1 times [2024-11-18 14:31:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:31:51,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644303379] [2024-11-18 14:31:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:31:51,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:31:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:31:51,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666931272] [2024-11-18 14:31:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:31:51,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:31:51,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:31:51,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:31:51,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 14:31:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:31:52,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-18 14:31:52,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:31:52,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:31:52,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:31:52,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2024-11-18 14:31:52,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:31:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:31:52,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:31:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 14:31:52,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:31:52,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644303379] [2024-11-18 14:31:52,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:31:52,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666931272] [2024-11-18 14:31:52,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666931272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:31:52,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-18 14:31:52,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-11-18 14:31:52,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050024363] [2024-11-18 14:31:52,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-18 14:31:52,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 14:31:52,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:31:52,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 14:31:52,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-18 14:31:52,607 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:31:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:31:53,208 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-11-18 14:31:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-18 14:31:53,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-18 14:31:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:31:53,211 INFO L225 Difference]: With dead ends: 62 [2024-11-18 14:31:53,211 INFO L226 Difference]: Without dead ends: 60 [2024-11-18 14:31:53,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-11-18 14:31:53,213 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:31:53,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 133 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:31:53,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-18 14:31:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2024-11-18 14:31:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-18 14:31:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-11-18 14:31:53,230 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 19 [2024-11-18 14:31:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:31:53,230 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-11-18 14:31:53,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:31:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-11-18 14:31:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-18 14:31:53,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:31:53,231 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:31:53,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 14:31:53,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-18 14:31:53,436 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:31:53,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:31:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1446753683, now seen corresponding path program 1 times [2024-11-18 14:31:53,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:31:53,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645131864] [2024-11-18 14:31:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:31:53,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:31:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:31:53,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140080640] [2024-11-18 14:31:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:31:53,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:31:53,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:31:53,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:31:53,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 14:31:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:31:53,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-18 14:31:53,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:31:53,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:31:53,547 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 [2024-11-18 14:31:53,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:31:53,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-18 14:31:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:31:53,727 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 14:31:53,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:31:53,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645131864] [2024-11-18 14:31:53,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:31:53,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140080640] [2024-11-18 14:31:53,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140080640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:31:53,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:31:53,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-18 14:31:53,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383908524] [2024-11-18 14:31:53,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:31:53,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 14:31:53,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:31:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 14:31:53,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-18 14:31:53,742 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:31:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:31:53,959 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2024-11-18 14:31:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:31:53,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-11-18 14:31:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:31:53,961 INFO L225 Difference]: With dead ends: 59 [2024-11-18 14:31:53,961 INFO L226 Difference]: Without dead ends: 57 [2024-11-18 14:31:53,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-18 14:31:53,962 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:31:53,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 48 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:31:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-18 14:31:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-18 14:31:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-18 14:31:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2024-11-18 14:31:53,977 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 19 [2024-11-18 14:31:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:31:53,977 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2024-11-18 14:31:53,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-18 14:31:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2024-11-18 14:31:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-18 14:31:53,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:31:53,978 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:31:53,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 14:31:54,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:31:54,179 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:31:54,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:31:54,179 INFO L85 PathProgramCache]: Analyzing trace with hash -61357277, now seen corresponding path program 1 times [2024-11-18 14:31:54,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:31:54,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697212474] [2024-11-18 14:31:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:31:54,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:31:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:31:54,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907665224] [2024-11-18 14:31:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:31:54,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:31:54,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:31:54,226 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:31:54,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 14:31:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:31:54,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-18 14:31:54,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:31:54,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:31:54,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:31:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:31:54,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:31:54,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:31:54,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697212474] [2024-11-18 14:31:54,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:31:54,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907665224] [2024-11-18 14:31:54,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907665224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:31:54,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:31:54,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-18 14:31:54,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727853934] [2024-11-18 14:31:54,755 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:31:54,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 14:31:54,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:31:54,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 14:31:54,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-18 14:31:54,756 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 14:31:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:31:54,925 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2024-11-18 14:31:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 14:31:54,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-11-18 14:31:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:31:54,926 INFO L225 Difference]: With dead ends: 64 [2024-11-18 14:31:54,926 INFO L226 Difference]: Without dead ends: 48 [2024-11-18 14:31:54,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-18 14:31:54,927 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:31:54,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:31:54,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-18 14:31:54,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-18 14:31:54,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.096774193548387) internal successors, (34), 33 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-18 14:31:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2024-11-18 14:31:54,943 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 25 [2024-11-18 14:31:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:31:54,943 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2024-11-18 14:31:54,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-18 14:31:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2024-11-18 14:31:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-18 14:31:54,945 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:31:54,945 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:31:54,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 14:31:55,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:31:55,146 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:31:55,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:31:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash -767367121, now seen corresponding path program 1 times [2024-11-18 14:31:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:31:55,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116538586] [2024-11-18 14:31:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:31:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:31:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:31:55,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696748004] [2024-11-18 14:31:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:31:55,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:31:55,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:31:55,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:31:55,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 14:31:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:31:55,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-18 14:31:55,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:31:55,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:31:55,298 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 [2024-11-18 14:31:55,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:31:55,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-18 14:31:55,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:31:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:31:55,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:31:56,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2024-11-18 14:31:56,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2024-11-18 14:32:04,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:04,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116538586] [2024-11-18 14:32:04,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:32:04,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696748004] [2024-11-18 14:32:04,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696748004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:04,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:32:04,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-18 14:32:04,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049053710] [2024-11-18 14:32:04,667 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:04,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-18 14:32:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-18 14:32:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=436, Unknown=2, NotChecked=0, Total=506 [2024-11-18 14:32:04,669 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 14:32:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:05,051 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2024-11-18 14:32:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 14:32:05,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2024-11-18 14:32:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:05,053 INFO L225 Difference]: With dead ends: 57 [2024-11-18 14:32:05,053 INFO L226 Difference]: Without dead ends: 55 [2024-11-18 14:32:05,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=102, Invalid=652, Unknown=2, NotChecked=0, Total=756 [2024-11-18 14:32:05,054 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:05,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 60 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:32:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-18 14:32:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-18 14:32:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-18 14:32:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2024-11-18 14:32:05,063 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 31 [2024-11-18 14:32:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:05,064 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2024-11-18 14:32:05,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-18 14:32:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2024-11-18 14:32:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 14:32:05,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:05,066 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:05,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 14:32:05,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:05,267 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:05,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:05,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1258131647, now seen corresponding path program 1 times [2024-11-18 14:32:05,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:05,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48725202] [2024-11-18 14:32:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:05,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-18 14:32:05,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510444926] [2024-11-18 14:32:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:32:05,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:05,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:05,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:05,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 14:32:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:32:05,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-18 14:32:05,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:05,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:05,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:05,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:05,421 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 [2024-11-18 14:32:05,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-18 14:32:05,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:32:05,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:32:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:32:06,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:07,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2024-11-18 14:32:07,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2024-11-18 14:32:07,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2024-11-18 14:32:07,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:07,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48725202] [2024-11-18 14:32:07,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:32:07,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510444926] [2024-11-18 14:32:07,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510444926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:07,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:32:07,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-18 14:32:07,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833564587] [2024-11-18 14:32:07,676 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:07,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-18 14:32:07,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:07,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-18 14:32:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-11-18 14:32:07,678 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 14:32:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:08,245 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2024-11-18 14:32:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 14:32:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2024-11-18 14:32:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:08,246 INFO L225 Difference]: With dead ends: 62 [2024-11-18 14:32:08,246 INFO L226 Difference]: Without dead ends: 44 [2024-11-18 14:32:08,247 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2024-11-18 14:32:08,247 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:08,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 54 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 277 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:32:08,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-18 14:32:08,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-18 14:32:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-18 14:32:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-18 14:32:08,259 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 37 [2024-11-18 14:32:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:08,259 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-18 14:32:08,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-18 14:32:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-18 14:32:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-18 14:32:08,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:08,261 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:08,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 14:32:08,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:08,462 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:08,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:08,463 INFO L85 PathProgramCache]: Analyzing trace with hash -780307893, now seen corresponding path program 2 times [2024-11-18 14:32:08,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:08,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748250080] [2024-11-18 14:32:08,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:32:08,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:08,496 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:32:08,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 14:32:08,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567055685] [2024-11-18 14:32:08,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:32:08,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:08,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:08,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:08,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 14:32:08,605 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:32:08,605 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:08,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-11-18 14:32:08,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:08,619 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 [2024-11-18 14:32:08,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:08,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:08,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:08,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-18 14:32:09,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:32:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 14:32:09,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:10,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-18 14:32:10,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-11-18 14:32:11,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:11,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748250080] [2024-11-18 14:32:11,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:32:11,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567055685] [2024-11-18 14:32:11,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567055685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:11,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:32:11,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-18 14:32:11,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210362105] [2024-11-18 14:32:11,434 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:11,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-18 14:32:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-18 14:32:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2024-11-18 14:32:11,435 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 14:32:12,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:12,051 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2024-11-18 14:32:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-18 14:32:12,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 43 [2024-11-18 14:32:12,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:12,053 INFO L225 Difference]: With dead ends: 55 [2024-11-18 14:32:12,053 INFO L226 Difference]: Without dead ends: 53 [2024-11-18 14:32:12,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-11-18 14:32:12,054 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:12,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 87 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:32:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-18 14:32:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-11-18 14:32:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-18 14:32:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-18 14:32:12,071 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 43 [2024-11-18 14:32:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:12,071 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-18 14:32:12,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 14:32:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-18 14:32:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-18 14:32:12,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:12,072 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:12,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 14:32:12,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:12,273 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:12,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1676561433, now seen corresponding path program 3 times [2024-11-18 14:32:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:12,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687360695] [2024-11-18 14:32:12,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:32:12,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:12,320 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-18 14:32:12,320 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 14:32:12,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669559885] [2024-11-18 14:32:12,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:32:12,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:12,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:12,324 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:12,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 14:32:12,552 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:32:12,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:12,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-11-18 14:32:12,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:12,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:12,571 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 [2024-11-18 14:32:12,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:12,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:13,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-18 14:32:13,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:32:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 46 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 14:32:13,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:15,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-18 14:32:15,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-11-18 14:32:16,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:16,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687360695] [2024-11-18 14:32:16,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:32:16,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669559885] [2024-11-18 14:32:16,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669559885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:16,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:32:16,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-18 14:32:16,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229163217] [2024-11-18 14:32:16,857 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:16,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-18 14:32:16,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-18 14:32:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2024-11-18 14:32:16,858 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 14:32:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:17,613 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2024-11-18 14:32:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 14:32:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 55 [2024-11-18 14:32:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:17,614 INFO L225 Difference]: With dead ends: 63 [2024-11-18 14:32:17,614 INFO L226 Difference]: Without dead ends: 61 [2024-11-18 14:32:17,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2024-11-18 14:32:17,616 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:17,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 127 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-18 14:32:17,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-18 14:32:17,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-11-18 14:32:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-18 14:32:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-18 14:32:17,623 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 55 [2024-11-18 14:32:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:17,624 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-18 14:32:17,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 14:32:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-18 14:32:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-18 14:32:17,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:17,625 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:17,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-18 14:32:17,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-18 14:32:17,826 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:17,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1320029443, now seen corresponding path program 4 times [2024-11-18 14:32:17,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:17,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638482159] [2024-11-18 14:32:17,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:32:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:17,911 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:32:17,912 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 14:32:17,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011068623] [2024-11-18 14:32:17,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:32:17,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:17,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:17,918 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:17,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 14:32:19,816 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:32:19,817 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:19,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 215 conjuncts are in the unsatisfiable core [2024-11-18 14:32:19,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:19,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:19,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:19,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-18 14:32:20,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-18 14:32:20,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:32:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-18 14:32:20,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:22,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-18 14:32:22,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-11-18 14:32:28,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:28,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638482159] [2024-11-18 14:32:28,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:32:28,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011068623] [2024-11-18 14:32:28,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011068623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:28,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:32:28,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-18 14:32:28,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710718378] [2024-11-18 14:32:28,038 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:28,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 14:32:28,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:28,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 14:32:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2024-11-18 14:32:28,039 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 22 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-18 14:32:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:28,688 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2024-11-18 14:32:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 14:32:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 67 [2024-11-18 14:32:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:28,690 INFO L225 Difference]: With dead ends: 65 [2024-11-18 14:32:28,690 INFO L226 Difference]: Without dead ends: 63 [2024-11-18 14:32:28,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 14:32:28,691 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:28,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 141 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:32:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-18 14:32:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-11-18 14:32:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (20), 11 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-18 14:32:28,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-11-18 14:32:28,701 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 67 [2024-11-18 14:32:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:28,701 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-11-18 14:32:28,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-18 14:32:28,701 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-11-18 14:32:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-18 14:32:28,702 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:28,702 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:28,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-18 14:32:28,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:28,904 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:28,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1540822491, now seen corresponding path program 2 times [2024-11-18 14:32:28,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:28,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980765500] [2024-11-18 14:32:28,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:32:28,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:28,931 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:32:28,932 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 14:32:28,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193148927] [2024-11-18 14:32:28,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:32:28,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:28,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:28,935 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:28,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 14:32:29,079 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:32:29,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:29,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-18 14:32:29,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:29,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:29,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:29,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:29,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2024-11-18 14:32:29,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:32:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-18 14:32:29,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:31,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-11-18 14:32:31,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 20 [2024-11-18 14:32:34,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:34,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980765500] [2024-11-18 14:32:34,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:32:34,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193148927] [2024-11-18 14:32:34,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193148927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:34,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:32:34,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-18 14:32:34,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903328364] [2024-11-18 14:32:34,533 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:34,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-18 14:32:34,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:34,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-18 14:32:34,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:32:34,534 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 16 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-18 14:32:35,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:35,061 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2024-11-18 14:32:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-18 14:32:35,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 49 [2024-11-18 14:32:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:35,062 INFO L225 Difference]: With dead ends: 70 [2024-11-18 14:32:35,062 INFO L226 Difference]: Without dead ends: 56 [2024-11-18 14:32:35,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2024-11-18 14:32:35,063 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:35,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 93 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 313 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:32:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-18 14:32:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-18 14:32:35,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (18), 11 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-18 14:32:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2024-11-18 14:32:35,071 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 49 [2024-11-18 14:32:35,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:35,072 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2024-11-18 14:32:35,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-18 14:32:35,072 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2024-11-18 14:32:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-18 14:32:35,073 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:35,073 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:35,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-18 14:32:35,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-18 14:32:35,273 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:35,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:35,274 INFO L85 PathProgramCache]: Analyzing trace with hash -393683553, now seen corresponding path program 5 times [2024-11-18 14:32:35,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:35,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626739397] [2024-11-18 14:32:35,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:32:35,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:35,363 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-18 14:32:35,363 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 14:32:35,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914774094] [2024-11-18 14:32:35,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:32:35,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:35,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:35,371 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:35,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-18 14:32:35,947 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-18 14:32:35,947 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:35,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-11-18 14:32:35,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:35,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:35,963 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 [2024-11-18 14:32:35,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:36,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-18 14:32:36,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:32:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-11-18 14:32:36,780 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:39,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-18 14:32:39,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-11-18 14:32:41,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:32:41,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626739397] [2024-11-18 14:32:41,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:32:41,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914774094] [2024-11-18 14:32:41,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914774094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:32:41,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:32:41,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-18 14:32:41,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107876127] [2024-11-18 14:32:41,167 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:32:41,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 14:32:41,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:32:41,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 14:32:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2024-11-18 14:32:41,168 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-18 14:32:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:32:41,847 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-11-18 14:32:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-18 14:32:41,848 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 79 [2024-11-18 14:32:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:32:41,849 INFO L225 Difference]: With dead ends: 67 [2024-11-18 14:32:41,849 INFO L226 Difference]: Without dead ends: 65 [2024-11-18 14:32:41,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=129, Invalid=1277, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 14:32:41,849 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:32:41,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:32:41,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-18 14:32:41,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2024-11-18 14:32:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 11 states have return successors, (21), 12 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-18 14:32:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2024-11-18 14:32:41,868 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 79 [2024-11-18 14:32:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:32:41,868 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2024-11-18 14:32:41,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-18 14:32:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2024-11-18 14:32:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-18 14:32:41,869 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:32:41,869 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:32:41,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-18 14:32:42,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-18 14:32:42,070 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:32:42,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:32:42,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1732070793, now seen corresponding path program 3 times [2024-11-18 14:32:42,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:32:42,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019511529] [2024-11-18 14:32:42,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:32:42,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:32:42,107 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-18 14:32:42,107 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 14:32:42,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565550249] [2024-11-18 14:32:42,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:32:42,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:32:42,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:32:42,111 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:32:42,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-18 14:32:42,362 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:32:42,362 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:32:42,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 217 conjuncts are in the unsatisfiable core [2024-11-18 14:32:42,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:32:42,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:42,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:42,382 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 [2024-11-18 14:32:42,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:32:42,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-18 14:32:43,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2024-11-18 14:32:43,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:32:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-18 14:32:43,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:32:50,205 WARN L286 SmtUtils]: Spent 5.28s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-18 14:32:56,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2024-11-18 14:32:56,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2024-11-18 14:32:56,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2024-11-18 14:33:07,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:33:07,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019511529] [2024-11-18 14:33:07,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-18 14:33:07,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565550249] [2024-11-18 14:33:07,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565550249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:33:07,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:33:07,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-18 14:33:07,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778202493] [2024-11-18 14:33:07,346 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-18 14:33:07,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-18 14:33:07,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:33:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-18 14:33:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=735, Unknown=1, NotChecked=0, Total=812 [2024-11-18 14:33:07,347 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 21 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-18 14:33:08,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:33:08,720 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-11-18 14:33:08,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-18 14:33:08,720 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 61 [2024-11-18 14:33:08,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:33:08,721 INFO L225 Difference]: With dead ends: 72 [2024-11-18 14:33:08,721 INFO L226 Difference]: Without dead ends: 58 [2024-11-18 14:33:08,722 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=160, Invalid=1479, Unknown=1, NotChecked=0, Total=1640 [2024-11-18 14:33:08,722 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-18 14:33:08,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 116 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 472 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2024-11-18 14:33:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-18 14:33:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-18 14:33:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 11 states have return successors, (19), 12 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-18 14:33:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2024-11-18 14:33:08,734 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 61 [2024-11-18 14:33:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:33:08,734 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2024-11-18 14:33:08,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-18 14:33:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2024-11-18 14:33:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-18 14:33:08,735 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:33:08,735 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:33:08,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-18 14:33:08,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-18 14:33:08,939 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:33:08,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:33:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash -647985733, now seen corresponding path program 6 times [2024-11-18 14:33:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:33:08,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696640817] [2024-11-18 14:33:08,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:33:08,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:33:08,989 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-18 14:33:08,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-18 14:33:08,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007278085] [2024-11-18 14:33:08,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:33:08,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:33:08,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:33:08,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:33:08,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-18 14:33:11,936 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-18 14:33:11,936 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:33:11,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 253 conjuncts are in the unsatisfiable core [2024-11-18 14:33:11,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:33:11,963 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 [2024-11-18 14:33:11,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:33:11,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:33:12,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-18 14:33:12,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:33:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 27 proven. 81 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-11-18 14:33:12,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:33:16,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2024-11-18 14:33:16,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35