/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_Bitvector.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_hard2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-25 07:01:01,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-25 07:01:02,044 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-12-25 07:01:02,049 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-25 07:01:02,049 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-25 07:01:02,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-25 07:01:02,072 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-25 07:01:02,072 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-25 07:01:02,073 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-25 07:01:02,076 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-25 07:01:02,076 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-25 07:01:02,076 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-25 07:01:02,077 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-25 07:01:02,078 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-25 07:01:02,078 INFO L153 SettingsManager]: * Use SBE=true [2023-12-25 07:01:02,078 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-25 07:01:02,078 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-25 07:01:02,079 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-25 07:01:02,079 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-25 07:01:02,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-25 07:01:02,079 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-25 07:01:02,079 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-25 07:01:02,080 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-25 07:01:02,080 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-25 07:01:02,080 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-25 07:01:02,080 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-25 07:01:02,080 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-25 07:01:02,080 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-25 07:01:02,080 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-25 07:01:02,081 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-25 07:01:02,081 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-25 07:01:02,081 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-25 07:01:02,082 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-25 07:01:02,082 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-25 07:01:02,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-25 07:01:02,082 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-25 07:01:02,082 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-25 07:01:02,082 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-25 07:01:02,082 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-25 07:01:02,082 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-25 07:01:02,082 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-25 07:01:02,083 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-25 07:01:02,083 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-25 07:01:02,083 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-25 07:01:02,083 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-25 07:01:02,083 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-25 07:01:02,083 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-25 07:01:02,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-25 07:01:02,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-25 07:01:02,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-25 07:01:02,317 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-25 07:01:02,317 INFO L274 PluginConnector]: CDTParser initialized [2023-12-25 07:01:02,318 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_hard2.c [2023-12-25 07:01:03,449 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-25 07:01:03,649 INFO L384 CDTParser]: Found 1 translation units. [2023-12-25 07:01:03,649 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_hard2.c [2023-12-25 07:01:03,658 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da1ba85a7/e17231c599b442b9a1af3b9042f3d84e/FLAGed4ecc83d [2023-12-25 07:01:03,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da1ba85a7/e17231c599b442b9a1af3b9042f3d84e [2023-12-25 07:01:03,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-25 07:01:03,679 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-25 07:01:03,681 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-25 07:01:03,681 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-25 07:01:03,685 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-25 07:01:03,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40d98e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03, skipping insertion in model container [2023-12-25 07:01:03,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,707 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-25 07:01:03,809 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_hard2.c[1067,1080] [2023-12-25 07:01:03,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-25 07:01:03,833 INFO L202 MainTranslator]: Completed pre-run [2023-12-25 07:01:03,842 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_hard2.c[1067,1080] [2023-12-25 07:01:03,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-25 07:01:03,872 INFO L206 MainTranslator]: Completed translation [2023-12-25 07:01:03,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03 WrapperNode [2023-12-25 07:01:03,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-25 07:01:03,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-25 07:01:03,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-25 07:01:03,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-25 07:01:03,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,891 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,904 INFO L138 Inliner]: procedures = 19, calls = 90, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-12-25 07:01:03,904 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-25 07:01:03,905 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-25 07:01:03,905 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-25 07:01:03,905 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-25 07:01:03,913 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,916 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,927 INFO L175 MemorySlicer]: Split 56 memory accesses to 8 slices as follows [2, 8, 9, 12, 6, 5, 8, 6]. 21 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 0, 3, 3, 2, 1, 2, 1]. [2023-12-25 07:01:03,928 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,928 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,934 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,936 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,938 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,938 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,941 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-25 07:01:03,942 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-25 07:01:03,942 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-25 07:01:03,942 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-25 07:01:03,943 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (1/1) ... [2023-12-25 07:01:03,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-25 07:01:03,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-25 07:01:03,966 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) [2023-12-25 07:01:03,974 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 [2023-12-25 07:01:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-25 07:01:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2023-12-25 07:01:03,987 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2023-12-25 07:01:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#5 [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#6 [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#7 [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-12-25 07:01:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-12-25 07:01:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-12-25 07:01:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-12-25 07:01:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#5 [2023-12-25 07:01:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#6 [2023-12-25 07:01:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#7 [2023-12-25 07:01:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2023-12-25 07:01:03,989 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2023-12-25 07:01:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-25 07:01:03,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-25 07:01:03,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-25 07:01:03,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-25 07:01:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-25 07:01:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-12-25 07:01:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-12-25 07:01:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-12-25 07:01:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-12-25 07:01:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-12-25 07:01:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#5 [2023-12-25 07:01:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#6 [2023-12-25 07:01:03,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#7 [2023-12-25 07:01:04,114 INFO L241 CfgBuilder]: Building ICFG [2023-12-25 07:01:04,116 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-25 07:01:04,480 INFO L282 CfgBuilder]: Performing block encoding [2023-12-25 07:01:04,529 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-25 07:01:04,529 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-25 07:01:04,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.12 07:01:04 BoogieIcfgContainer [2023-12-25 07:01:04,529 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-25 07:01:04,531 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-25 07:01:04,531 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-25 07:01:04,537 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-25 07:01:04,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.12 07:01:03" (1/3) ... [2023-12-25 07:01:04,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc02038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.12 07:01:04, skipping insertion in model container [2023-12-25 07:01:04,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.12 07:01:03" (2/3) ... [2023-12-25 07:01:04,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc02038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.12 07:01:04, skipping insertion in model container [2023-12-25 07:01:04,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.12 07:01:04" (3/3) ... [2023-12-25 07:01:04,540 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2023-12-25 07:01:04,554 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-25 07:01:04,554 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-25 07:01:04,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-25 07:01:04,589 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;@2cc37879, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-25 07:01:04,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-25 07:01:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 25 states have internal predecessors, (29), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-25 07:01:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-25 07:01:04,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:01:04,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 07:01:04,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:01:04,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:01:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash -93468211, now seen corresponding path program 1 times [2023-12-25 07:01:04,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:01:04,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200558055] [2023-12-25 07:01:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:01:04,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:01:04,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:01:04,615 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:01:04,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-25 07:01:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:01:04,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-25 07:01:04,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:01:04,768 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 [2023-12-25 07:01:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 07:01:04,854 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-25 07:01:04,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:01:04,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200558055] [2023-12-25 07:01:04,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200558055] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 07:01:04,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 07:01:04,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-25 07:01:04,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193354135] [2023-12-25 07:01:04,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 07:01:04,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-25 07:01:04,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:01:04,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-25 07:01:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-25 07:01:04,884 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 25 states have internal predecessors, (29), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 07:01:06,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:01:06,078 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2023-12-25 07:01:06,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-25 07:01:06,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-25 07:01:06,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:01:06,085 INFO L225 Difference]: With dead ends: 78 [2023-12-25 07:01:06,085 INFO L226 Difference]: Without dead ends: 40 [2023-12-25 07:01:06,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-25 07:01:06,094 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-25 07:01:06,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 216 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-25 07:01:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-25 07:01:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-25 07:01:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 27 states have internal predecessors, (28), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-25 07:01:06,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2023-12-25 07:01:06,139 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 8 [2023-12-25 07:01:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:01:06,139 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2023-12-25 07:01:06,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-25 07:01:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2023-12-25 07:01:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-25 07:01:06,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:01:06,141 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 07:01:06,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-12-25 07:01:06,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:01:06,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:01:06,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:01:06,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1672762703, now seen corresponding path program 1 times [2023-12-25 07:01:06,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:01:06,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828639014] [2023-12-25 07:01:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:01:06,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:01:06,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:01:06,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:01:06,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-25 07:01:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:01:06,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-25 07:01:06,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:01:06,430 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 [2023-12-25 07:01:10,552 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_30_to_37_0_~A.offset_BEFORE_CALL_1 (_ BitVec 32)) (v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_1 (_ BitVec 32)) (v_func_to_recursive_line_30_to_37_0_~A.base_BEFORE_CALL_1 (_ BitVec 32)) (v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_1 (_ BitVec 32))) (= (select (select |c_#memory_int#5| v_func_to_recursive_line_30_to_37_0_~A.base_BEFORE_CALL_1) v_func_to_recursive_line_30_to_37_0_~A.offset_BEFORE_CALL_1) (select (select |c_#memory_int#6| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_1) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_1))) is different from true [2023-12-25 07:01:10,714 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 [2023-12-25 07:01:10,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-25 07:01:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-25 07:01:10,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:01:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-25 07:01:11,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:01:11,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828639014] [2023-12-25 07:01:11,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828639014] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-25 07:01:11,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-25 07:01:11,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2023-12-25 07:01:11,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610963224] [2023-12-25 07:01:11,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 07:01:11,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-25 07:01:11,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:01:11,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-25 07:01:11,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=72, Unknown=1, NotChecked=16, Total=110 [2023-12-25 07:01:11,232 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-25 07:01:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:01:13,265 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-12-25 07:01:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-25 07:01:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-25 07:01:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:01:13,267 INFO L225 Difference]: With dead ends: 46 [2023-12-25 07:01:13,267 INFO L226 Difference]: Without dead ends: 44 [2023-12-25 07:01:13,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=35, Invalid=124, Unknown=1, NotChecked=22, Total=182 [2023-12-25 07:01:13,269 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 18 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-25 07:01:13,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 213 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-25 07:01:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-25 07:01:13,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-25 07:01:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-25 07:01:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-12-25 07:01:13,278 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 14 [2023-12-25 07:01:13,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:01:13,279 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-12-25 07:01:13,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-25 07:01:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-12-25 07:01:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-25 07:01:13,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:01:13,280 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 07:01:13,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-12-25 07:01:13,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:01:13,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:01:13,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:01:13,485 INFO L85 PathProgramCache]: Analyzing trace with hash 588742735, now seen corresponding path program 1 times [2023-12-25 07:01:13,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:01:13,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474074097] [2023-12-25 07:01:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:01:13,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:01:13,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:01:13,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:01:13,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-25 07:01:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:01:13,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-25 07:01:13,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:01:13,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-25 07:01:13,648 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 [2023-12-25 07:01:13,673 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 [2023-12-25 07:01:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-25 07:01:15,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:01:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-25 07:01:17,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:01:17,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474074097] [2023-12-25 07:01:17,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474074097] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-25 07:01:17,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-25 07:01:17,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2023-12-25 07:01:17,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939469664] [2023-12-25 07:01:17,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 07:01:17,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-25 07:01:17,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:01:17,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-25 07:01:17,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-12-25 07:01:17,326 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-25 07:01:26,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-25 07:01:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:01:28,173 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2023-12-25 07:01:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-25 07:01:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-25 07:01:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:01:28,181 INFO L225 Difference]: With dead ends: 62 [2023-12-25 07:01:28,181 INFO L226 Difference]: Without dead ends: 60 [2023-12-25 07:01:28,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-12-25 07:01:28,182 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-12-25 07:01:28,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 227 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2023-12-25 07:01:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-25 07:01:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-12-25 07:01:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.135135135135135) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2023-12-25 07:01:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2023-12-25 07:01:28,195 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 20 [2023-12-25 07:01:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:01:28,195 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2023-12-25 07:01:28,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-25 07:01:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2023-12-25 07:01:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-25 07:01:28,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:01:28,205 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-25 07:01:28,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-12-25 07:01:28,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:01:28,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:01:28,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:01:28,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1249325219, now seen corresponding path program 1 times [2023-12-25 07:01:28,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:01:28,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254935207] [2023-12-25 07:01:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:01:28,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:01:28,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:01:28,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:01:28,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-25 07:01:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:01:28,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-25 07:01:28,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:01:28,549 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 [2023-12-25 07:01:28,574 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 [2023-12-25 07:01:28,604 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 [2023-12-25 07:01:29,854 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 [2023-12-25 07:01:29,868 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 15 treesize of output 7 [2023-12-25 07:01:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-25 07:01:30,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:01:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-25 07:01:32,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:01:32,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254935207] [2023-12-25 07:01:32,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254935207] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-25 07:01:32,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-25 07:01:32,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2023-12-25 07:01:32,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289984950] [2023-12-25 07:01:32,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 07:01:32,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-25 07:01:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:01:32,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-25 07:01:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-12-25 07:01:32,939 INFO L87 Difference]: Start difference. First operand 59 states and 70 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-25 07:01:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:01:40,248 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2023-12-25 07:01:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-25 07:01:40,251 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-25 07:01:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:01:40,254 INFO L225 Difference]: With dead ends: 82 [2023-12-25 07:01:40,254 INFO L226 Difference]: Without dead ends: 80 [2023-12-25 07:01:40,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-12-25 07:01:40,255 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-25 07:01:40,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 207 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-25 07:01:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-25 07:01:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2023-12-25 07:01:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (21), 16 states have call predecessors, (21), 16 states have call successors, (21) [2023-12-25 07:01:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2023-12-25 07:01:40,275 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 32 [2023-12-25 07:01:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:01:40,275 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2023-12-25 07:01:40,275 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, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-25 07:01:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2023-12-25 07:01:40,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-25 07:01:40,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:01:40,276 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1] [2023-12-25 07:01:40,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-12-25 07:01:40,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:01:40,478 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:01:40,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:01:40,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1316300518, now seen corresponding path program 1 times [2023-12-25 07:01:40,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:01:40,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115684062] [2023-12-25 07:01:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:01:40,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:01:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:01:40,483 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:01:40,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-25 07:01:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:01:40,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-25 07:01:40,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:01:40,644 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 [2023-12-25 07:01:40,674 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 11 treesize of output 7 [2023-12-25 07:01:40,705 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 [2023-12-25 07:01:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-25 07:01:42,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:01:46,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:01:46,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115684062] [2023-12-25 07:01:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115684062] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:01:46,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [910345565] [2023-12-25 07:01:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:01:46,261 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-25 07:01:46,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-25 07:01:46,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-25 07:01:46,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-12-25 07:01:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:01:46,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-25 07:01:46,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:01:46,534 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 [2023-12-25 07:01:46,556 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 [2023-12-25 07:01:46,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-25 07:01:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-25 07:01:50,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:01:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-25 07:01:53,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [910345565] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-25 07:01:53,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:01:53,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 11] total 25 [2023-12-25 07:01:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735009668] [2023-12-25 07:01:53,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 07:01:53,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-25 07:01:53,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:01:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-25 07:01:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-12-25 07:01:53,739 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-25 07:02:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:02:10,447 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2023-12-25 07:02:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-25 07:02:10,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2023-12-25 07:02:10,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:02:10,455 INFO L225 Difference]: With dead ends: 100 [2023-12-25 07:02:10,455 INFO L226 Difference]: Without dead ends: 98 [2023-12-25 07:02:10,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2023-12-25 07:02:10,456 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-12-25 07:02:10,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 102 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2023-12-25 07:02:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-25 07:02:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2023-12-25 07:02:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 63 states have internal predecessors, (67), 20 states have call successors, (20), 11 states have call predecessors, (20), 14 states have return successors, (28), 19 states have call predecessors, (28), 19 states have call successors, (28) [2023-12-25 07:02:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2023-12-25 07:02:10,473 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 38 [2023-12-25 07:02:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:02:10,474 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2023-12-25 07:02:10,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-25 07:02:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2023-12-25 07:02:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-25 07:02:10,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:02:10,475 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 07:02:10,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2023-12-25 07:02:10,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-25 07:02:10,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:02:10,886 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:02:10,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:02:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash 812097954, now seen corresponding path program 1 times [2023-12-25 07:02:10,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:02:10,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517639071] [2023-12-25 07:02:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:02:10,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:02:10,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:02:10,888 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:02:10,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-25 07:02:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:02:11,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-25 07:02:11,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:02:11,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-25 07:02:11,043 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 [2023-12-25 07:02:11,086 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 [2023-12-25 07:02:12,342 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 [2023-12-25 07:02:12,364 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 [2023-12-25 07:02:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-25 07:02:13,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:02:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-25 07:02:18,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:02:18,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517639071] [2023-12-25 07:02:18,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517639071] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-25 07:02:18,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:02:18,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2023-12-25 07:02:18,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363684690] [2023-12-25 07:02:18,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 07:02:18,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-25 07:02:18,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:02:18,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-25 07:02:18,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-12-25 07:02:18,128 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 20 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (16), 9 states have call predecessors, (16), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-25 07:02:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:02:33,629 INFO L93 Difference]: Finished difference Result 174 states and 199 transitions. [2023-12-25 07:02:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-25 07:02:33,632 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (16), 9 states have call predecessors, (16), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 42 [2023-12-25 07:02:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:02:33,633 INFO L225 Difference]: With dead ends: 174 [2023-12-25 07:02:33,633 INFO L226 Difference]: Without dead ends: 172 [2023-12-25 07:02:33,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-12-25 07:02:33,635 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 110 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-12-25 07:02:33,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 419 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2023-12-25 07:02:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-25 07:02:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2023-12-25 07:02:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 113 states have internal predecessors, (120), 31 states have call successors, (31), 23 states have call predecessors, (31), 28 states have return successors, (43), 31 states have call predecessors, (43), 28 states have call successors, (43) [2023-12-25 07:02:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2023-12-25 07:02:33,658 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 42 [2023-12-25 07:02:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:02:33,658 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2023-12-25 07:02:33,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 14 states have internal predecessors, (36), 8 states have call successors, (16), 9 states have call predecessors, (16), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-25 07:02:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2023-12-25 07:02:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-25 07:02:33,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:02:33,659 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2023-12-25 07:02:33,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-12-25 07:02:33,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:02:33,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:02:33,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:02:33,864 INFO L85 PathProgramCache]: Analyzing trace with hash -413636343, now seen corresponding path program 1 times [2023-12-25 07:02:33,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:02:33,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214971868] [2023-12-25 07:02:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:02:33,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:02:33,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:02:33,867 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:02:33,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-25 07:02:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:02:34,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-25 07:02:34,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:02:34,016 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 [2023-12-25 07:02:34,036 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 [2023-12-25 07:02:34,662 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 [2023-12-25 07:02:34,902 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 [2023-12-25 07:02:34,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-25 07:02:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-25 07:02:35,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:02:40,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:02:40,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214971868] [2023-12-25 07:02:40,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214971868] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:02:40,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1348499266] [2023-12-25 07:02:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:02:40,148 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-25 07:02:40,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-25 07:02:40,149 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-25 07:02:40,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-12-25 07:02:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:02:40,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-25 07:02:40,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:02:40,413 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 [2023-12-25 07:02:40,453 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 [2023-12-25 07:02:40,464 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 [2023-12-25 07:02:41,393 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 11 treesize of output 7 [2023-12-25 07:02:41,614 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 [2023-12-25 07:02:41,624 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 [2023-12-25 07:02:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-25 07:02:41,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:02:43,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1348499266] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:02:43,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:02:43,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2023-12-25 07:02:43,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811803692] [2023-12-25 07:02:43,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 07:02:43,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-25 07:02:43,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:02:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-25 07:02:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=124, Unknown=1, NotChecked=0, Total=156 [2023-12-25 07:02:43,036 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 6 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-25 07:02:49,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-25 07:02:54,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-25 07:02:59,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-25 07:02:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:02:59,237 INFO L93 Difference]: Finished difference Result 197 states and 228 transitions. [2023-12-25 07:02:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-25 07:02:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 6 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 48 [2023-12-25 07:02:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:02:59,239 INFO L225 Difference]: With dead ends: 197 [2023-12-25 07:02:59,239 INFO L226 Difference]: Without dead ends: 193 [2023-12-25 07:02:59,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=65, Invalid=206, Unknown=1, NotChecked=0, Total=272 [2023-12-25 07:02:59,240 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 35 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2023-12-25 07:02:59,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 85 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 265 Invalid, 3 Unknown, 0 Unchecked, 15.8s Time] [2023-12-25 07:02:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-12-25 07:02:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2023-12-25 07:02:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 121 states have (on average 1.0991735537190082) internal successors, (133), 126 states have internal predecessors, (133), 34 states have call successors, (34), 27 states have call predecessors, (34), 31 states have return successors, (46), 34 states have call predecessors, (46), 30 states have call successors, (46) [2023-12-25 07:02:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 213 transitions. [2023-12-25 07:02:59,289 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 213 transitions. Word has length 48 [2023-12-25 07:02:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:02:59,289 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 213 transitions. [2023-12-25 07:02:59,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 6 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-25 07:02:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 213 transitions. [2023-12-25 07:02:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-25 07:02:59,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:02:59,290 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2023-12-25 07:02:59,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-12-25 07:02:59,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2023-12-25 07:02:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-25 07:02:59,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:02:59,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:02:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1419410849, now seen corresponding path program 1 times [2023-12-25 07:02:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:02:59,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886220677] [2023-12-25 07:02:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:02:59,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:02:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:02:59,697 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:02:59,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-25 07:02:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:02:59,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-25 07:02:59,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:02:59,852 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 [2023-12-25 07:03:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-25 07:03:00,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-25 07:03:00,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:03:00,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886220677] [2023-12-25 07:03:00,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886220677] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-25 07:03:00,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-25 07:03:00,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-25 07:03:00,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952188378] [2023-12-25 07:03:00,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-25 07:03:00,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-25 07:03:00,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:03:00,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-25 07:03:00,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-25 07:03:00,472 INFO L87 Difference]: Start difference. First operand 187 states and 213 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-25 07:03:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:03:02,855 INFO L93 Difference]: Finished difference Result 244 states and 280 transitions. [2023-12-25 07:03:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-25 07:03:02,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2023-12-25 07:03:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:03:02,857 INFO L225 Difference]: With dead ends: 244 [2023-12-25 07:03:02,857 INFO L226 Difference]: Without dead ends: 191 [2023-12-25 07:03:02,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-12-25 07:03:02,858 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-25 07:03:02,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 108 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-25 07:03:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-12-25 07:03:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2023-12-25 07:03:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 121 states have (on average 1.0909090909090908) internal successors, (132), 126 states have internal predecessors, (132), 34 states have call successors, (34), 27 states have call predecessors, (34), 31 states have return successors, (44), 34 states have call predecessors, (44), 30 states have call successors, (44) [2023-12-25 07:03:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2023-12-25 07:03:02,886 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 49 [2023-12-25 07:03:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:03:02,888 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2023-12-25 07:03:02,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-25 07:03:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2023-12-25 07:03:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-25 07:03:02,890 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:03:02,890 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2023-12-25 07:03:02,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-12-25 07:03:03,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:03:03,095 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:03:03,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:03:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash -209116920, now seen corresponding path program 1 times [2023-12-25 07:03:03,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:03:03,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618193060] [2023-12-25 07:03:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:03:03,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:03:03,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:03:03,098 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:03:03,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-25 07:03:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:03:03,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-25 07:03:03,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:03:03,267 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 [2023-12-25 07:03:03,297 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 [2023-12-25 07:03:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-25 07:03:04,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:03:09,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:03:09,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618193060] [2023-12-25 07:03:09,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618193060] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:03:09,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [44295321] [2023-12-25 07:03:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:03:09,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-25 07:03:09,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-25 07:03:09,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-25 07:03:09,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-12-25 07:03:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:03:09,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-25 07:03:09,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:03:09,374 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 [2023-12-25 07:03:09,404 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 [2023-12-25 07:03:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-25 07:03:10,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:03:15,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [44295321] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:03:15,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:03:15,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2023-12-25 07:03:15,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635386627] [2023-12-25 07:03:15,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 07:03:15,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-25 07:03:15,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:03:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-25 07:03:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2023-12-25 07:03:15,172 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-25 07:03:17,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:03:17,844 INFO L93 Difference]: Finished difference Result 191 states and 214 transitions. [2023-12-25 07:03:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-25 07:03:17,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 54 [2023-12-25 07:03:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:03:17,846 INFO L225 Difference]: With dead ends: 191 [2023-12-25 07:03:17,846 INFO L226 Difference]: Without dead ends: 159 [2023-12-25 07:03:17,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 116 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=85, Invalid=294, Unknown=1, NotChecked=0, Total=380 [2023-12-25 07:03:17,847 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-25 07:03:17,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 120 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-25 07:03:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-25 07:03:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2023-12-25 07:03:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 101 states have (on average 1.099009900990099) internal successors, (111), 106 states have internal predecessors, (111), 29 states have call successors, (29), 22 states have call predecessors, (29), 26 states have return successors, (39), 29 states have call predecessors, (39), 26 states have call successors, (39) [2023-12-25 07:03:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 179 transitions. [2023-12-25 07:03:17,868 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 179 transitions. Word has length 54 [2023-12-25 07:03:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:03:17,868 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 179 transitions. [2023-12-25 07:03:17,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 4 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-25 07:03:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 179 transitions. [2023-12-25 07:03:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-25 07:03:17,873 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:03:17,873 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 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] [2023-12-25 07:03:17,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2023-12-25 07:03:18,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-12-25 07:03:18,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:03:18,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:03:18,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:03:18,278 INFO L85 PathProgramCache]: Analyzing trace with hash 285838631, now seen corresponding path program 1 times [2023-12-25 07:03:18,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:03:18,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318076010] [2023-12-25 07:03:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:03:18,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:03:18,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:03:18,280 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:03:18,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-12-25 07:03:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:03:18,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-25 07:03:18,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:03:18,450 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 15 treesize of output 11 [2023-12-25 07:03:18,473 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 [2023-12-25 07:03:18,506 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 [2023-12-25 07:03:20,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-25 07:03:20,375 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 [2023-12-25 07:03:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-25 07:03:21,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:03:35,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:03:35,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318076010] [2023-12-25 07:03:35,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318076010] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:03:35,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [677355269] [2023-12-25 07:03:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:03:35,386 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-25 07:03:35,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-25 07:03:35,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-25 07:03:35,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-12-25 07:03:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:03:35,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-25 07:03:35,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:03:35,670 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 [2023-12-25 07:03:35,702 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 [2023-12-25 07:03:35,734 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 [2023-12-25 07:03:49,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-25 07:03:49,931 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 [2023-12-25 07:03:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-25 07:03:52,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:04:12,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [677355269] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:04:12,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:04:12,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2023-12-25 07:04:12,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426663531] [2023-12-25 07:04:12,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 07:04:12,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-25 07:04:12,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:04:12,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-25 07:04:12,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=980, Unknown=8, NotChecked=0, Total=1122 [2023-12-25 07:04:12,275 INFO L87 Difference]: Start difference. First operand 157 states and 179 transitions. Second operand has 25 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 13 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2023-12-25 07:04:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:04:22,659 INFO L93 Difference]: Finished difference Result 167 states and 188 transitions. [2023-12-25 07:04:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-25 07:04:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 13 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 62 [2023-12-25 07:04:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:04:22,660 INFO L225 Difference]: With dead ends: 167 [2023-12-25 07:04:22,660 INFO L226 Difference]: Without dead ends: 163 [2023-12-25 07:04:22,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=214, Invalid=1338, Unknown=8, NotChecked=0, Total=1560 [2023-12-25 07:04:22,661 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-12-25 07:04:22,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 162 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 634 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2023-12-25 07:04:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-12-25 07:04:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2023-12-25 07:04:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 103 states have (on average 1.087378640776699) internal successors, (112), 107 states have internal predecessors, (112), 29 states have call successors, (29), 23 states have call predecessors, (29), 26 states have return successors, (39), 29 states have call predecessors, (39), 26 states have call successors, (39) [2023-12-25 07:04:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2023-12-25 07:04:22,684 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 62 [2023-12-25 07:04:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:04:22,685 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2023-12-25 07:04:22,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 13 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2023-12-25 07:04:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2023-12-25 07:04:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-25 07:04:22,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:04:22,685 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2023-12-25 07:04:22,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2023-12-25 07:04:22,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-12-25 07:04:23,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:04:23,101 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:04:23,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:04:23,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1185460084, now seen corresponding path program 1 times [2023-12-25 07:04:23,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:04:23,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526277563] [2023-12-25 07:04:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:04:23,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:04:23,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:04:23,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:04:23,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-25 07:04:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:04:23,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 126 conjunts are in the unsatisfiable core [2023-12-25 07:04:23,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:04:23,376 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 [2023-12-25 07:04:23,403 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 [2023-12-25 07:04:23,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-25 07:04:23,451 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 [2023-12-25 07:04:23,485 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 [2023-12-25 07:04:26,114 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 [2023-12-25 07:04:28,380 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 [2023-12-25 07:04:28,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-25 07:04:32,054 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 [2023-12-25 07:04:32,121 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 [2023-12-25 07:04:32,593 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2023-12-25 07:04:32,593 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 29 [2023-12-25 07:04:32,856 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2023-12-25 07:04:32,856 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 55 treesize of output 58 [2023-12-25 07:04:34,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-25 07:04:34,764 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 92 treesize of output 184 [2023-12-25 07:04:35,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-25 07:04:35,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 179 [2023-12-25 07:04:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 48 proven. 29 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-25 07:04:36,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:05:39,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:05:39,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526277563] [2023-12-25 07:05:39,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526277563] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:05:39,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776065937] [2023-12-25 07:05:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:05:39,474 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-25 07:05:39,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-25 07:05:39,475 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-25 07:05:39,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-12-25 07:05:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:05:39,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 131 conjunts are in the unsatisfiable core [2023-12-25 07:05:39,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:05:39,849 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 [2023-12-25 07:05:39,880 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 [2023-12-25 07:05:39,922 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 [2023-12-25 07:05:39,954 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 [2023-12-25 07:05:39,978 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 [2023-12-25 07:05:40,004 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 [2023-12-25 07:05:53,766 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 [2023-12-25 07:05:53,800 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 [2023-12-25 07:06:10,595 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 [2023-12-25 07:06:10,667 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 [2023-12-25 07:06:12,498 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-25 07:06:12,499 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 [2023-12-25 07:06:12,709 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-12-25 07:06:12,710 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 40 treesize of output 43 [2023-12-25 07:06:17,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-25 07:06:17,735 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 76 treesize of output 76 [2023-12-25 07:06:17,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-25 07:06:17,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 96 [2023-12-25 07:06:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 48 proven. 29 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-25 07:06:19,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:06:58,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776065937] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:06:58,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:06:58,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2023-12-25 07:06:58,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139893185] [2023-12-25 07:06:58,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 07:06:58,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-25 07:06:58,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:06:58,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-25 07:06:58,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2250, Unknown=8, NotChecked=0, Total=2450 [2023-12-25 07:06:58,623 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 36 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 16 states have call successors, (26), 11 states have call predecessors, (26), 8 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-25 07:07:55,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-25 07:08:17,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-25 07:08:22,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-25 07:08:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:08:24,527 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2023-12-25 07:08:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-25 07:08:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 16 states have call successors, (26), 11 states have call predecessors, (26), 8 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 73 [2023-12-25 07:08:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:08:24,532 INFO L225 Difference]: With dead ends: 187 [2023-12-25 07:08:24,532 INFO L226 Difference]: Without dead ends: 185 [2023-12-25 07:08:24,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 175.9s TimeCoverageRelationStatistics Valid=340, Invalid=3807, Unknown=13, NotChecked=0, Total=4160 [2023-12-25 07:08:24,533 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 140 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 74 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.4s IncrementalHoareTripleChecker+Time [2023-12-25 07:08:24,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 301 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1453 Invalid, 7 Unknown, 0 Unchecked, 35.4s Time] [2023-12-25 07:08:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-25 07:08:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2023-12-25 07:08:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 116 states have (on average 1.103448275862069) internal successors, (128), 122 states have internal predecessors, (128), 33 states have call successors, (33), 25 states have call predecessors, (33), 30 states have return successors, (50), 33 states have call predecessors, (50), 30 states have call successors, (50) [2023-12-25 07:08:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 211 transitions. [2023-12-25 07:08:24,579 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 211 transitions. Word has length 73 [2023-12-25 07:08:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:08:24,579 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 211 transitions. [2023-12-25 07:08:24,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 16 states have call successors, (26), 11 states have call predecessors, (26), 8 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-25 07:08:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 211 transitions. [2023-12-25 07:08:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-25 07:08:24,580 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:08:24,580 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 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] [2023-12-25 07:08:24,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-12-25 07:08:24,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2023-12-25 07:08:24,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-25 07:08:24,992 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:08:24,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:08:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash 532683541, now seen corresponding path program 1 times [2023-12-25 07:08:24,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:08:24,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360437308] [2023-12-25 07:08:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:08:24,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:08:24,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:08:24,994 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:08:24,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-12-25 07:08:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:08:25,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-25 07:08:25,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:08:25,201 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 [2023-12-25 07:08:25,869 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 [2023-12-25 07:08:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-25 07:08:26,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:08:28,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:08:28,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360437308] [2023-12-25 07:08:28,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360437308] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:08:28,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [54838651] [2023-12-25 07:08:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:08:28,390 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-25 07:08:28,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-25 07:08:28,391 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-25 07:08:28,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-12-25 07:08:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:08:28,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-25 07:08:28,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:08:28,699 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 [2023-12-25 07:08:28,723 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 [2023-12-25 07:08:29,345 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 11 [2023-12-25 07:08:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 48 proven. 10 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-25 07:08:29,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:08:31,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [54838651] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:08:31,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:08:31,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2023-12-25 07:08:31,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918597244] [2023-12-25 07:08:31,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 07:08:31,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-25 07:08:31,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:08:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-25 07:08:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-12-25 07:08:31,224 INFO L87 Difference]: Start difference. First operand 180 states and 211 transitions. Second operand has 13 states, 8 states have (on average 4.0) internal successors, (32), 11 states have internal predecessors, (32), 9 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2023-12-25 07:08:35,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:08:35,755 INFO L93 Difference]: Finished difference Result 188 states and 220 transitions. [2023-12-25 07:08:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-25 07:08:35,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 4.0) internal successors, (32), 11 states have internal predecessors, (32), 9 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 78 [2023-12-25 07:08:35,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:08:35,757 INFO L225 Difference]: With dead ends: 188 [2023-12-25 07:08:35,757 INFO L226 Difference]: Without dead ends: 174 [2023-12-25 07:08:35,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-12-25 07:08:35,757 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-25 07:08:35,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-12-25 07:08:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-12-25 07:08:35,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2023-12-25 07:08:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 115 states have internal predecessors, (120), 31 states have call successors, (31), 23 states have call predecessors, (31), 29 states have return successors, (50), 31 states have call predecessors, (50), 29 states have call successors, (50) [2023-12-25 07:08:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 201 transitions. [2023-12-25 07:08:35,814 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 201 transitions. Word has length 78 [2023-12-25 07:08:35,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:08:35,814 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 201 transitions. [2023-12-25 07:08:35,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 4.0) internal successors, (32), 11 states have internal predecessors, (32), 9 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2023-12-25 07:08:35,815 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 201 transitions. [2023-12-25 07:08:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-25 07:08:35,815 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:08:35,815 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 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] [2023-12-25 07:08:35,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2023-12-25 07:08:36,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-12-25 07:08:36,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:08:36,221 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:08:36,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:08:36,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1238878825, now seen corresponding path program 1 times [2023-12-25 07:08:36,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:08:36,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296748357] [2023-12-25 07:08:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:08:36,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:08:36,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:08:36,223 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:08:36,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-12-25 07:08:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:08:36,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-25 07:08:36,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:08:36,553 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 [2023-12-25 07:08:36,575 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 [2023-12-25 07:08:36,608 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 [2023-12-25 07:08:38,600 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 [2023-12-25 07:08:38,623 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 [2023-12-25 07:08:40,211 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 [2023-12-25 07:08:40,257 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 [2023-12-25 07:08:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-25 07:08:41,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:09:08,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:09:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296748357] [2023-12-25 07:09:08,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296748357] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:09:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1186463401] [2023-12-25 07:09:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:09:08,485 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-25 07:09:08,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-25 07:09:08,486 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-25 07:09:08,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-12-25 07:09:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:09:08,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-25 07:09:08,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:09:08,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-25 07:09:08,917 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 [2023-12-25 07:09:08,977 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 11 treesize of output 7 [2023-12-25 07:09:23,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-25 07:09:23,665 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 [2023-12-25 07:09:29,072 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 [2023-12-25 07:09:29,128 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 [2023-12-25 07:09:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-25 07:09:32,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:10:00,059 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 26 treesize of output 22 [2023-12-25 07:10:00,368 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 22 treesize of output 18 [2023-12-25 07:10:24,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1186463401] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:10:24,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:10:24,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2023-12-25 07:10:24,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678800900] [2023-12-25 07:10:24,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 07:10:24,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-25 07:10:24,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:10:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-25 07:10:24,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1687, Unknown=8, NotChecked=0, Total=1892 [2023-12-25 07:10:24,700 INFO L87 Difference]: Start difference. First operand 170 states and 201 transitions. Second operand has 32 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 16 states have call successors, (27), 13 states have call predecessors, (27), 10 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2023-12-25 07:10:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:10:47,702 INFO L93 Difference]: Finished difference Result 231 states and 266 transitions. [2023-12-25 07:10:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-25 07:10:47,703 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 16 states have call successors, (27), 13 states have call predecessors, (27), 10 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) Word has length 79 [2023-12-25 07:10:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:10:47,704 INFO L225 Difference]: With dead ends: 231 [2023-12-25 07:10:47,704 INFO L226 Difference]: Without dead ends: 227 [2023-12-25 07:10:47,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 179 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 95.6s TimeCoverageRelationStatistics Valid=343, Invalid=2511, Unknown=8, NotChecked=0, Total=2862 [2023-12-25 07:10:47,705 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 129 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2023-12-25 07:10:47,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 214 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1053 Invalid, 2 Unknown, 0 Unchecked, 13.9s Time] [2023-12-25 07:10:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-12-25 07:10:47,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2023-12-25 07:10:47,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 146 states have (on average 1.095890410958904) internal successors, (160), 152 states have internal predecessors, (160), 40 states have call successors, (40), 32 states have call predecessors, (40), 38 states have return successors, (60), 40 states have call predecessors, (60), 36 states have call successors, (60) [2023-12-25 07:10:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 260 transitions. [2023-12-25 07:10:47,748 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 260 transitions. Word has length 79 [2023-12-25 07:10:47,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:10:47,749 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 260 transitions. [2023-12-25 07:10:47,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 16 states have call successors, (27), 13 states have call predecessors, (27), 10 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2023-12-25 07:10:47,749 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 260 transitions. [2023-12-25 07:10:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-25 07:10:47,749 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:10:47,749 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 07:10:47,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-12-25 07:10:47,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2023-12-25 07:10:48,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-25 07:10:48,156 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:10:48,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:10:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1449137932, now seen corresponding path program 2 times [2023-12-25 07:10:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:10:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890237859] [2023-12-25 07:10:48,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-25 07:10:48,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:10:48,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:10:48,158 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:10:48,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-12-25 07:10:48,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-25 07:10:48,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-25 07:10:48,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-25 07:10:48,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:10:48,474 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 [2023-12-25 07:10:48,498 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 [2023-12-25 07:10:48,537 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 [2023-12-25 07:10:51,788 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 [2023-12-25 07:10:51,814 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 [2023-12-25 07:10:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-12-25 07:10:53,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:11:11,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:11:11,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890237859] [2023-12-25 07:11:11,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890237859] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:11:11,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1768208927] [2023-12-25 07:11:11,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-25 07:11:11,920 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-25 07:11:11,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-25 07:11:11,924 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-25 07:11:11,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2023-12-25 07:11:12,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-25 07:11:12,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-25 07:11:12,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-25 07:11:12,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:11:12,408 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 [2023-12-25 07:11:12,455 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 [2023-12-25 07:11:12,480 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 [2023-12-25 07:11:27,106 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 [2023-12-25 07:11:27,139 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 [2023-12-25 07:11:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-12-25 07:11:30,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:11:56,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1768208927] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:11:56,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:11:56,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2023-12-25 07:11:56,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370001967] [2023-12-25 07:11:56,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 07:11:56,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-25 07:11:56,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:11:56,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-25 07:11:56,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1251, Unknown=8, NotChecked=0, Total=1406 [2023-12-25 07:11:56,080 INFO L87 Difference]: Start difference. First operand 225 states and 260 transitions. Second operand has 27 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 13 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-25 07:12:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:12:10,681 INFO L93 Difference]: Finished difference Result 261 states and 300 transitions. [2023-12-25 07:12:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-25 07:12:10,681 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 13 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) Word has length 86 [2023-12-25 07:12:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:12:10,683 INFO L225 Difference]: With dead ends: 261 [2023-12-25 07:12:10,683 INFO L226 Difference]: Without dead ends: 257 [2023-12-25 07:12:10,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 55.4s TimeCoverageRelationStatistics Valid=227, Invalid=1657, Unknown=8, NotChecked=0, Total=1892 [2023-12-25 07:12:10,685 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-12-25 07:12:10,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 236 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2023-12-25 07:12:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-12-25 07:12:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 245. [2023-12-25 07:12:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 159 states have (on average 1.0943396226415094) internal successors, (174), 165 states have internal predecessors, (174), 43 states have call successors, (43), 35 states have call predecessors, (43), 42 states have return successors, (68), 44 states have call predecessors, (68), 39 states have call successors, (68) [2023-12-25 07:12:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 285 transitions. [2023-12-25 07:12:10,738 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 285 transitions. Word has length 86 [2023-12-25 07:12:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:12:10,739 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 285 transitions. [2023-12-25 07:12:10,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 2.65) internal successors, (53), 21 states have internal predecessors, (53), 13 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-25 07:12:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 285 transitions. [2023-12-25 07:12:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-25 07:12:10,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:12:10,741 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 07:12:10,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2023-12-25 07:12:10,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-12-25 07:12:11,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:12:11,148 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:12:11,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:12:11,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1808661633, now seen corresponding path program 3 times [2023-12-25 07:12:11,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:12:11,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842819625] [2023-12-25 07:12:11,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-25 07:12:11,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:12:11,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:12:11,150 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:12:11,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-25 07:12:11,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-25 07:12:11,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-25 07:12:11,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 90 conjunts are in the unsatisfiable core [2023-12-25 07:12:11,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:12:11,523 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 [2023-12-25 07:12:11,562 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 [2023-12-25 07:12:14,289 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 17 treesize of output 9 [2023-12-25 07:12:18,586 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 13 [2023-12-25 07:12:18,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-25 07:12:19,398 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 46 treesize of output 30 [2023-12-25 07:12:20,931 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 [2023-12-25 07:12:23,403 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 [2023-12-25 07:12:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 84 proven. 82 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2023-12-25 07:12:24,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:12:36,690 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 44 treesize of output 36 [2023-12-25 07:12:55,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-25 07:12:55,286 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 104 treesize of output 103 [2023-12-25 07:13:03,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:13:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842819625] [2023-12-25 07:13:03,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842819625] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:13:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636512796] [2023-12-25 07:13:03,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-25 07:13:03,997 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-25 07:13:03,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-25 07:13:03,998 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-25 07:13:03,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2023-12-25 07:13:04,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-25 07:13:04,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-25 07:13:04,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-25 07:13:04,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:13:04,607 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 11 treesize of output 7 [2023-12-25 07:13:04,656 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 [2023-12-25 07:13:04,684 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 [2023-12-25 07:13:17,411 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 [2023-12-25 07:13:17,460 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 [2023-12-25 07:13:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 48 proven. 64 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2023-12-25 07:13:23,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:13:46,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636512796] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:13:46,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:13:46,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 37 [2023-12-25 07:13:46,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697989300] [2023-12-25 07:13:46,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 07:13:46,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-25 07:13:46,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:13:46,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-25 07:13:46,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2154, Unknown=5, NotChecked=0, Total=2352 [2023-12-25 07:13:46,087 INFO L87 Difference]: Start difference. First operand 245 states and 285 transitions. Second operand has 38 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 31 states have internal predecessors, (66), 19 states have call successors, (28), 10 states have call predecessors, (28), 13 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) [2023-12-25 07:14:28,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-25 07:14:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:14:55,781 INFO L93 Difference]: Finished difference Result 281 states and 325 transitions. [2023-12-25 07:14:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-25 07:14:55,782 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 31 states have internal predecessors, (66), 19 states have call successors, (28), 10 states have call predecessors, (28), 13 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) Word has length 110 [2023-12-25 07:14:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:14:55,784 INFO L225 Difference]: With dead ends: 281 [2023-12-25 07:14:55,784 INFO L226 Difference]: Without dead ends: 277 [2023-12-25 07:14:55,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 98.8s TimeCoverageRelationStatistics Valid=414, Invalid=3866, Unknown=10, NotChecked=0, Total=4290 [2023-12-25 07:14:55,785 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 76 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 33 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2023-12-25 07:14:55,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 377 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1444 Invalid, 4 Unknown, 0 Unchecked, 31.6s Time] [2023-12-25 07:14:55,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-12-25 07:14:55,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 247. [2023-12-25 07:14:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 160 states have (on average 1.09375) internal successors, (175), 166 states have internal predecessors, (175), 43 states have call successors, (43), 35 states have call predecessors, (43), 43 states have return successors, (71), 45 states have call predecessors, (71), 39 states have call successors, (71) [2023-12-25 07:14:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 289 transitions. [2023-12-25 07:14:55,841 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 289 transitions. Word has length 110 [2023-12-25 07:14:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:14:55,841 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 289 transitions. [2023-12-25 07:14:55,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 31 states have internal predecessors, (66), 19 states have call successors, (28), 10 states have call predecessors, (28), 13 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) [2023-12-25 07:14:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 289 transitions. [2023-12-25 07:14:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-25 07:14:55,843 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:14:55,843 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 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] [2023-12-25 07:14:55,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-12-25 07:14:56,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2023-12-25 07:14:56,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2023-12-25 07:14:56,251 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:14:56,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:14:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1900999922, now seen corresponding path program 1 times [2023-12-25 07:14:56,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:14:56,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993238428] [2023-12-25 07:14:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:14:56,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:14:56,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:14:56,254 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:14:56,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-12-25 07:14:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:14:56,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-25 07:14:56,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:14:56,611 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 [2023-12-25 07:14:57,435 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 [2023-12-25 07:14:58,325 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 [2023-12-25 07:14:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 124 proven. 33 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-25 07:14:59,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:15:06,077 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 12 treesize of output 8 [2023-12-25 07:15:11,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-25 07:15:11,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993238428] [2023-12-25 07:15:11,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993238428] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:15:11,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1020239910] [2023-12-25 07:15:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-25 07:15:11,090 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-25 07:15:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2023-12-25 07:15:11,091 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-25 07:15:11,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-25 07:15:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-25 07:15:11,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-25 07:15:11,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:15:11,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-25 07:15:11,639 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 [2023-12-25 07:15:14,758 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 [2023-12-25 07:15:14,782 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 [2023-12-25 07:15:18,206 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 [2023-12-25 07:15:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 124 proven. 33 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-25 07:15:20,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-25 07:15:23,717 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 12 treesize of output 8 [2023-12-25 07:15:28,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1020239910] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-25 07:15:28,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-25 07:15:28,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-12-25 07:15:28,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578590664] [2023-12-25 07:15:28,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-25 07:15:28,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-25 07:15:28,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-25 07:15:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-25 07:15:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2023-12-25 07:15:28,847 INFO L87 Difference]: Start difference. First operand 247 states and 289 transitions. Second operand has 27 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 15 states have call successors, (30), 12 states have call predecessors, (30), 9 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-12-25 07:15:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-25 07:15:37,870 INFO L93 Difference]: Finished difference Result 314 states and 366 transitions. [2023-12-25 07:15:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-25 07:15:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 15 states have call successors, (30), 12 states have call predecessors, (30), 9 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 90 [2023-12-25 07:15:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-25 07:15:37,872 INFO L225 Difference]: With dead ends: 314 [2023-12-25 07:15:37,872 INFO L226 Difference]: Without dead ends: 242 [2023-12-25 07:15:37,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 236 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2023-12-25 07:15:37,873 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-12-25 07:15:37,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 146 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-12-25 07:15:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-12-25 07:15:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 228. [2023-12-25 07:15:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 148 states have (on average 1.0743243243243243) internal successors, (159), 153 states have internal predecessors, (159), 40 states have call successors, (40), 33 states have call predecessors, (40), 39 states have return successors, (56), 42 states have call predecessors, (56), 36 states have call successors, (56) [2023-12-25 07:15:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 255 transitions. [2023-12-25 07:15:37,921 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 255 transitions. Word has length 90 [2023-12-25 07:15:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-25 07:15:37,921 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 255 transitions. [2023-12-25 07:15:37,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 15 states have call successors, (30), 12 states have call predecessors, (30), 9 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2023-12-25 07:15:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 255 transitions. [2023-12-25 07:15:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-25 07:15:37,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-25 07:15:37,922 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 07:15:37,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2023-12-25 07:15:38,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-12-25 07:15:38,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:15:38,329 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-25 07:15:38,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-25 07:15:38,329 INFO L85 PathProgramCache]: Analyzing trace with hash 927979470, now seen corresponding path program 4 times [2023-12-25 07:15:38,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-25 07:15:38,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45393146] [2023-12-25 07:15:38,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-25 07:15:38,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:15:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-25 07:15:38,331 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-25 07:15:38,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-12-25 07:15:38,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-25 07:15:38,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-25 07:15:38,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 104 conjunts are in the unsatisfiable core [2023-12-25 07:15:38,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-25 07:15:38,781 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 [2023-12-25 07:15:38,822 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 [2023-12-25 07:15:38,853 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 Received shutdown request... [2023-12-25 07:15:43,849 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-25 07:15:43,855 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 [2023-12-25 07:15:43,875 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-25 07:15:43,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-12-25 07:15:44,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-25 07:15:44,076 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 135 with TraceHistMax 17,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ATOM-1 context. [2023-12-25 07:15:44,080 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-25 07:15:44,082 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-25 07:15:44,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.12 07:15:44 BoogieIcfgContainer [2023-12-25 07:15:44,083 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-25 07:15:44,084 INFO L158 Benchmark]: Toolchain (without parser) took 880404.97ms. Allocated memory is still 321.9MB. Free memory was 271.1MB in the beginning and 116.6MB in the end (delta: 154.5MB). Peak memory consumption was 155.4MB. Max. memory is 8.0GB. [2023-12-25 07:15:44,084 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 212.9MB. Free memory is still 165.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-25 07:15:44,084 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.04ms. Allocated memory is still 321.9MB. Free memory was 271.1MB in the beginning and 258.9MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-25 07:15:44,084 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.48ms. Allocated memory is still 321.9MB. Free memory was 258.5MB in the beginning and 257.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-25 07:15:44,084 INFO L158 Benchmark]: Boogie Preprocessor took 36.45ms. Allocated memory is still 321.9MB. Free memory was 257.1MB in the beginning and 254.3MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-25 07:15:44,085 INFO L158 Benchmark]: RCFGBuilder took 587.52ms. Allocated memory is still 321.9MB. Free memory was 254.3MB in the beginning and 231.3MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2023-12-25 07:15:44,085 INFO L158 Benchmark]: TraceAbstraction took 879552.65ms. Allocated memory is still 321.9MB. Free memory was 230.6MB in the beginning and 116.6MB in the end (delta: 114.0MB). Peak memory consumption was 115.6MB. Max. memory is 8.0GB. [2023-12-25 07:15:44,085 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 212.9MB. Free memory is still 165.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 191.04ms. Allocated memory is still 321.9MB. Free memory was 271.1MB in the beginning and 258.9MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.48ms. Allocated memory is still 321.9MB. Free memory was 258.5MB in the beginning and 257.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.45ms. Allocated memory is still 321.9MB. Free memory was 257.1MB in the beginning and 254.3MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 587.52ms. Allocated memory is still 321.9MB. Free memory was 254.3MB in the beginning and 231.3MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. * TraceAbstraction took 879552.65ms. Allocated memory is still 321.9MB. Free memory was 230.6MB in the beginning and 116.6MB in the end (delta: 114.0MB). Peak memory consumption was 115.6MB. 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: 41]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 41). Cancelled while NwaCegarLoop was analyzing trace of length 135 with TraceHistMax 17,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 879.5s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 292.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 mSolverCounterUnknown, 1011 SdHoareTripleChecker+Valid, 168.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 962 mSDsluCounter, 3287 SdHoareTripleChecker+Invalid, 160.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2793 mSDsCounter, 556 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8015 IncrementalHoareTripleChecker+Invalid, 8590 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 556 mSolverCounterUnsat, 494 mSDtfsCounter, 8015 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2309 GetRequests, 1765 SyntacticMatches, 69 SemanticMatches, 475 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 5611 ImplicationChecksByTransitivity, 552.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=247occurred in iteration=15, InterpolantAutomatonStates: 217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 16 MinimizatonAttempts, 96 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 569.4s InterpolantComputationTime, 1601 NumberOfCodeBlocks, 1545 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 1716 ConstructedInterpolants, 1044 QuantifiedInterpolants, 29297 SizeOfPredicates, 624 NumberOfNonLiveVariables, 6601 ConjunctsInSsa, 1349 ConjunctsInUnsatCore, 31 InterpolantComputations, 6 PerfectInterpolantSequences, 2843/3501 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