./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/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_mannadiv.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 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 02:16:00,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 02:16:00,529 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 02:16:00,535 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 02:16:00,536 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 02:16:00,561 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 02:16:00,562 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 02:16:00,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 02:16:00,562 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 02:16:00,563 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 02:16:00,563 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 02:16:00,563 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 02:16:00,564 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 02:16:00,564 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 02:16:00,565 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 02:16:00,566 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 02:16:00,566 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 02:16:00,569 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 02:16:00,569 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 02:16:00,569 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 02:16:00,569 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 02:16:00,570 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 02:16:00,570 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 02:16:00,570 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 02:16:00,572 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 02:16:00,572 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 02:16:00,572 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 02:16:00,572 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 02:16:00,572 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 02:16:00,573 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 02:16:00,573 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 02:16:00,573 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 02:16:00,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:16:00,573 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 02:16:00,573 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 02:16:00,574 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 02:16:00,574 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 02:16:00,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 02:16:00,575 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 02:16:00,575 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 02:16:00,575 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 02:16:00,575 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 02:16:00,575 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 [2024-11-22 02:16:00,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 02:16:00,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 02:16:00,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 02:16:00,835 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 02:16:00,835 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 02:16:00,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-11-22 02:16:02,424 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 02:16:02,668 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 02:16:02,673 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-11-22 02:16:02,695 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c56fb90a/31ac2f5da9b74e06b378f8bdf52910db/FLAG729b75202 [2024-11-22 02:16:02,717 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c56fb90a/31ac2f5da9b74e06b378f8bdf52910db [2024-11-22 02:16:02,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 02:16:02,722 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 02:16:02,725 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 02:16:02,725 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 02:16:02,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 02:16:02,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:02,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67521cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02, skipping insertion in model container [2024-11-22 02:16:02,734 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:02,760 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 02:16:02,924 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_mannadiv.c[1105,1118] [2024-11-22 02:16:02,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:16:02,950 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 02:16:02,961 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_mannadiv.c[1105,1118] [2024-11-22 02:16:02,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 02:16:02,993 INFO L204 MainTranslator]: Completed translation [2024-11-22 02:16:02,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02 WrapperNode [2024-11-22 02:16:03,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 02:16:03,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 02:16:03,002 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 02:16:03,002 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 02:16:03,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,021 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,042 INFO L138 Inliner]: procedures = 16, calls = 57, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2024-11-22 02:16:03,042 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 02:16:03,043 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 02:16:03,043 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 02:16:03,043 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 02:16:03,051 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,053 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,064 INFO L175 MemorySlicer]: Split 31 memory accesses to 6 slices as follows [2, 5, 7, 5, 5, 7]. 23 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 1, 3, 2, 1, 3]. [2024-11-22 02:16:03,065 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,065 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,070 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,073 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,074 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 02:16:03,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 02:16:03,080 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 02:16:03,080 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 02:16:03,080 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (1/1) ... [2024-11-22 02:16:03,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 02:16:03,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:03,118 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) [2024-11-22 02:16:03,120 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 [2024-11-22 02:16:03,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 02:16:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-22 02:16:03,158 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-22 02:16:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 02:16:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 02:16:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 02:16:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-22 02:16:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-22 02:16:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-22 02:16:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 02:16:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 02:16:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 02:16:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-22 02:16:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-22 02:16:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-22 02:16:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-22 02:16:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_42_0 [2024-11-22 02:16:03,160 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_42_0 [2024-11-22 02:16:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 02:16:03,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 02:16:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 02:16:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 02:16:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-22 02:16:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-22 02:16:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-22 02:16:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-22 02:16:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-22 02:16:03,161 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-22 02:16:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 02:16:03,287 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 02:16:03,306 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 02:16:03,637 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-22 02:16:03,637 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 02:16:03,649 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 02:16:03,649 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-22 02:16:03,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:16:03 BoogieIcfgContainer [2024-11-22 02:16:03,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 02:16:03,651 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 02:16:03,651 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 02:16:03,654 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 02:16:03,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:16:02" (1/3) ... [2024-11-22 02:16:03,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f9a3c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:16:03, skipping insertion in model container [2024-11-22 02:16:03,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:02" (2/3) ... [2024-11-22 02:16:03,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f9a3c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:16:03, skipping insertion in model container [2024-11-22 02:16:03,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:16:03" (3/3) ... [2024-11-22 02:16:03,656 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_mannadiv.c [2024-11-22 02:16:03,668 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 02:16:03,668 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 02:16:03,718 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 02:16:03,725 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;@7bb0a7d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 02:16:03,729 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 02:16:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-22 02:16:03,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-22 02:16:03,741 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:03,742 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:03,743 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:03,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1441555117, now seen corresponding path program 1 times [2024-11-22 02:16:03,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:03,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312780460] [2024-11-22 02:16:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:03,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 02:16:04,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:04,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312780460] [2024-11-22 02:16:04,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312780460] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:04,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521993790] [2024-11-22 02:16:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:04,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:04,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:04,067 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) [2024-11-22 02:16:04,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 02:16:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:04,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-22 02:16:04,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 02:16:04,203 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:16:04,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521993790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:04,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:04,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-22 02:16:04,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997179847] [2024-11-22 02:16:04,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:04,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 02:16:04,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:04,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 02:16:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 02:16:04,238 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 02:16:04,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:04,256 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2024-11-22 02:16:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 02:16:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-11-22 02:16:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:04,264 INFO L225 Difference]: With dead ends: 61 [2024-11-22 02:16:04,264 INFO L226 Difference]: Without dead ends: 28 [2024-11-22 02:16:04,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 02:16:04,270 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:04,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 02:16:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-22 02:16:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-22 02:16:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-22 02:16:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-22 02:16:04,303 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2024-11-22 02:16:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:04,303 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-22 02:16:04,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 02:16:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-22 02:16:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-22 02:16:04,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:04,305 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:04,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 02:16:04,508 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 [2024-11-22 02:16:04,509 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:04,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:04,510 INFO L85 PathProgramCache]: Analyzing trace with hash 554271793, now seen corresponding path program 1 times [2024-11-22 02:16:04,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:04,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539260405] [2024-11-22 02:16:04,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:04,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:04,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195097420] [2024-11-22 02:16:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:04,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:04,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:04,589 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) [2024-11-22 02:16:04,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 02:16:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:04,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-22 02:16:04,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:04,736 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 [2024-11-22 02:16:04,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:16:04,756 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 [2024-11-22 02:16:04,762 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 [2024-11-22 02:16:04,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-22 02:16:04,894 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 15 treesize of output 7 [2024-11-22 02:16:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:04,937 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:16:04,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:04,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539260405] [2024-11-22 02:16:04,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:04,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195097420] [2024-11-22 02:16:04,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195097420] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:04,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:16:04,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-22 02:16:04,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612422186] [2024-11-22 02:16:04,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:04,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 02:16:04,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:04,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 02:16:04,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-22 02:16:04,943 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 02:16:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:05,085 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2024-11-22 02:16:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 02:16:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-22 02:16:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:05,087 INFO L225 Difference]: With dead ends: 43 [2024-11-22 02:16:05,087 INFO L226 Difference]: Without dead ends: 41 [2024-11-22 02:16:05,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-22 02:16:05,088 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:05,089 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 135 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 02:16:05,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-22 02:16:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-11-22 02:16:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-22 02:16:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-11-22 02:16:05,096 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 21 [2024-11-22 02:16:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:05,096 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-11-22 02:16:05,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 02:16:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-11-22 02:16:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-22 02:16:05,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:05,097 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:05,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 02:16:05,297 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 [2024-11-22 02:16:05,298 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:05,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:05,299 INFO L85 PathProgramCache]: Analyzing trace with hash -730437634, now seen corresponding path program 1 times [2024-11-22 02:16:05,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:05,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418159723] [2024-11-22 02:16:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:05,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:05,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997230047] [2024-11-22 02:16:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:05,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:05,339 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) [2024-11-22 02:16:05,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 02:16:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:05,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-22 02:16:05,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:05,419 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 [2024-11-22 02:16:05,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 02:16:05,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:16:05,443 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 11 treesize of output 7 [2024-11-22 02:16:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:05,636 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 02:16:05,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418159723] [2024-11-22 02:16:05,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:05,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997230047] [2024-11-22 02:16:05,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997230047] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 02:16:05,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 02:16:05,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-22 02:16:05,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123939033] [2024-11-22 02:16:05,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 02:16:05,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 02:16:05,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:05,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 02:16:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-22 02:16:05,640 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 02:16:05,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:05,947 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2024-11-22 02:16:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 02:16:05,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-11-22 02:16:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:05,950 INFO L225 Difference]: With dead ends: 49 [2024-11-22 02:16:05,950 INFO L226 Difference]: Without dead ends: 39 [2024-11-22 02:16:05,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-11-22 02:16:05,952 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:05,956 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 68 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-22 02:16:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-22 02:16:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-22 02:16:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-22 02:16:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-22 02:16:05,968 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2024-11-22 02:16:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:05,969 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-22 02:16:05,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 02:16:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-22 02:16:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-22 02:16:05,970 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:05,970 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:05,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 02:16:06,170 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 [2024-11-22 02:16:06,172 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:06,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:06,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1523322128, now seen corresponding path program 1 times [2024-11-22 02:16:06,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:06,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630351575] [2024-11-22 02:16:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:06,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:06,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728960590] [2024-11-22 02:16:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:06,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:06,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:06,233 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) [2024-11-22 02:16:06,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 02:16:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:06,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-22 02:16:06,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:06,339 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 [2024-11-22 02:16:06,341 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 [2024-11-22 02:16:06,349 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 [2024-11-22 02:16:06,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:16:06,359 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 [2024-11-22 02:16:06,571 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 [2024-11-22 02:16:06,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-11-22 02:16:06,583 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 [2024-11-22 02:16:06,723 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 21 treesize of output 13 [2024-11-22 02:16:06,725 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 17 treesize of output 9 [2024-11-22 02:16:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:06,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 02:16:07,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:07,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630351575] [2024-11-22 02:16:07,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:07,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728960590] [2024-11-22 02:16:07,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728960590] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:16:07,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-22 02:16:07,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-11-22 02:16:07,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371317020] [2024-11-22 02:16:07,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:07,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 02:16:07,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:07,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 02:16:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-22 02:16:07,021 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 02:16:07,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:07,689 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2024-11-22 02:16:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 02:16:07,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2024-11-22 02:16:07,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:07,692 INFO L225 Difference]: With dead ends: 60 [2024-11-22 02:16:07,692 INFO L226 Difference]: Without dead ends: 56 [2024-11-22 02:16:07,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-11-22 02:16:07,693 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:07,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 264 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-22 02:16:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-22 02:16:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2024-11-22 02:16:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-22 02:16:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-22 02:16:07,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 32 [2024-11-22 02:16:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:07,718 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-22 02:16:07,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-22 02:16:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-22 02:16:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-22 02:16:07,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:07,719 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:07,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 02:16:07,920 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 [2024-11-22 02:16:07,920 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:07,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1572646312, now seen corresponding path program 1 times [2024-11-22 02:16:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:07,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066412128] [2024-11-22 02:16:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:07,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:07,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56440409] [2024-11-22 02:16:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:07,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:07,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:07,950 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) [2024-11-22 02:16:07,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 02:16:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:08,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-22 02:16:08,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:08,049 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 [2024-11-22 02:16:08,054 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 [2024-11-22 02:16:08,058 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 [2024-11-22 02:16:08,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:16:08,082 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 11 treesize of output 7 [2024-11-22 02:16:08,427 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 [2024-11-22 02:16:08,630 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 [2024-11-22 02:16:08,637 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 [2024-11-22 02:16:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 02:16:08,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:09,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:09,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066412128] [2024-11-22 02:16:09,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:09,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56440409] [2024-11-22 02:16:09,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56440409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:09,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:09,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-22 02:16:09,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315446092] [2024-11-22 02:16:09,603 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:09,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 02:16:09,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 02:16:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-11-22 02:16:09,605 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 02:16:10,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:10,233 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2024-11-22 02:16:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 02:16:10,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2024-11-22 02:16:10,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:10,237 INFO L225 Difference]: With dead ends: 61 [2024-11-22 02:16:10,237 INFO L226 Difference]: Without dead ends: 51 [2024-11-22 02:16:10,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2024-11-22 02:16:10,238 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:10,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 109 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-22 02:16:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-22 02:16:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-22 02:16:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-22 02:16:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-22 02:16:10,248 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 44 [2024-11-22 02:16:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:10,249 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-22 02:16:10,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 02:16:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-22 02:16:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-22 02:16:10,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:10,251 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:10,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 02:16:10,454 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 [2024-11-22 02:16:10,455 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:10,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:10,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1904672534, now seen corresponding path program 1 times [2024-11-22 02:16:10,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:10,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179594235] [2024-11-22 02:16:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:10,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-22 02:16:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770765218] [2024-11-22 02:16:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:10,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:10,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:10,504 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) [2024-11-22 02:16:10,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 02:16:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:10,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-22 02:16:10,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:10,724 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 [2024-11-22 02:16:10,726 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 [2024-11-22 02:16:10,731 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 [2024-11-22 02:16:10,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:16:10,741 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 [2024-11-22 02:16:10,758 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 11 treesize of output 7 [2024-11-22 02:16:23,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-22 02:16:23,685 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 [2024-11-22 02:16:23,710 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 7 treesize of output 3 [2024-11-22 02:16:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 02:16:23,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:24,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:24,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179594235] [2024-11-22 02:16:24,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770765218] [2024-11-22 02:16:24,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770765218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:24,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:24,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-22 02:16:24,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922264515] [2024-11-22 02:16:24,366 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:24,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 02:16:24,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:24,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 02:16:24,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=401, Unknown=2, NotChecked=0, Total=462 [2024-11-22 02:16:24,368 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 02:16:28,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-22 02:16:32,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-22 02:16:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:36,892 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2024-11-22 02:16:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 02:16:36,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2024-11-22 02:16:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:36,895 INFO L225 Difference]: With dead ends: 59 [2024-11-22 02:16:36,895 INFO L226 Difference]: Without dead ends: 53 [2024-11-22 02:16:36,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=121, Invalid=807, Unknown=2, NotChecked=0, Total=930 [2024-11-22 02:16:36,897 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:36,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 115 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 380 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2024-11-22 02:16:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-22 02:16:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2024-11-22 02:16:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-22 02:16:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-11-22 02:16:36,914 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 44 [2024-11-22 02:16:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:36,915 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-11-22 02:16:36,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-22 02:16:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-11-22 02:16:36,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-22 02:16:36,916 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:36,916 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:36,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 02:16:37,117 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 [2024-11-22 02:16:37,118 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:37,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash 521911252, now seen corresponding path program 2 times [2024-11-22 02:16:37,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:37,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882566550] [2024-11-22 02:16:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:16:37,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:37,212 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:16:37,212 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 02:16:37,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518247919] [2024-11-22 02:16:37,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:16:37,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:37,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:37,216 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) [2024-11-22 02:16:37,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 02:16:37,342 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:16:37,342 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:16:37,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-11-22 02:16:37,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:37,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 02:16:37,370 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 [2024-11-22 02:16:37,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:16:37,388 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 11 treesize of output 7 [2024-11-22 02:16:37,998 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 [2024-11-22 02:16:38,597 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 21 treesize of output 13 [2024-11-22 02:16:38,600 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 17 treesize of output 9 [2024-11-22 02:16:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 02:16:38,675 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:40,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 02:16:40,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 53 [2024-11-22 02:16:40,896 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 50 treesize of output 46 [2024-11-22 02:16:41,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:41,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882566550] [2024-11-22 02:16:41,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:41,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518247919] [2024-11-22 02:16:41,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518247919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:41,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:41,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-22 02:16:41,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945905473] [2024-11-22 02:16:41,064 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:41,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 02:16:41,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 02:16:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-11-22 02:16:41,066 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-22 02:16:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:42,018 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-11-22 02:16:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 02:16:42,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 57 [2024-11-22 02:16:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:42,021 INFO L225 Difference]: With dead ends: 61 [2024-11-22 02:16:42,021 INFO L226 Difference]: Without dead ends: 55 [2024-11-22 02:16:42,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2024-11-22 02:16:42,023 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:42,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 141 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-22 02:16:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-22 02:16:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-11-22 02:16:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2024-11-22 02:16:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-11-22 02:16:42,037 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 57 [2024-11-22 02:16:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:42,039 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-11-22 02:16:42,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-22 02:16:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-11-22 02:16:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-22 02:16:42,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:42,040 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:42,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 02:16:42,241 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 [2024-11-22 02:16:42,241 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:42,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash 668379412, now seen corresponding path program 2 times [2024-11-22 02:16:42,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:42,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369260768] [2024-11-22 02:16:42,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:16:42,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:42,356 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:16:42,356 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 02:16:42,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883575830] [2024-11-22 02:16:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:16:42,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:42,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:42,371 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) [2024-11-22 02:16:42,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 02:16:42,496 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:16:42,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:16:42,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-22 02:16:42,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:42,513 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 [2024-11-22 02:16:42,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:16:42,520 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 [2024-11-22 02:16:42,534 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 11 treesize of output 7 [2024-11-22 02:16:43,017 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 [2024-11-22 02:16:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-22 02:16:43,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:43,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:43,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369260768] [2024-11-22 02:16:43,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:43,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883575830] [2024-11-22 02:16:43,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883575830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:43,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:43,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-22 02:16:43,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534450184] [2024-11-22 02:16:43,701 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:43,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 02:16:43,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:43,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 02:16:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2024-11-22 02:16:43,703 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-22 02:16:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:44,289 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-11-22 02:16:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 02:16:44,289 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 57 [2024-11-22 02:16:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:44,290 INFO L225 Difference]: With dead ends: 63 [2024-11-22 02:16:44,291 INFO L226 Difference]: Without dead ends: 57 [2024-11-22 02:16:44,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-11-22 02:16:44,292 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:44,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-22 02:16:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-22 02:16:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-11-22 02:16:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2024-11-22 02:16:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-11-22 02:16:44,309 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 57 [2024-11-22 02:16:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:44,309 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-11-22 02:16:44,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.25) internal successors, (27), 13 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-22 02:16:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-11-22 02:16:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-22 02:16:44,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:44,310 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:44,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 02:16:44,511 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 [2024-11-22 02:16:44,511 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:44,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 740765970, now seen corresponding path program 1 times [2024-11-22 02:16:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:44,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077117975] [2024-11-22 02:16:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-22 02:16:45,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:45,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077117975] [2024-11-22 02:16:45,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077117975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:45,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485383308] [2024-11-22 02:16:45,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 02:16:45,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:45,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:45,381 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) [2024-11-22 02:16:45,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 02:16:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 02:16:45,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-22 02:16:45,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:45,528 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 [2024-11-22 02:16:45,531 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 [2024-11-22 02:16:45,654 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 [2024-11-22 02:16:45,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-22 02:16:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-22 02:16:45,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:46,129 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 [2024-11-22 02:16:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 02:16:46,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485383308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 02:16:46,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 02:16:46,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 26 [2024-11-22 02:16:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494782641] [2024-11-22 02:16:46,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:46,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-22 02:16:46,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:46,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-22 02:16:46,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-11-22 02:16:46,409 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 26 states, 19 states have (on average 2.526315789473684) internal successors, (48), 23 states have internal predecessors, (48), 14 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 10 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-22 02:16:47,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:47,050 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2024-11-22 02:16:47,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 02:16:47,051 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.526315789473684) internal successors, (48), 23 states have internal predecessors, (48), 14 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 10 states have call predecessors, (16), 13 states have call successors, (16) Word has length 57 [2024-11-22 02:16:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:47,052 INFO L225 Difference]: With dead ends: 76 [2024-11-22 02:16:47,053 INFO L226 Difference]: Without dead ends: 68 [2024-11-22 02:16:47,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2024-11-22 02:16:47,054 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:47,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 125 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-22 02:16:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-22 02:16:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2024-11-22 02:16:47,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 10 states have call successors, (10), 7 states have call predecessors, (10), 11 states have return successors, (24), 13 states have call predecessors, (24), 9 states have call successors, (24) [2024-11-22 02:16:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2024-11-22 02:16:47,076 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 57 [2024-11-22 02:16:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:47,076 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2024-11-22 02:16:47,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.526315789473684) internal successors, (48), 23 states have internal predecessors, (48), 14 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 10 states have call predecessors, (16), 13 states have call successors, (16) [2024-11-22 02:16:47,077 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2024-11-22 02:16:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-22 02:16:47,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:47,078 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:47,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 02:16:47,279 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 [2024-11-22 02:16:47,280 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:47,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2124511340, now seen corresponding path program 3 times [2024-11-22 02:16:47,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:47,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937389115] [2024-11-22 02:16:47,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:16:47,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:47,332 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-22 02:16:47,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 02:16:47,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479391203] [2024-11-22 02:16:47,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:16:47,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:47,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:47,337 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) [2024-11-22 02:16:47,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 02:16:47,531 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 02:16:47,531 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:16:47,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 214 conjuncts are in the unsatisfiable core [2024-11-22 02:16:47,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:47,547 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 [2024-11-22 02:16:47,550 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 15 treesize of output 1 [2024-11-22 02:16:47,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:16:47,577 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 [2024-11-22 02:16:47,582 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 [2024-11-22 02:16:47,596 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 11 treesize of output 7 [2024-11-22 02:16:48,270 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 28 treesize of output 24 [2024-11-22 02:16:48,274 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 24 treesize of output 20 [2024-11-22 02:16:48,848 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 [2024-11-22 02:16:48,888 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 21 treesize of output 13 [2024-11-22 02:16:48,890 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 17 treesize of output 9 [2024-11-22 02:16:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-22 02:16:48,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:16:55,687 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|))) (let ((.cse3 (select .cse2 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|)) (.cse4 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_21| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_21| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14| Int)) (= (+ (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_28|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_28|) (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_21|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_21|) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12|))) (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14|))))) (and (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_21| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_21| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14| Int)) (let ((.cse0 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_21|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_21|)) (.cse1 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14|))) (or (= (+ (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_28|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_28|) (* .cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12|))) .cse1) (not (= (+ (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse2 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| (+ .cse3 2))) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_28|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_28|) (* .cse0 (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_12|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_12|))) .cse1))))) (or (= 2 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|)) .cse4) (or (= (+ .cse3 2 (* (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|) |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|) (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|))) (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|)) .cse4)))) is different from false [2024-11-22 02:16:56,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:16:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937389115] [2024-11-22 02:16:56,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:16:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479391203] [2024-11-22 02:16:56,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479391203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:16:56,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:16:56,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-22 02:16:56,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782418187] [2024-11-22 02:16:56,341 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:16:56,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 02:16:56,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:16:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 02:16:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=786, Unknown=1, NotChecked=56, Total=930 [2024-11-22 02:16:56,343 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-22 02:16:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:16:57,764 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2024-11-22 02:16:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 02:16:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 70 [2024-11-22 02:16:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:16:57,767 INFO L225 Difference]: With dead ends: 71 [2024-11-22 02:16:57,767 INFO L226 Difference]: Without dead ends: 65 [2024-11-22 02:16:57,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=183, Invalid=1542, Unknown=1, NotChecked=80, Total=1806 [2024-11-22 02:16:57,768 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-22 02:16:57,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 155 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-22 02:16:57,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-22 02:16:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2024-11-22 02:16:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 10 states have call successors, (10), 7 states have call predecessors, (10), 12 states have return successors, (26), 14 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-22 02:16:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2024-11-22 02:16:57,790 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 70 [2024-11-22 02:16:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:16:57,790 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2024-11-22 02:16:57,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-22 02:16:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2024-11-22 02:16:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-22 02:16:57,791 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:16:57,791 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:16:57,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 02:16:57,991 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 [2024-11-22 02:16:57,992 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:16:57,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:16:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1381148886, now seen corresponding path program 4 times [2024-11-22 02:16:57,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:16:57,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092084030] [2024-11-22 02:16:57,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 02:16:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:16:58,025 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 02:16:58,025 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 02:16:58,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967652182] [2024-11-22 02:16:58,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 02:16:58,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:16:58,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:16:58,031 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) [2024-11-22 02:16:58,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 02:16:58,341 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 02:16:58,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:16:58,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-22 02:16:58,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:16:58,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 02:16:58,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:16:58,371 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 [2024-11-22 02:16:58,400 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 11 treesize of output 7 [2024-11-22 02:16:59,481 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 [2024-11-22 02:16:59,615 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-11-22 02:16:59,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:00,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:00,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092084030] [2024-11-22 02:17:00,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:17:00,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967652182] [2024-11-22 02:17:00,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967652182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:00,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:17:00,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-22 02:17:00,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738952020] [2024-11-22 02:17:00,851 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:00,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 02:17:00,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:00,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 02:17:00,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-11-22 02:17:00,852 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-22 02:17:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:01,374 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2024-11-22 02:17:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 02:17:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 83 [2024-11-22 02:17:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:01,375 INFO L225 Difference]: With dead ends: 73 [2024-11-22 02:17:01,376 INFO L226 Difference]: Without dead ends: 67 [2024-11-22 02:17:01,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2024-11-22 02:17:01,377 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:01,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 152 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-22 02:17:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-22 02:17:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-11-22 02:17:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 10 states have call successors, (10), 7 states have call predecessors, (10), 13 states have return successors, (28), 15 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-22 02:17:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2024-11-22 02:17:01,389 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 83 [2024-11-22 02:17:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:01,389 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2024-11-22 02:17:01,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-22 02:17:01,390 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2024-11-22 02:17:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-22 02:17:01,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:01,390 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:17:01,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 02:17:01,591 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 [2024-11-22 02:17:01,591 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:01,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1560056126, now seen corresponding path program 5 times [2024-11-22 02:17:01,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:01,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694650328] [2024-11-22 02:17:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 02:17:01,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:01,641 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-22 02:17:01,641 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 02:17:01,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548621932] [2024-11-22 02:17:01,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 02:17:01,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:01,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:01,653 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) [2024-11-22 02:17:01,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 02:17:01,903 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-22 02:17:01,903 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:17:01,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-22 02:17:01,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:01,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:17:01,942 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 [2024-11-22 02:17:01,947 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 [2024-11-22 02:17:01,962 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 11 treesize of output 7 [2024-11-22 02:17:02,821 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 [2024-11-22 02:17:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-22 02:17:02,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:04,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:04,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694650328] [2024-11-22 02:17:04,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:17:04,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548621932] [2024-11-22 02:17:04,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548621932] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:04,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:17:04,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-22 02:17:04,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589803957] [2024-11-22 02:17:04,196 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:04,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 02:17:04,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:04,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 02:17:04,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2024-11-22 02:17:04,197 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-22 02:17:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:05,129 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2024-11-22 02:17:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 02:17:05,130 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) Word has length 96 [2024-11-22 02:17:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:05,131 INFO L225 Difference]: With dead ends: 75 [2024-11-22 02:17:05,131 INFO L226 Difference]: Without dead ends: 69 [2024-11-22 02:17:05,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2024-11-22 02:17:05,132 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:05,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 203 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-22 02:17:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-22 02:17:05,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2024-11-22 02:17:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 10 states have call successors, (10), 7 states have call predecessors, (10), 14 states have return successors, (30), 16 states have call predecessors, (30), 9 states have call successors, (30) [2024-11-22 02:17:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2024-11-22 02:17:05,150 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 96 [2024-11-22 02:17:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:05,151 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2024-11-22 02:17:05,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-22 02:17:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2024-11-22 02:17:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-22 02:17:05,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:05,152 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:17:05,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 02:17:05,353 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 [2024-11-22 02:17:05,353 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:05,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:05,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1174257646, now seen corresponding path program 3 times [2024-11-22 02:17:05,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:05,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038286887] [2024-11-22 02:17:05,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:17:05,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:05,451 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-22 02:17:05,452 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 02:17:05,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901566707] [2024-11-22 02:17:05,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:17:05,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:05,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:05,457 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) [2024-11-22 02:17:05,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 02:17:05,738 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 02:17:05,738 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:17:05,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 221 conjuncts are in the unsatisfiable core [2024-11-22 02:17:05,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:05,764 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 [2024-11-22 02:17:05,831 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 15 treesize of output 11 [2024-11-22 02:17:05,837 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 [2024-11-22 02:17:05,846 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 [2024-11-22 02:17:05,878 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 11 treesize of output 7 [2024-11-22 02:17:06,244 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 [2024-11-22 02:17:06,452 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 [2024-11-22 02:17:06,896 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 [2024-11-22 02:17:07,138 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 [2024-11-22 02:17:07,355 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 [2024-11-22 02:17:07,373 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 7 treesize of output 3 [2024-11-22 02:17:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-22 02:17:07,542 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:11,150 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 86 treesize of output 82 [2024-11-22 02:17:11,170 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 86 treesize of output 82 [2024-11-22 02:17:11,210 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 86 treesize of output 82 [2024-11-22 02:17:11,243 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 86 treesize of output 82 [2024-11-22 02:17:11,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:11,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038286887] [2024-11-22 02:17:11,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:17:11,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901566707] [2024-11-22 02:17:11,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901566707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:11,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:17:11,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-11-22 02:17:11,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754176588] [2024-11-22 02:17:11,432 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:11,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 02:17:11,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:11,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 02:17:11,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2024-11-22 02:17:11,434 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 25 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-22 02:17:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:12,690 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2024-11-22 02:17:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 02:17:12,691 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 70 [2024-11-22 02:17:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:12,692 INFO L225 Difference]: With dead ends: 75 [2024-11-22 02:17:12,692 INFO L226 Difference]: Without dead ends: 69 [2024-11-22 02:17:12,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2024-11-22 02:17:12,695 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:12,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 170 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-22 02:17:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-22 02:17:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-22 02:17:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 10 states have call successors, (10), 7 states have call predecessors, (10), 15 states have return successors, (32), 17 states have call predecessors, (32), 9 states have call successors, (32) [2024-11-22 02:17:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2024-11-22 02:17:12,712 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 70 [2024-11-22 02:17:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:12,713 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2024-11-22 02:17:12,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-22 02:17:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2024-11-22 02:17:12,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-22 02:17:12,714 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:12,714 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:17:12,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 02:17:12,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 02:17:12,919 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:12,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2036442450, now seen corresponding path program 2 times [2024-11-22 02:17:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169322476] [2024-11-22 02:17:12,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:17:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:12,950 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:17:12,951 INFO L228 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-22 02:17:12,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827593793] [2024-11-22 02:17:12,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 02:17:12,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:12,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 02:17:12,955 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 02:17:12,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 02:17:13,168 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 02:17:13,169 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 02:17:13,177 WARN L253 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 260 conjuncts are in the unsatisfiable core [2024-11-22 02:17:13,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 02:17:13,186 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 [2024-11-22 02:17:13,188 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 [2024-11-22 02:17:13,191 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 [2024-11-22 02:17:13,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-22 02:17:13,200 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 [2024-11-22 02:17:13,216 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 11 treesize of output 7 [2024-11-22 02:17:14,406 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 [2024-11-22 02:17:15,222 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 [2024-11-22 02:17:15,237 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 [2024-11-22 02:17:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-22 02:17:15,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 02:17:21,189 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 68 treesize of output 60 [2024-11-22 02:17:21,198 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 [2024-11-22 02:17:21,208 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 52 [2024-11-22 02:17:25,253 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|))) (let ((.cse0 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|)) (.cse2 (select .cse1 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) (.cse6 (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|)) (.cse5 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_60| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_60| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_35| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_35| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_26| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_26| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_22|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_22|) (+ (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_35|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_35|) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_26|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_26|)) (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_60|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_60|)))))) (and (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_60| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_60| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_26| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_35| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_35| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_26| Int)) (let ((.cse4 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_22|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_22|)) (.cse3 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_35|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_35|))) (or (not (= (+ (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse0 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| 0)) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_60|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_60|) (* (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base| (store .cse1 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset| (+ .cse2 1))) |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_26|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_26|) .cse3)) .cse4)) (= .cse4 (+ (* .cse3 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_26|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_26|)) (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_60|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_60|)))))) (or (= 2 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|)) .cse5) (or .cse5 (= (+ (select .cse0 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|) 2) .cse6)) (or (< (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|) (+ .cse6 (* .cse2 .cse6) 1)) .cse5)))) is different from false [2024-11-22 02:17:31,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 02:17:31,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169322476] [2024-11-22 02:17:31,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-22 02:17:31,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827593793] [2024-11-22 02:17:31,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827593793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 02:17:31,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-22 02:17:31,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-22 02:17:31,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265745968] [2024-11-22 02:17:31,269 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-22 02:17:31,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 02:17:31,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 02:17:31,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 02:17:31,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=741, Unknown=1, NotChecked=54, Total=870 [2024-11-22 02:17:31,272 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 22 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-22 02:17:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 02:17:38,794 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2024-11-22 02:17:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 02:17:38,796 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 70 [2024-11-22 02:17:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 02:17:38,797 INFO L225 Difference]: With dead ends: 79 [2024-11-22 02:17:38,797 INFO L226 Difference]: Without dead ends: 73 [2024-11-22 02:17:38,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=138, Invalid=1347, Unknown=1, NotChecked=74, Total=1560 [2024-11-22 02:17:38,798 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-22 02:17:38,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 183 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-22 02:17:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-22 02:17:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2024-11-22 02:17:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 10 states have call successors, (10), 7 states have call predecessors, (10), 15 states have return successors, (32), 17 states have call predecessors, (32), 9 states have call successors, (32) [2024-11-22 02:17:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2024-11-22 02:17:38,841 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 70 [2024-11-22 02:17:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 02:17:38,842 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2024-11-22 02:17:38,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-22 02:17:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2024-11-22 02:17:38,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-22 02:17:38,842 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 02:17:38,843 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 02:17:38,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 02:17:39,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 02:17:39,051 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 02:17:39,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 02:17:39,055 INFO L85 PathProgramCache]: Analyzing trace with hash 974656364, now seen corresponding path program 3 times [2024-11-22 02:17:39,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 02:17:39,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983422961] [2024-11-22 02:17:39,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 02:17:39,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 02:17:39,169 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-22 02:17:39,175 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat