/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 00:17:03,272 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 00:17:03,340 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 00:17:03,344 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 00:17:03,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 00:17:03,365 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 00:17:03,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 00:17:03,366 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 00:17:03,366 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 00:17:03,369 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 00:17:03,369 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 00:17:03,369 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 00:17:03,369 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 00:17:03,370 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 00:17:03,370 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 00:17:03,370 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 00:17:03,371 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 00:17:03,371 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 00:17:03,371 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 00:17:03,371 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 00:17:03,371 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 00:17:03,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 00:17:03,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 00:17:03,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 00:17:03,372 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 00:17:03,372 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 00:17:03,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 00:17:03,372 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 00:17:03,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 00:17:03,373 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 00:17:03,373 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 00:17:03,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 00:17:03,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 00:17:03,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 00:17:03,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 00:17:03,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 00:17:03,374 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 00:17:03,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 00:17:03,374 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 00:17:03,374 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 00:17:03,374 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 00:17:03,375 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 00:17:03,375 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 00:17:03,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-20 00:17:03,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 00:17:03,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 00:17:03,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 00:17:03,567 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 00:17:03,570 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 00:17:03,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd2-ll.c [2023-12-20 00:17:04,528 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 00:17:04,659 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 00:17:04,659 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd2-ll.c [2023-12-20 00:17:04,664 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8278d181a/7155996a51334b55bfec06ee94d2b59c/FLAGf4ca1db20 [2023-12-20 00:17:04,673 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8278d181a/7155996a51334b55bfec06ee94d2b59c [2023-12-20 00:17:04,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 00:17:04,676 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 00:17:04,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 00:17:04,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 00:17:04,681 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 00:17:04,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f1c9c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04, skipping insertion in model container [2023-12-20 00:17:04,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,698 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 00:17:04,797 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd2-ll.c[1037,1050] [2023-12-20 00:17:04,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 00:17:04,837 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 00:17:04,844 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd2-ll.c[1037,1050] [2023-12-20 00:17:04,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 00:17:04,866 INFO L206 MainTranslator]: Completed translation [2023-12-20 00:17:04,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04 WrapperNode [2023-12-20 00:17:04,866 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 00:17:04,867 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 00:17:04,867 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 00:17:04,867 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 00:17:04,871 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,896 INFO L138 Inliner]: procedures = 17, calls = 141, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 137 [2023-12-20 00:17:04,896 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 00:17:04,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 00:17:04,897 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 00:17:04,897 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 00:17:04,905 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,908 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,923 INFO L175 MemorySlicer]: Split 86 memory accesses to 13 slices as follows [2, 12, 9, 3, 3, 7, 7, 10, 7, 8, 5, 8, 5]. 14 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. The 22 writes are split as follows [0, 1, 1, 1, 1, 2, 3, 2, 3, 2, 2, 2, 2]. [2023-12-20 00:17:04,923 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,923 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,932 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,934 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,935 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,936 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,939 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 00:17:04,940 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 00:17:04,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 00:17:04,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 00:17:04,940 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (1/1) ... [2023-12-20 00:17:04,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 00:17:04,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:17:04,962 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) [2023-12-20 00:17:04,970 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 [2023-12-20 00:17:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 00:17:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-20 00:17:04,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-20 00:17:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 00:17:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 00:17:04,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 00:17:04,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-20 00:17:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-20 00:17:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-12-20 00:17:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-12-20 00:17:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-12-20 00:17:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-12-20 00:17:04,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-12-20 00:17:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-12-20 00:17:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-12-20 00:17:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2023-12-20 00:17:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 00:17:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 00:17:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 00:17:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 00:17:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-20 00:17:04,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-20 00:17:04,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-12-20 00:17:04,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-12-20 00:17:04,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-12-20 00:17:04,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-12-20 00:17:04,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#9 [2023-12-20 00:17:04,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#10 [2023-12-20 00:17:04,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#11 [2023-12-20 00:17:04,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#12 [2023-12-20 00:17:04,990 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_45_to_53_0 [2023-12-20 00:17:04,990 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_45_to_53_0 [2023-12-20 00:17:04,990 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_39_to_65_0 [2023-12-20 00:17:04,991 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_39_to_65_0 [2023-12-20 00:17:04,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 00:17:04,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 00:17:04,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 00:17:04,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 00:17:04,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 00:17:04,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-20 00:17:04,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-20 00:17:04,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-12-20 00:17:04,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-12-20 00:17:04,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-12-20 00:17:04,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-12-20 00:17:04,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#9 [2023-12-20 00:17:04,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#10 [2023-12-20 00:17:04,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#11 [2023-12-20 00:17:04,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#12 [2023-12-20 00:17:04,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-20 00:17:04,992 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-20 00:17:04,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 00:17:05,178 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 00:17:05,182 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 00:17:05,442 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 00:17:05,465 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 00:17:05,466 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-20 00:17:05,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 12:17:05 BoogieIcfgContainer [2023-12-20 00:17:05,466 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 00:17:05,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 00:17:05,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 00:17:05,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 00:17:05,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 12:17:04" (1/3) ... [2023-12-20 00:17:05,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfc78f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 12:17:05, skipping insertion in model container [2023-12-20 00:17:05,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:17:04" (2/3) ... [2023-12-20 00:17:05,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfc78f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 12:17:05, skipping insertion in model container [2023-12-20 00:17:05,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 12:17:05" (3/3) ... [2023-12-20 00:17:05,471 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd2-ll.c [2023-12-20 00:17:05,482 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 00:17:05,482 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 00:17:05,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 00:17:05,514 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@24fb00f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 00:17:05,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 00:17:05,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-20 00:17:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 00:17:05,533 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:17:05,533 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:17:05,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:17:05,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:17:05,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1748206812, now seen corresponding path program 1 times [2023-12-20 00:17:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:17:05,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051543572] [2023-12-20 00:17:05,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:17:05,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:17:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:17:05,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:17:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051543572] [2023-12-20 00:17:05,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 00:17:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433942403] [2023-12-20 00:17:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:17:05,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:17:05,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:17:05,727 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) [2023-12-20 00:17:05,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 00:17:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:17:05,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-20 00:17:05,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:17:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 00:17:05,963 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:17:05,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433942403] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:17:05,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:17:05,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 00:17:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853867130] [2023-12-20 00:17:05,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:17:05,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 00:17:05,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:17:05,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 00:17:05,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 00:17:05,991 INFO L87 Difference]: Start difference. First operand has 48 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 00:17:06,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:17:06,037 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2023-12-20 00:17:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 00:17:06,039 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-12-20 00:17:06,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:17:06,044 INFO L225 Difference]: With dead ends: 94 [2023-12-20 00:17:06,044 INFO L226 Difference]: Without dead ends: 46 [2023-12-20 00:17:06,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 00:17:06,048 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 00:17:06,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 00:17:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-20 00:17:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-12-20 00:17:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 30 states have internal predecessors, (30), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-20 00:17:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2023-12-20 00:17:06,072 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 36 [2023-12-20 00:17:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:17:06,072 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2023-12-20 00:17:06,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 00:17:06,073 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2023-12-20 00:17:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 00:17:06,074 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:17:06,074 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:17:06,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 00:17:06,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-20 00:17:06,279 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:17:06,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:17:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash -754527188, now seen corresponding path program 1 times [2023-12-20 00:17:06,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:17:06,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533474125] [2023-12-20 00:17:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:17:06,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:17:06,340 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:17:06,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702500251] [2023-12-20 00:17:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:17:06,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:17:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:17:06,346 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) [2023-12-20 00:17:06,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 00:17:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:17:06,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 93 conjunts are in the unsatisfiable core [2023-12-20 00:17:06,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:17:06,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:17:06,599 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 11 [2023-12-20 00:17:06,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:17:06,607 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 [2023-12-20 00:17:06,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:17:06,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:17:06,924 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 [2023-12-20 00:17:06,930 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 [2023-12-20 00:17:06,932 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 [2023-12-20 00:17:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 00:17:06,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:17:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-20 00:17:07,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:17:07,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533474125] [2023-12-20 00:17:07,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:17:07,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702500251] [2023-12-20 00:17:07,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702500251] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 00:17:07,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:17:07,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2023-12-20 00:17:07,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025462551] [2023-12-20 00:17:07,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:17:07,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 00:17:07,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:17:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 00:17:07,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2023-12-20 00:17:07,187 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-20 00:17:15,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:17:46,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:17:50,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:17:52,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:17:56,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:00,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:04,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:08,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:13,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:17,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:20,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:24,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:28,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:32,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:36,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:40,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:44,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:48,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:52,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:56,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:18:59,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.97s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:03,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:08,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:11,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:15,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:20,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:23,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:27,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:31,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:36,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:40,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-20 00:19:40,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:19:40,946 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2023-12-20 00:19:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 00:19:40,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2023-12-20 00:19:40,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:19:40,948 INFO L225 Difference]: With dead ends: 66 [2023-12-20 00:19:40,948 INFO L226 Difference]: Without dead ends: 64 [2023-12-20 00:19:40,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=77, Invalid=617, Unknown=8, NotChecked=0, Total=702 [2023-12-20 00:19:40,949 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 19 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 11 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.6s IncrementalHoareTripleChecker+Time [2023-12-20 00:19:40,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 308 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 98 Invalid, 34 Unknown, 0 Unchecked, 121.6s Time] [2023-12-20 00:19:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-20 00:19:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-12-20 00:19:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2023-12-20 00:19:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2023-12-20 00:19:40,960 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 36 [2023-12-20 00:19:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:19:40,960 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2023-12-20 00:19:40,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-20 00:19:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2023-12-20 00:19:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 00:19:40,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:19:40,962 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:19:40,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 00:19:41,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-20 00:19:41,163 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:19:41,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:19:41,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1375000559, now seen corresponding path program 1 times [2023-12-20 00:19:41,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:19:41,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559522177] [2023-12-20 00:19:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:19:41,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:19:41,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:19:41,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250701435] [2023-12-20 00:19:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:19:41,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:19:41,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:19:41,197 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) [2023-12-20 00:19:41,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 00:19:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:19:41,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-20 00:19:41,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:19:41,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:19:41,393 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 [2023-12-20 00:19:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 00:19:41,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:19:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-20 00:19:41,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:19:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559522177] [2023-12-20 00:19:41,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:19:41,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250701435] [2023-12-20 00:19:41,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250701435] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:19:41,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:19:41,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-12-20 00:19:41,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601552292] [2023-12-20 00:19:41,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 00:19:41,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-20 00:19:41,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:19:41,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-20 00:19:41,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-12-20 00:19:41,761 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 7 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-20 00:19:45,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 00:19:50,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:19:54,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 00:19:58,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 00:20:02,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:20:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:20:02,805 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2023-12-20 00:20:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 00:20:02,805 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 7 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 36 [2023-12-20 00:20:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:20:02,807 INFO L225 Difference]: With dead ends: 123 [2023-12-20 00:20:02,807 INFO L226 Difference]: Without dead ends: 111 [2023-12-20 00:20:02,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 00:20:02,809 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 40 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2023-12-20 00:20:02,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 95 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 622 Invalid, 6 Unknown, 0 Unchecked, 20.8s Time] [2023-12-20 00:20:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-20 00:20:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2023-12-20 00:20:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 71 states have internal predecessors, (74), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30) [2023-12-20 00:20:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2023-12-20 00:20:02,822 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 36 [2023-12-20 00:20:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:20:02,822 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2023-12-20 00:20:02,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 7 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-20 00:20:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2023-12-20 00:20:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-20 00:20:02,823 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:20:02,823 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:20:02,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 00:20:03,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:03,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:20:03,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:20:03,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1363352137, now seen corresponding path program 1 times [2023-12-20 00:20:03,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:20:03,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081629053] [2023-12-20 00:20:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:20:03,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:20:03,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925202595] [2023-12-20 00:20:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:03,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:03,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:20:03,059 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) [2023-12-20 00:20:03,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 00:20:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:20:03,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 142 conjunts are in the unsatisfiable core [2023-12-20 00:20:03,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:20:03,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:03,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:03,339 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 11 treesize of output 7 [2023-12-20 00:20:03,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:20:03,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:20:04,066 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 [2023-12-20 00:20:04,073 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 [2023-12-20 00:20:04,075 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 [2023-12-20 00:20:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 00:20:04,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:20:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-20 00:20:04,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:20:04,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081629053] [2023-12-20 00:20:04,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:20:04,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925202595] [2023-12-20 00:20:04,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925202595] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 00:20:04,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:20:04,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [18] total 26 [2023-12-20 00:20:04,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494508228] [2023-12-20 00:20:04,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:20:04,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 00:20:04,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:20:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 00:20:04,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2023-12-20 00:20:04,461 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-20 00:20:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:20:05,555 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2023-12-20 00:20:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 00:20:05,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2023-12-20 00:20:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:20:05,556 INFO L225 Difference]: With dead ends: 115 [2023-12-20 00:20:05,556 INFO L226 Difference]: Without dead ends: 113 [2023-12-20 00:20:05,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2023-12-20 00:20:05,557 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 23 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 00:20:05,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 313 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 00:20:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-20 00:20:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2023-12-20 00:20:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 28 states have call successors, (28), 13 states have call predecessors, (28), 13 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30) [2023-12-20 00:20:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2023-12-20 00:20:05,576 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 42 [2023-12-20 00:20:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:20:05,576 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2023-12-20 00:20:05,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-20 00:20:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2023-12-20 00:20:05,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-20 00:20:05,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:20:05,577 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1] [2023-12-20 00:20:05,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 00:20:05,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:05,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:20:05,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:20:05,783 INFO L85 PathProgramCache]: Analyzing trace with hash 676224932, now seen corresponding path program 1 times [2023-12-20 00:20:05,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:20:05,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410937752] [2023-12-20 00:20:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:05,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:20:05,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:20:05,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372129752] [2023-12-20 00:20:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:05,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:20:05,805 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) [2023-12-20 00:20:05,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 00:20:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:20:05,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 137 conjunts are in the unsatisfiable core [2023-12-20 00:20:06,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:20:06,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:06,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:06,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:20:06,063 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 11 treesize of output 7 [2023-12-20 00:20:06,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:20:06,671 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 [2023-12-20 00:20:06,673 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 [2023-12-20 00:20:06,680 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 [2023-12-20 00:20:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-20 00:20:06,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:20:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 00:20:07,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:20:07,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410937752] [2023-12-20 00:20:07,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:20:07,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372129752] [2023-12-20 00:20:07,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372129752] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-20 00:20:07,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:20:07,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2023-12-20 00:20:07,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418071214] [2023-12-20 00:20:07,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:20:07,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 00:20:07,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:20:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 00:20:07,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2023-12-20 00:20:07,042 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-20 00:20:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:20:07,982 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2023-12-20 00:20:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 00:20:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2023-12-20 00:20:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:20:07,983 INFO L225 Difference]: With dead ends: 119 [2023-12-20 00:20:07,983 INFO L226 Difference]: Without dead ends: 117 [2023-12-20 00:20:07,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-12-20 00:20:07,984 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 22 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 00:20:07,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 295 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 00:20:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-20 00:20:08,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2023-12-20 00:20:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 73 states have (on average 1.095890410958904) internal successors, (80), 77 states have internal predecessors, (80), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30) [2023-12-20 00:20:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2023-12-20 00:20:08,014 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 48 [2023-12-20 00:20:08,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:20:08,014 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2023-12-20 00:20:08,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-20 00:20:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2023-12-20 00:20:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 00:20:08,018 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:20:08,018 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:20:08,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 00:20:08,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:08,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:20:08,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:20:08,230 INFO L85 PathProgramCache]: Analyzing trace with hash 711966141, now seen corresponding path program 1 times [2023-12-20 00:20:08,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:20:08,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716464020] [2023-12-20 00:20:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:08,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:20:08,277 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:20:08,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395412132] [2023-12-20 00:20:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:08,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:08,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:20:08,286 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) [2023-12-20 00:20:08,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 00:20:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:20:08,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 169 conjunts are in the unsatisfiable core [2023-12-20 00:20:08,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:20:08,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:08,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:08,565 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 21 treesize of output 17 [2023-12-20 00:20:08,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:20:08,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:20:08,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:20:09,673 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 26 treesize of output 14 [2023-12-20 00:20:09,677 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 25 treesize of output 17 [2023-12-20 00:20:09,680 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 35 treesize of output 15 [2023-12-20 00:20:09,692 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 [2023-12-20 00:20:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 00:20:09,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:20:09,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:20:09,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716464020] [2023-12-20 00:20:09,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:20:09,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395412132] [2023-12-20 00:20:09,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395412132] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:20:09,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:20:09,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-20 00:20:09,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914980983] [2023-12-20 00:20:09,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:20:09,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 00:20:09,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:20:09,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 00:20:09,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-12-20 00:20:09,853 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 00:20:10,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:20:10,869 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2023-12-20 00:20:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 00:20:10,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2023-12-20 00:20:10,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:20:10,871 INFO L225 Difference]: With dead ends: 125 [2023-12-20 00:20:10,871 INFO L226 Difference]: Without dead ends: 123 [2023-12-20 00:20:10,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-12-20 00:20:10,871 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 29 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 00:20:10,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 347 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 00:20:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-20 00:20:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2023-12-20 00:20:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 28 states have call successors, (28), 15 states have call predecessors, (28), 15 states have return successors, (30), 26 states have call predecessors, (30), 27 states have call successors, (30) [2023-12-20 00:20:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2023-12-20 00:20:10,888 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 54 [2023-12-20 00:20:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:20:10,889 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2023-12-20 00:20:10,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-20 00:20:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2023-12-20 00:20:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-20 00:20:10,889 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:20:10,889 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:20:10,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 00:20:11,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:11,098 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:20:11,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:20:11,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1336898608, now seen corresponding path program 1 times [2023-12-20 00:20:11,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:20:11,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882469954] [2023-12-20 00:20:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:11,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:20:11,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:20:11,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262839485] [2023-12-20 00:20:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:11,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:11,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:20:11,123 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) [2023-12-20 00:20:11,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 00:20:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:20:11,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 135 conjunts are in the unsatisfiable core [2023-12-20 00:20:11,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:20:11,374 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 11 [2023-12-20 00:20:11,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:11,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:11,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:20:11,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:20:11,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2023-12-20 00:20:11,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:20:11,861 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 25 treesize of output 17 [2023-12-20 00:20:11,864 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 [2023-12-20 00:20:11,868 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 [2023-12-20 00:20:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-20 00:20:11,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:20:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-20 00:20:12,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:20:12,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882469954] [2023-12-20 00:20:12,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:20:12,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262839485] [2023-12-20 00:20:12,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262839485] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:20:12,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:20:12,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2023-12-20 00:20:12,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932386569] [2023-12-20 00:20:12,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 00:20:12,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-20 00:20:12,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:20:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-20 00:20:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-12-20 00:20:12,127 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 16 states have internal predecessors, (50), 9 states have call successors, (24), 8 states have call predecessors, (24), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-20 00:20:13,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:20:13,172 INFO L93 Difference]: Finished difference Result 185 states and 215 transitions. [2023-12-20 00:20:13,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 00:20:13,173 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 16 states have internal predecessors, (50), 9 states have call successors, (24), 8 states have call predecessors, (24), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 64 [2023-12-20 00:20:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:20:13,174 INFO L225 Difference]: With dead ends: 185 [2023-12-20 00:20:13,174 INFO L226 Difference]: Without dead ends: 183 [2023-12-20 00:20:13,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2023-12-20 00:20:13,175 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 85 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 00:20:13,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 486 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 00:20:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-12-20 00:20:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2023-12-20 00:20:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 111 states have (on average 1.0810810810810811) internal successors, (120), 117 states have internal predecessors, (120), 38 states have call successors, (38), 22 states have call predecessors, (38), 26 states have return successors, (48), 38 states have call predecessors, (48), 37 states have call successors, (48) [2023-12-20 00:20:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 206 transitions. [2023-12-20 00:20:13,206 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 206 transitions. Word has length 64 [2023-12-20 00:20:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:20:13,206 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 206 transitions. [2023-12-20 00:20:13,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 16 states have internal predecessors, (50), 9 states have call successors, (24), 8 states have call predecessors, (24), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-20 00:20:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 206 transitions. [2023-12-20 00:20:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-20 00:20:13,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:20:13,208 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:20:13,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-20 00:20:13,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:13,415 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:20:13,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:20:13,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1343293503, now seen corresponding path program 1 times [2023-12-20 00:20:13,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:20:13,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450146010] [2023-12-20 00:20:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:13,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:20:13,469 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:20:13,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326157818] [2023-12-20 00:20:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:13,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:20:13,480 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) [2023-12-20 00:20:13,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 00:20:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:20:13,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-20 00:20:13,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:20:13,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:20:13,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-20 00:20:13,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:17,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:20:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-20 00:20:18,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:20:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-20 00:20:18,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:20:18,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450146010] [2023-12-20 00:20:18,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:20:18,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326157818] [2023-12-20 00:20:18,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326157818] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:20:18,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:20:18,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2023-12-20 00:20:18,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495175370] [2023-12-20 00:20:18,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 00:20:18,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-20 00:20:18,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:20:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-20 00:20:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=951, Unknown=1, NotChecked=0, Total=1056 [2023-12-20 00:20:18,697 INFO L87 Difference]: Start difference. First operand 176 states and 206 transitions. Second operand has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 13 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2023-12-20 00:20:22,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 00:20:24,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:20:24,353 INFO L93 Difference]: Finished difference Result 210 states and 252 transitions. [2023-12-20 00:20:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 00:20:24,354 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 13 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) Word has length 73 [2023-12-20 00:20:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:20:24,355 INFO L225 Difference]: With dead ends: 210 [2023-12-20 00:20:24,355 INFO L226 Difference]: Without dead ends: 194 [2023-12-20 00:20:24,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=460, Invalid=2961, Unknown=1, NotChecked=0, Total=3422 [2023-12-20 00:20:24,357 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 144 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 167 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-20 00:20:24,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 85 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 781 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2023-12-20 00:20:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-20 00:20:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2023-12-20 00:20:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 123 states have internal predecessors, (126), 39 states have call successors, (39), 23 states have call predecessors, (39), 29 states have return successors, (51), 39 states have call predecessors, (51), 38 states have call successors, (51) [2023-12-20 00:20:24,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 216 transitions. [2023-12-20 00:20:24,383 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 216 transitions. Word has length 73 [2023-12-20 00:20:24,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:20:24,383 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 216 transitions. [2023-12-20 00:20:24,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 13 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 10 states have call predecessors, (22), 12 states have call successors, (22) [2023-12-20 00:20:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 216 transitions. [2023-12-20 00:20:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-20 00:20:24,385 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:20:24,385 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:20:24,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 00:20:24,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-20 00:20:24,590 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:20:24,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:20:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1742802459, now seen corresponding path program 1 times [2023-12-20 00:20:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:20:24,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551700480] [2023-12-20 00:20:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:20:24,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:20:24,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707733955] [2023-12-20 00:20:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:20:24,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:20:24,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:20:24,616 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) [2023-12-20 00:20:24,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 00:20:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:20:24,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 341 conjunts are in the unsatisfiable core [2023-12-20 00:20:24,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:20:24,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:24,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:20:24,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:20:24,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:20:25,000 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 21 treesize of output 17 [2023-12-20 00:20:25,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:20:25,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:20:25,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:20:25,613 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 [2023-12-20 00:20:43,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:20:43,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 89 [2023-12-20 00:20:43,880 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 27 treesize of output 19 [2023-12-20 00:20:43,922 INFO L349 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2023-12-20 00:20:43,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 82 [2023-12-20 00:20:43,962 INFO L349 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2023-12-20 00:20:43,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 78 [2023-12-20 00:20:44,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:20:44,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:20:44,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:20:44,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 174 [2023-12-20 00:20:48,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:20:48,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 110 treesize of output 226 [2023-12-20 00:20:48,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:20:48,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 129 [2023-12-20 00:20:48,527 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 63 treesize of output 39 [2023-12-20 00:20:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-20 00:20:48,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:20:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:20:51,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551700480] [2023-12-20 00:20:51,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:20:51,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707733955] [2023-12-20 00:20:51,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707733955] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:20:51,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:20:51,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-12-20 00:20:51,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930896750] [2023-12-20 00:20:51,784 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:20:51,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 00:20:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:20:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 00:20:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1352, Unknown=3, NotChecked=0, Total=1482 [2023-12-20 00:20:51,785 INFO L87 Difference]: Start difference. First operand 186 states and 216 transitions. Second operand has 29 states, 25 states have (on average 1.64) internal successors, (41), 20 states have internal predecessors, (41), 10 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-20 00:20:59,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:21:00,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:21:16,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:21:20,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:21:34,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:21:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:21:50,993 INFO L93 Difference]: Finished difference Result 301 states and 357 transitions. [2023-12-20 00:21:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-20 00:21:50,994 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.64) internal successors, (41), 20 states have internal predecessors, (41), 10 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 77 [2023-12-20 00:21:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:21:50,997 INFO L225 Difference]: With dead ends: 301 [2023-12-20 00:21:50,997 INFO L226 Difference]: Without dead ends: 297 [2023-12-20 00:21:50,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=312, Invalid=3339, Unknown=9, NotChecked=0, Total=3660 [2023-12-20 00:21:51,001 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 121 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 60 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:21:51,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 332 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1089 Invalid, 4 Unknown, 0 Unchecked, 30.2s Time] [2023-12-20 00:21:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-12-20 00:21:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 289. [2023-12-20 00:21:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 180 states have (on average 1.0888888888888888) internal successors, (196), 190 states have internal predecessors, (196), 64 states have call successors, (64), 34 states have call predecessors, (64), 44 states have return successors, (86), 64 states have call predecessors, (86), 62 states have call successors, (86) [2023-12-20 00:21:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 346 transitions. [2023-12-20 00:21:51,084 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 346 transitions. Word has length 77 [2023-12-20 00:21:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:21:51,084 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 346 transitions. [2023-12-20 00:21:51,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.64) internal successors, (41), 20 states have internal predecessors, (41), 10 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-20 00:21:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 346 transitions. [2023-12-20 00:21:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-20 00:21:51,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:21:51,085 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:21:51,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-20 00:21:51,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:21:51,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:21:51,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:21:51,293 INFO L85 PathProgramCache]: Analyzing trace with hash 71740918, now seen corresponding path program 2 times [2023-12-20 00:21:51,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:21:51,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934487241] [2023-12-20 00:21:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:21:51,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:21:51,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:21:51,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691511283] [2023-12-20 00:21:51,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 00:21:51,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:21:51,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:21:51,322 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) [2023-12-20 00:21:51,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 00:21:51,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 00:21:51,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:21:51,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 243 conjunts are in the unsatisfiable core [2023-12-20 00:21:51,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:21:51,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:21:51,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:21:51,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:21:51,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:21:51,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:21:51,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:21:51,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:21:52,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:21:52,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:21:52,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-20 00:21:52,217 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 [2023-12-20 00:22:04,603 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 27 treesize of output 19 [2023-12-20 00:22:04,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:22:04,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:22:04,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:22:05,053 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 [2023-12-20 00:22:05,057 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 [2023-12-20 00:22:05,059 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 [2023-12-20 00:22:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-20 00:22:05,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:22:10,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:22:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934487241] [2023-12-20 00:22:10,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:22:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691511283] [2023-12-20 00:22:10,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691511283] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:22:10,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:22:10,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-20 00:22:10,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450960018] [2023-12-20 00:22:10,827 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:22:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-20 00:22:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:22:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-20 00:22:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=780, Unknown=4, NotChecked=0, Total=870 [2023-12-20 00:22:10,828 INFO L87 Difference]: Start difference. First operand 289 states and 346 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (15), 9 states have call predecessors, (15), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-20 00:22:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:22:42,755 INFO L93 Difference]: Finished difference Result 350 states and 412 transitions. [2023-12-20 00:22:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 00:22:42,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (15), 9 states have call predecessors, (15), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 83 [2023-12-20 00:22:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:22:42,758 INFO L225 Difference]: With dead ends: 350 [2023-12-20 00:22:42,758 INFO L226 Difference]: Without dead ends: 348 [2023-12-20 00:22:42,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=182, Invalid=1533, Unknown=7, NotChecked=0, Total=1722 [2023-12-20 00:22:42,759 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2023-12-20 00:22:42,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 438 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2023-12-20 00:22:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-12-20 00:22:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 274. [2023-12-20 00:22:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 174 states have (on average 1.0862068965517242) internal successors, (189), 182 states have internal predecessors, (189), 56 states have call successors, (56), 35 states have call predecessors, (56), 43 states have return successors, (73), 56 states have call predecessors, (73), 55 states have call successors, (73) [2023-12-20 00:22:42,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 318 transitions. [2023-12-20 00:22:42,831 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 318 transitions. Word has length 83 [2023-12-20 00:22:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:22:42,832 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 318 transitions. [2023-12-20 00:22:42,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 8 states have call successors, (15), 9 states have call predecessors, (15), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-20 00:22:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 318 transitions. [2023-12-20 00:22:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-20 00:22:42,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:22:42,832 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2023-12-20 00:22:42,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 00:22:43,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 00:22:43,040 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:22:43,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:22:43,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1144293007, now seen corresponding path program 3 times [2023-12-20 00:22:43,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:22:43,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126185482] [2023-12-20 00:22:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:22:43,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:22:43,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:22:43,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349704556] [2023-12-20 00:22:43,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 00:22:43,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:22:43,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:22:43,064 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) [2023-12-20 00:22:43,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 00:22:43,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 00:22:43,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:22:43,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 361 conjunts are in the unsatisfiable core [2023-12-20 00:22:43,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:22:43,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:22:43,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:22:45,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:22:45,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:22:45,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:22:46,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:22:46,173 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 21 treesize of output 17 [2023-12-20 00:22:46,260 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 21 treesize of output 17 [2023-12-20 00:22:46,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:22:46,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:22:56,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:22:56,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-20 00:22:56,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:22:57,304 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 [2023-12-20 00:23:14,088 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-20 00:23:14,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2023-12-20 00:23:14,804 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2023-12-20 00:23:14,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 54 [2023-12-20 00:23:14,835 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 36 treesize of output 24 [2023-12-20 00:23:16,039 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-20 00:23:16,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2023-12-20 00:24:00,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:24:00,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 155 [2023-12-20 00:24:00,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:24:00,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 136 [2023-12-20 00:24:01,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:24:01,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 120 [2023-12-20 00:24:01,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:24:01,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 109 [2023-12-20 00:24:01,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:24:01,679 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 65 treesize of output 57 [2023-12-20 00:24:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 23 proven. 81 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-20 00:24:04,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:24:12,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:24:12,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126185482] [2023-12-20 00:24:12,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:24:12,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349704556] [2023-12-20 00:24:12,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349704556] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:24:12,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:24:12,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-12-20 00:24:12,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600484452] [2023-12-20 00:24:12,041 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:24:12,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-20 00:24:12,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:24:12,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-20 00:24:12,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1193, Unknown=2, NotChecked=0, Total=1332 [2023-12-20 00:24:12,042 INFO L87 Difference]: Start difference. First operand 274 states and 318 transitions. Second operand has 32 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 9 states have call successors, (16), 10 states have call predecessors, (16), 8 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-20 00:24:16,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 00:25:10,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:25:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:25:27,945 INFO L93 Difference]: Finished difference Result 284 states and 326 transitions. [2023-12-20 00:25:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-20 00:25:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 9 states have call successors, (16), 10 states have call predecessors, (16), 8 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 89 [2023-12-20 00:25:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:25:27,947 INFO L225 Difference]: With dead ends: 284 [2023-12-20 00:25:27,947 INFO L226 Difference]: Without dead ends: 282 [2023-12-20 00:25:27,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 86.8s TimeCoverageRelationStatistics Valid=333, Invalid=3203, Unknown=4, NotChecked=0, Total=3540 [2023-12-20 00:25:27,948 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 110 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.5s IncrementalHoareTripleChecker+Time [2023-12-20 00:25:27,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 379 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1427 Invalid, 1 Unknown, 0 Unchecked, 35.5s Time] [2023-12-20 00:25:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-12-20 00:25:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 278. [2023-12-20 00:25:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 177 states have (on average 1.07909604519774) internal successors, (191), 185 states have internal predecessors, (191), 56 states have call successors, (56), 36 states have call predecessors, (56), 44 states have return successors, (73), 56 states have call predecessors, (73), 55 states have call successors, (73) [2023-12-20 00:25:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 320 transitions. [2023-12-20 00:25:28,049 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 320 transitions. Word has length 89 [2023-12-20 00:25:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:25:28,050 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 320 transitions. [2023-12-20 00:25:28,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 9 states have call successors, (16), 10 states have call predecessors, (16), 8 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-20 00:25:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 320 transitions. [2023-12-20 00:25:28,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-20 00:25:28,050 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:25:28,051 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1] [2023-12-20 00:25:28,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 00:25:28,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-20 00:25:28,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:25:28,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:25:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1528400927, now seen corresponding path program 1 times [2023-12-20 00:25:28,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:25:28,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537363376] [2023-12-20 00:25:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:25:28,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:25:28,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:25:28,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26729176] [2023-12-20 00:25:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:25:28,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:25:28,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:25:28,284 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) [2023-12-20 00:25:28,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 00:25:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:25:28,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 230 conjunts are in the unsatisfiable core [2023-12-20 00:25:28,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:25:28,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:25:28,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:25:29,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:25:29,893 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 11 [2023-12-20 00:25:29,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:25:29,956 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 11 [2023-12-20 00:25:29,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:25:29,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:25:30,025 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 [2023-12-20 00:25:36,329 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_45_to_53_0_~p.offset_BEFORE_CALL_6 Int) (v_func_to_recursive_line_45_to_53_0_~x.base_BEFORE_CALL_17 Int) (v_func_to_recursive_line_45_to_53_0_~r.base_BEFORE_CALL_6 Int) (v_func_to_recursive_line_45_to_53_0_~a.offset_BEFORE_CALL_15 Int) (v_func_to_recursive_line_45_to_53_0_~y.base_BEFORE_CALL_24 Int) (v_func_to_recursive_line_45_to_53_0_~a.base_BEFORE_CALL_15 Int) (v_func_to_recursive_line_45_to_53_0_~p.base_BEFORE_CALL_6 Int) (v_func_to_recursive_line_45_to_53_0_~r.offset_BEFORE_CALL_6 Int)) (= (select (select |c_#memory_int#5| v_func_to_recursive_line_45_to_53_0_~a.base_BEFORE_CALL_15) v_func_to_recursive_line_45_to_53_0_~a.offset_BEFORE_CALL_15) (+ (* (select (select |c_#memory_int#10| v_func_to_recursive_line_45_to_53_0_~p.base_BEFORE_CALL_6) v_func_to_recursive_line_45_to_53_0_~p.offset_BEFORE_CALL_6) (select (select |c_#memory_int#2| v_func_to_recursive_line_45_to_53_0_~x.base_BEFORE_CALL_17) 0)) (* (select (select |c_#memory_int#1| v_func_to_recursive_line_45_to_53_0_~y.base_BEFORE_CALL_24) 0) (select (select |c_#memory_int#12| v_func_to_recursive_line_45_to_53_0_~r.base_BEFORE_CALL_6) v_func_to_recursive_line_45_to_53_0_~r.offset_BEFORE_CALL_6))))) is different from true [2023-12-20 00:25:40,830 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_45_to_53_0_~r.base_BEFORE_CALL_7 Int) (v_func_to_recursive_line_45_to_53_0_~a.offset_BEFORE_CALL_16 Int) (v_func_to_recursive_line_45_to_53_0_~y.base_BEFORE_CALL_25 Int) (v_func_to_recursive_line_45_to_53_0_~r.offset_BEFORE_CALL_7 Int) (v_func_to_recursive_line_45_to_53_0_~x.base_BEFORE_CALL_18 Int) (v_func_to_recursive_line_45_to_53_0_~p.base_BEFORE_CALL_7 Int) (v_func_to_recursive_line_45_to_53_0_~a.base_BEFORE_CALL_16 Int) (v_func_to_recursive_line_45_to_53_0_~p.offset_BEFORE_CALL_7 Int)) (= (select (select |c_#memory_int#5| v_func_to_recursive_line_45_to_53_0_~a.base_BEFORE_CALL_16) v_func_to_recursive_line_45_to_53_0_~a.offset_BEFORE_CALL_16) (+ (* (select (select |c_#memory_int#12| v_func_to_recursive_line_45_to_53_0_~r.base_BEFORE_CALL_7) v_func_to_recursive_line_45_to_53_0_~r.offset_BEFORE_CALL_7) (select (select |c_#memory_int#1| v_func_to_recursive_line_45_to_53_0_~y.base_BEFORE_CALL_25) 0)) (* (select (select |c_#memory_int#10| v_func_to_recursive_line_45_to_53_0_~p.base_BEFORE_CALL_7) v_func_to_recursive_line_45_to_53_0_~p.offset_BEFORE_CALL_7) (select (select |c_#memory_int#2| v_func_to_recursive_line_45_to_53_0_~x.base_BEFORE_CALL_18) 0))))) is different from true [2023-12-20 00:25:45,956 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_45_to_53_0_~r.base_BEFORE_CALL_9 Int) (v_func_to_recursive_line_45_to_53_0_~r.offset_BEFORE_CALL_9 Int) (v_func_to_recursive_line_45_to_53_0_~p.base_BEFORE_CALL_9 Int) (v_func_to_recursive_line_45_to_53_0_~a.base_BEFORE_CALL_18 Int) (v_func_to_recursive_line_45_to_53_0_~a.offset_BEFORE_CALL_18 Int) (v_func_to_recursive_line_45_to_53_0_~y.base_BEFORE_CALL_27 Int) (v_func_to_recursive_line_45_to_53_0_~x.base_BEFORE_CALL_20 Int) (v_func_to_recursive_line_45_to_53_0_~p.offset_BEFORE_CALL_9 Int)) (= (+ (* (select (select |c_#memory_int#2| v_func_to_recursive_line_45_to_53_0_~x.base_BEFORE_CALL_20) 0) (select (select |c_#memory_int#10| v_func_to_recursive_line_45_to_53_0_~p.base_BEFORE_CALL_9) v_func_to_recursive_line_45_to_53_0_~p.offset_BEFORE_CALL_9)) (* (select (select |c_#memory_int#1| v_func_to_recursive_line_45_to_53_0_~y.base_BEFORE_CALL_27) 0) (select (select |c_#memory_int#12| v_func_to_recursive_line_45_to_53_0_~r.base_BEFORE_CALL_9) v_func_to_recursive_line_45_to_53_0_~r.offset_BEFORE_CALL_9))) (select (select |c_#memory_int#5| v_func_to_recursive_line_45_to_53_0_~a.base_BEFORE_CALL_18) v_func_to_recursive_line_45_to_53_0_~a.offset_BEFORE_CALL_18))) is different from true [2023-12-20 00:25:55,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2023-12-20 00:25:55,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-12-20 00:25:55,095 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 29 treesize of output 21 [2023-12-20 00:25:55,118 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 25 treesize of output 17 [2023-12-20 00:25:55,140 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 [2023-12-20 00:26:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 112 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 23 not checked. [2023-12-20 00:26:00,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:26:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 48 proven. 11 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-12-20 00:26:03,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:26:03,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537363376] [2023-12-20 00:26:03,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:26:03,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26729176] [2023-12-20 00:26:03,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26729176] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:26:03,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:26:03,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 28 [2023-12-20 00:26:03,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180224545] [2023-12-20 00:26:03,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 00:26:03,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 00:26:03,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:26:03,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 00:26:03,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=530, Unknown=6, NotChecked=144, Total=756 [2023-12-20 00:26:03,729 INFO L87 Difference]: Start difference. First operand 278 states and 320 transitions. Second operand has 28 states, 25 states have (on average 2.92) internal successors, (73), 21 states have internal predecessors, (73), 10 states have call successors, (32), 11 states have call predecessors, (32), 6 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) [2023-12-20 00:26:09,965 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] [2023-12-20 00:26:14,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:26:18,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:26:30,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:26:34,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:26:38,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:26:39,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:26:51,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:27:04,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:27:08,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:27:13,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:27:13,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:27:13,977 INFO L93 Difference]: Finished difference Result 300 states and 338 transitions. [2023-12-20 00:27:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 00:27:13,978 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.92) internal successors, (73), 21 states have internal predecessors, (73), 10 states have call successors, (32), 11 states have call predecessors, (32), 6 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) Word has length 105 [2023-12-20 00:27:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:27:13,979 INFO L225 Difference]: With dead ends: 300 [2023-12-20 00:27:13,979 INFO L226 Difference]: Without dead ends: 298 [2023-12-20 00:27:13,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 182 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=178, Invalid=1085, Unknown=9, NotChecked=210, Total=1482 [2023-12-20 00:27:13,980 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 67 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 30 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 46.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:27:13,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 625 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 659 Invalid, 8 Unknown, 311 Unchecked, 46.2s Time] [2023-12-20 00:27:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-12-20 00:27:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 286. [2023-12-20 00:27:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 184 states have (on average 1.0815217391304348) internal successors, (199), 192 states have internal predecessors, (199), 56 states have call successors, (56), 39 states have call predecessors, (56), 45 states have return successors, (67), 54 states have call predecessors, (67), 55 states have call successors, (67) [2023-12-20 00:27:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 322 transitions. [2023-12-20 00:27:14,088 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 322 transitions. Word has length 105 [2023-12-20 00:27:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:27:14,089 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 322 transitions. [2023-12-20 00:27:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.92) internal successors, (73), 21 states have internal predecessors, (73), 10 states have call successors, (32), 11 states have call predecessors, (32), 6 states have return successors, (23), 6 states have call predecessors, (23), 8 states have call successors, (23) [2023-12-20 00:27:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 322 transitions. [2023-12-20 00:27:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-20 00:27:14,089 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:27:14,090 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:27:14,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 00:27:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-20 00:27:14,296 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:27:14,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:27:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -914886710, now seen corresponding path program 1 times [2023-12-20 00:27:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:27:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414645791] [2023-12-20 00:27:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:27:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:27:14,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:27:14,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365842785] [2023-12-20 00:27:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:27:14,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:27:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:27:14,328 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) [2023-12-20 00:27:14,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 00:27:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:27:14,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 201 conjunts are in the unsatisfiable core [2023-12-20 00:27:14,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:27:14,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:27:15,419 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 [2023-12-20 00:27:15,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:27:15,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:27:15,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:27:15,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:27:15,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:27:19,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:27:19,062 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 [2023-12-20 00:27:20,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:27:21,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:27:26,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:27:26,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2023-12-20 00:27:27,135 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 33 treesize of output 25 [2023-12-20 00:27:30,345 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 13 [2023-12-20 00:27:30,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 00:27:30,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-20 00:27:30,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-20 00:27:31,029 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 [2023-12-20 00:27:31,052 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 [2023-12-20 00:27:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 49 proven. 21 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-20 00:27:32,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:27:45,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:27:45,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414645791] [2023-12-20 00:27:45,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:27:45,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365842785] [2023-12-20 00:27:45,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365842785] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:27:45,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:27:45,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-20 00:27:45,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547625727] [2023-12-20 00:27:45,531 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:27:45,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 00:27:45,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:27:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 00:27:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2023-12-20 00:27:45,532 INFO L87 Difference]: Start difference. First operand 286 states and 322 transitions. Second operand has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-20 00:28:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:28:17,397 INFO L93 Difference]: Finished difference Result 316 states and 364 transitions. [2023-12-20 00:28:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-20 00:28:17,398 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 103 [2023-12-20 00:28:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:28:17,399 INFO L225 Difference]: With dead ends: 316 [2023-12-20 00:28:17,399 INFO L226 Difference]: Without dead ends: 314 [2023-12-20 00:28:17,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=319, Invalid=2873, Unknown=0, NotChecked=0, Total=3192 [2023-12-20 00:28:17,400 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 129 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 121 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-12-20 00:28:17,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 145 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1086 Invalid, 1 Unknown, 0 Unchecked, 14.5s Time] [2023-12-20 00:28:17,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-12-20 00:28:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 306. [2023-12-20 00:28:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 195 states have (on average 1.0769230769230769) internal successors, (210), 203 states have internal predecessors, (210), 59 states have call successors, (59), 40 states have call predecessors, (59), 51 states have return successors, (82), 62 states have call predecessors, (82), 58 states have call successors, (82) [2023-12-20 00:28:17,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 351 transitions. [2023-12-20 00:28:17,526 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 351 transitions. Word has length 103 [2023-12-20 00:28:17,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:28:17,526 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 351 transitions. [2023-12-20 00:28:17,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (17), 6 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-20 00:28:17,526 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 351 transitions. [2023-12-20 00:28:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-20 00:28:17,527 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:28:17,527 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1] [2023-12-20 00:28:17,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 00:28:17,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 00:28:17,730 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:28:17,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:28:17,730 INFO L85 PathProgramCache]: Analyzing trace with hash 615307684, now seen corresponding path program 1 times [2023-12-20 00:28:17,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:28:17,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153941596] [2023-12-20 00:28:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:28:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:28:17,756 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:28:17,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675241803] [2023-12-20 00:28:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:28:17,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:28:17,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:28:17,758 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) [2023-12-20 00:28:17,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 00:28:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:28:18,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 230 conjunts are in the unsatisfiable core [2023-12-20 00:28:18,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:28:18,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:28:18,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:28:18,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:28:18,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:30:14,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:30:14,655 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-20 00:30:14,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2023-12-20 00:30:15,188 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-20 00:30:15,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 48 [2023-12-20 00:30:15,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:30:15,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 71 [2023-12-20 00:30:15,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-20 00:30:15,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 00:30:20,508 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 [2023-12-20 00:30:20,534 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 15 treesize of output 7 [2023-12-20 00:30:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 70 proven. 89 refuted. 16 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-20 00:30:21,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:30:23,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:30:23,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153941596] [2023-12-20 00:30:23,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:30:23,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675241803] [2023-12-20 00:30:23,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675241803] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:30:23,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:30:23,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-12-20 00:30:23,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480513467] [2023-12-20 00:30:23,925 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:30:23,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-20 00:30:23,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:30:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-20 00:30:23,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=813, Unknown=24, NotChecked=0, Total=930 [2023-12-20 00:30:23,926 INFO L87 Difference]: Start difference. First operand 306 states and 351 transitions. Second operand has 27 states, 25 states have (on average 2.2) internal successors, (55), 21 states have internal predecessors, (55), 11 states have call successors, (19), 9 states have call predecessors, (19), 7 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2023-12-20 00:30:29,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:30:33,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:30:37,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:30:41,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:30:45,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:30:49,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:30:53,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:30:57,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:31:01,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:31:05,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:31:10,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:31:19,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:31:23,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:31:27,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:31:31,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:31:35,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-20 00:31:39,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] Received shutdown request... [2023-12-20 00:31:40,049 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 00:31:40,060 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 00:31:41,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 00:31:41,261 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-20 00:31:41,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 117.0s TimeCoverageRelationStatistics Valid=99, Invalid=868, Unknown=25, NotChecked=0, Total=992 [2023-12-20 00:31:41,355 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:31:41,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 224 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 17 Unknown, 0 Unchecked, 71.2s Time] [2023-12-20 00:31:41,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-20 00:31:41,356 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 00:31:41,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-20 00:31:41,357 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-12-20 00:31:41,359 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:31:41,361 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 00:31:41,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 12:31:41 BoogieIcfgContainer [2023-12-20 00:31:41,362 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 00:31:41,362 INFO L158 Benchmark]: Toolchain (without parser) took 876686.52ms. Allocated memory was 182.5MB in the beginning and 243.3MB in the end (delta: 60.8MB). Free memory was 123.1MB in the beginning and 173.9MB in the end (delta: -50.7MB). Peak memory consumption was 137.8MB. Max. memory is 8.0GB. [2023-12-20 00:31:41,362 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 182.5MB. Free memory is still 134.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 00:31:41,362 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.37ms. Allocated memory is still 182.5MB. Free memory was 123.1MB in the beginning and 110.3MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-20 00:31:41,362 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.99ms. Allocated memory is still 182.5MB. Free memory was 110.3MB in the beginning and 108.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 00:31:41,362 INFO L158 Benchmark]: Boogie Preprocessor took 42.70ms. Allocated memory is still 182.5MB. Free memory was 108.5MB in the beginning and 105.0MB in the end (delta: 3.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-20 00:31:41,363 INFO L158 Benchmark]: RCFGBuilder took 526.18ms. Allocated memory was 182.5MB in the beginning and 243.3MB in the end (delta: 60.8MB). Free memory was 105.0MB in the beginning and 186.8MB in the end (delta: -81.7MB). Peak memory consumption was 14.3MB. Max. memory is 8.0GB. [2023-12-20 00:31:41,363 INFO L158 Benchmark]: TraceAbstraction took 875894.46ms. Allocated memory is still 243.3MB. Free memory was 186.2MB in the beginning and 173.9MB in the end (delta: 12.4MB). Peak memory consumption was 139.2MB. Max. memory is 8.0GB. [2023-12-20 00:31:41,363 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 182.5MB. Free memory is still 134.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 190.37ms. Allocated memory is still 182.5MB. Free memory was 123.1MB in the beginning and 110.3MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.99ms. Allocated memory is still 182.5MB. Free memory was 110.3MB in the beginning and 108.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.70ms. Allocated memory is still 182.5MB. Free memory was 108.5MB in the beginning and 105.0MB in the end (delta: 3.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 526.18ms. Allocated memory was 182.5MB in the beginning and 243.3MB in the end (delta: 60.8MB). Free memory was 105.0MB in the beginning and 186.8MB in the end (delta: -81.7MB). Peak memory consumption was 14.3MB. Max. memory is 8.0GB. * TraceAbstraction took 875894.46ms. Allocated memory is still 243.3MB. Free memory was 186.2MB in the beginning and 173.9MB in the end (delta: 12.4MB). Peak memory consumption was 139.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 37). Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 875.9s, OverallIterations: 14, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 531.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 mSolverCounterUnknown, 914 SdHoareTripleChecker+Valid, 360.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 887 mSDsluCounter, 4129 SdHoareTripleChecker+Invalid, 357.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 311 IncrementalHoareTripleChecker+Unchecked, 3621 mSDsCounter, 591 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8148 IncrementalHoareTripleChecker+Invalid, 9123 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 591 mSolverCounterUnsat, 508 mSDtfsCounter, 8148 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1593 GetRequests, 1015 SyntacticMatches, 79 SemanticMatches, 499 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4954 ImplicationChecksByTransitivity, 417.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=306occurred in iteration=13, InterpolantAutomatonStates: 271, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 13 MinimizatonAttempts, 130 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 337.1s InterpolantComputationTime, 989 NumberOfCodeBlocks, 965 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1336 ConstructedInterpolants, 359 QuantifiedInterpolants, 38436 SizeOfPredicates, 795 NumberOfNonLiveVariables, 9811 ConjunctsInSsa, 2372 ConjunctsInUnsatCore, 21 InterpolantComputations, 4 PerfectInterpolantSequences, 1220/1648 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown